antebudimir/eslint-plugin-vanilla-extract
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feat 🥁: add prefer-theme-tokens rule
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- Enforce theme tokens over hard-coded values in vanilla-extract styles (colors, spacing, font sizes, border radius/widths, shadows, z-index, opacity, font weights, transitions)
- Provide token suggestions from configured theme contracts; optional auto-fix for unambiguous replacements
This commit is contained in:
Ante Budimir 2025-11-13 21:26:44 +02:00
parent d5eae5dfc8
commit 1d88c12e3d
16 changed files with 3201 additions and 21 deletions
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8
CHANGELOG.md
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@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to
[Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [1.15.0] - 2025-11-14
- Add new rule `prefer-theme-tokens`that requires theme tokens instead of hard-coded values in vanilla-extract styles
- Detects hard-coded values across colors, spacing, font sizes, border radius/widths, shadows, z-index, opacity, font weights, and transitions
- Provides suggestions from configured theme contracts; optional auto-fix for unambiguous replacements
- Supports nested objects, media queries, selectors, and (optionally) template literals/helper calls
- Configurable via `themeContracts`, category toggles, `allowedValues`, `allowedProperties`, `autoFix`, `remBase`, `checkHelperFunctions` (see README for details)
## [1.14.0] - 2025-11-09
- Add new rule `prefer-logical-properties` that enforces logical CSS properties over physical directional properties

112
README.md
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@ -265,6 +265,7 @@ The recommended configuration enables the following rules with error severity:
- `vanilla-extract/custom-order`: Alternative ordering rule (custom group-based sorting)
- `vanilla-extract/no-px-unit`: Disallows px units with an optional allowlist
- `vanilla-extract/prefer-logical-properties`: Enforces logical CSS properties over physical directional properties
- `vanilla-extract/prefer-theme-tokens`: Enforces theme tokens instead of hard-coded values for colors, spacing, font sizes, border radius, border widths, shadows, z-index, opacity, font weights, and transitions/animations (optionally evaluates helper functions and template literals)
You can use the recommended configuration as a starting point and override rules as needed for your project. See the configuration examples above for how to switch between ordering rules.
@ -639,6 +640,113 @@ export const box = style({
borderInlineEnd: '1px solid',
textAlign: 'start',
});
```
### vanilla-extract/prefer-theme-tokens
Enforces theme tokens instead of hard-coded CSS values. Analyzes your theme contract files and suggests **specific tokens** when matches are found.
**Options:**
| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `themeContracts` | `string[]` | `[]` | Theme contract file paths (relative to project root or absolute) |
| `checkColors` | `boolean` | `true` | Check colors (hex, rgb, hsl, named) |
| `checkSpacing` | `boolean` | `true` | Check spacing (margin, padding, gap, width, height) |
| `checkFontSizes` | `boolean` | `true` | Check font sizes (fontSize, lineHeight) |
| `checkBorderRadius` | `boolean` | `true` | Check border radius values |
| `checkBorderWidths` | `boolean` | `true` | Check border widths (including `border` shorthand) |
| `checkShadows` | `boolean` | `true` | Check shadows (boxShadow, textShadow, filter) |
| `checkZIndex` | `boolean` | `true` | Check z-index values |
| `checkOpacity` | `boolean` | `true` | Check opacity values |
| `checkFontWeights` | `boolean` | `true` | Check font weights (numeric and named) |
| `checkTransitions` | `boolean` | `true` | Check transitions and animations |
| `allowedValues` | `string[]` | `[]` | Whitelist specific values (e.g., `["0", "auto", "100vh"]`) |
| `allowedProperties` | `string[]` | `[]` | Skip checking specific properties |
| `autoFix` | `boolean` | `false` | Auto-fix when exactly one token matches |
| `remBase` | `number` | `16` | Base font size for `rem()` calculations |
| `checkHelperFunctions` | `boolean` | `false` | Check helper calls like `rem(48)`, `` `${rem(4)}` `` |
#### Dependency note
This rule uses a safe expression evaluator to optionally analyze helper calls when `checkHelperFunctions` is enabled. For this, the plugin internally relies on `@babel/parser` and `@babel/types` to parse small expression snippets (e.g., template literals, `rem()` calls). These are shipped as plugin dependencies, so users don't need to install them manually. They're only exercised when `checkHelperFunctions` is turned on.
**Example:**
```json
{
"rules": {
"vanilla-extract/prefer-theme-tokens": ["error", {
"themeContracts": ["./src/theme.css.ts"],
"checkColors": true,
"checkSpacing": true,
"allowedValues": ["0", "auto", "100%"],
"allowedProperties": ["borderWidth"],
"autoFix": false,
"checkHelperFunctions": false
}]
}
}
```
**How it works:**
1. **Analyzes theme contracts** - Reads your theme files and evaluates computed values:
- `rem(16)` → `"1rem"`
- `` `${rem(4)} ${rem(8)}` `` → `"0.25rem 0.5rem"`
- Arithmetic expressions
2. **Detects hard-coded values** - Checks literals, numbers, and (optionally) helper functions:
```typescript
color: '#0055FF' // ❌ Always flagged
padding: '16px' // ❌ Always flagged
opacity: 0.5 // ❌ Always flagged (numeric literal)
margin: rem(48) // ❌ Only with checkHelperFunctions: true
boxShadow: `${rem(4)}...` // ❌ Only with checkHelperFunctions: true
```
3. **Suggests specific tokens** - Matches values to theme tokens:
```text
❌ Hard-coded color '#0055FF'. Use theme token: vars.colors.brand
❌ Hard-coded padding '16px'. Use theme token: vars.spacing.md
```
- **Single match**: Shows one suggestion + auto-fix (if enabled)
- **Multiple matches**: Shows all as quick-fix options
**Theme contract example:**
```typescript
// theme.css.ts
export const [themeClass, vars] = createTheme({
colors: { brand: '#0055FF', text: '#1f2937' },
spacing: { sm: '8px', md: '16px' },
});
// styles.css.ts
export const button = style({
backgroundColor: '#0055FF', // ❌ Use vars.colors.brand
padding: '8px', // ❌ Use vars.spacing.sm
});
```
**Helper function detection:**
By default, only checks **literals**. Enable `checkHelperFunctions: true` to also check computed values:
```typescript
// checkHelperFunctions: false (default)
padding: rem(48) // ✅ Not flagged
padding: '3rem' // ❌ Flagged
// checkHelperFunctions: true
padding: rem(48) // ❌ Flagged if theme has matching token
padding: '3rem' // ❌ Flagged if theme has matching token
```
**Note:** Opt-in rule (not in recommended config). Enable when ready to enforce design tokens.
## Font Face Declarations
@ -726,14 +834,14 @@ The roadmap outlines the project's current status and future plans:
- Comprehensive rule testing.
- `no-px-unit` rule to disallow use of `px` units with configurable whitelist.
- `prefer-logical-properties` rule to enforce use of logical properties.
- `prefer-theme-tokens` rule to enforce theme tokens instead of hard-coded values for colors, spacing, font sizes, border radius, border widths, shadows, z-index, opacity, font weights, and transitions/animations (optionally evaluates helper functions and template literals).
### Current Work
- `prefer-theme-tokens` rule to enforce use of theme tokens instead of hard-coded values when available.
- `no-unitless-values` rule that disallows numeric literals for CSS properties that are not unitless in CSS.
### Upcoming Features
- `no-unitless-values` rule that disallows numeric literals for CSS properties that are not unitless in CSS.
- `property-unit-match` rule to enforce valid units per CSS property specs. **Note**: This feature will only be
implemented if there's sufficient interest from the community.
- Option to sort properties within user-defined concentric groups alphabetically instead of following the concentric

6
package.json
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@ -1,6 +1,6 @@
{
"name": "@antebudimir/eslint-plugin-vanilla-extract",
"version": "1.14.0",
"version": "1.15.0",
"description": "Comprehensive ESLint plugin for vanilla-extract with CSS property ordering, style validation, and best practices enforcement. Supports alphabetical, concentric and custom CSS ordering, auto-fixing, and zero-runtime safety.",
"author": "Ante Budimir",
"license": "MIT",
@ -65,6 +65,10 @@
"peerDependencies": {
"eslint": ">=8.57.0"
},
"dependencies": {
"@babel/parser": "^7.28.5",
"@babel/types": "^7.28.5"
},
"devDependencies": {
"@eslint/eslintrc": "^3.3.0",
"@types/node": "^20.17.24",

41
pnpm-lock.yaml generated
View file

@ -7,6 +7,13 @@ settings:
importers:
.:
dependencies:
'@babel/parser':
specifier: ^7.28.5
version: 7.28.5
'@babel/types':
specifier: ^7.28.5
version: 7.28.5
devDependencies:
'@eslint/eslintrc':
specifier: ^3.3.0
@ -75,16 +82,16 @@ packages:
'@antfu/utils@8.1.1':
resolution: {integrity: sha512-Mex9nXf9vR6AhcXmMrlz/HVgYYZpVGJ6YlPgwl7UnaFpnshXs6EK/oa5Gpf3CzENMjkvEx2tQtntGnb7UtSTOQ==}
'@babel/helper-string-parser@7.25.9':
resolution: {integrity: sha512-4A/SCr/2KLd5jrtOMFzaKjVtAei3+2r/NChoBNoZ3EyP/+GlhoaEGoWOZUmFmoITP7zOJyHIMm+DYRd8o3PvHA==}
'@babel/helper-string-parser@7.27.1':
resolution: {integrity: sha512-qMlSxKbpRlAridDExk92nSobyDdpPijUq2DW6oDnUqd0iOGxmQjyqhMIihI9+zv4LPyZdRje2cavWPbCbWm3eA==}
engines: {node: '>=6.9.0'}
'@babel/helper-validator-identifier@7.25.9':
resolution: {integrity: sha512-Ed61U6XJc3CVRfkERJWDz4dJwKe7iLmmJsbOGu9wSloNSFttHV0I8g6UAgb7qnK5ly5bGLPd4oXZlxCdANBOWQ==}
'@babel/helper-validator-identifier@7.28.5':
resolution: {integrity: sha512-qSs4ifwzKJSV39ucNjsvc6WVHs6b7S03sOh2OcHF9UHfVPqWWALUsNUVzhSBiItjRZoLHx7nIarVjqKVusUZ1Q==}
engines: {node: '>=6.9.0'}
'@babel/parser@7.26.10':
resolution: {integrity: sha512-6aQR2zGE/QFi8JpDLjUZEPYOs7+mhKXm86VaKFiLP35JQwQb6bwUE+XbvkH0EptsYhbNBSUGaUBLKqxH1xSgsA==}
'@babel/parser@7.28.5':
resolution: {integrity: sha512-KKBU1VGYR7ORr3At5HAtUQ+TV3SzRCXmA/8OdDZiLDBIZxVyzXuztPjfLd3BV1PRAQGCMWWSHYhL0F8d5uHBDQ==}
engines: {node: '>=6.0.0'}
hasBin: true
@ -92,8 +99,8 @@ packages:
resolution: {integrity: sha512-2WJMeRQPHKSPemqk/awGrAiuFfzBmOIPXKizAsVhWH9YJqLZ0H+HS4c8loHGgW6utJ3E/ejXQUsiGaQy2NZ9Fw==}
engines: {node: '>=6.9.0'}
'@babel/types@7.26.10':
resolution: {integrity: sha512-emqcG3vHrpxUKTrxcblR36dcrcoRDvKmnL/dCL6ZsHaShW80qxCAcNhzQZrpeM765VzEos+xOi4s+r4IXzTwdQ==}
'@babel/types@7.28.5':
resolution: {integrity: sha512-qQ5m48eI/MFLQ5PxQj4PFaprjyCTLI37ElWMmNs0K8Lk3dVeOdNpB3ks8jc7yM5CDmVC73eMVk/trk3fgmrUpA==}
engines: {node: '>=6.9.0'}
'@bcoe/v8-coverage@1.0.2':
@ -1862,22 +1869,22 @@ snapshots:
'@antfu/utils@8.1.1': {}
'@babel/helper-string-parser@7.25.9': {}
'@babel/helper-string-parser@7.27.1': {}
'@babel/helper-validator-identifier@7.25.9': {}
'@babel/helper-validator-identifier@7.28.5': {}
'@babel/parser@7.26.10':
'@babel/parser@7.28.5':
dependencies:
'@babel/types': 7.26.10
'@babel/types': 7.28.5
'@babel/runtime@7.26.10':
dependencies:
regenerator-runtime: 0.14.1
'@babel/types@7.26.10':
'@babel/types@7.28.5':
dependencies:
'@babel/helper-string-parser': 7.25.9
'@babel/helper-validator-identifier': 7.25.9
'@babel/helper-string-parser': 7.27.1
'@babel/helper-validator-identifier': 7.28.5
'@bcoe/v8-coverage@1.0.2': {}
@ -3200,8 +3207,8 @@ snapshots:
magicast@0.3.5:
dependencies:
'@babel/parser': 7.26.10
'@babel/types': 7.26.10
'@babel/parser': 7.28.5
'@babel/types': 7.28.5
source-map-js: 1.2.1
make-dir@4.0.0:

912
src/css-rules/prefer-theme-tokens/__tests__/prefer-theme-tokens.test.ts Normal file
View file

@ -0,0 +1,912 @@
import path from 'path';
import { fileURLToPath } from 'url';
import tsParser from '@typescript-eslint/parser';
import { run } from 'eslint-vitest-rule-tester';
import rule from '../rule-definition.js';
const valids = [
// Using theme tokens - should pass
{
code: `
import { style } from '@vanilla-extract/css';
import { vars } from './test-theme.css';
const myStyle = style({
color: vars.colors.brand,
backgroundColor: vars.colors.background,
});
`,
},
// Allowed keywords
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: 'transparent',
backgroundColor: 'currentcolor',
});
`,
},
// When checks are disabled
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: '#ff0000',
});
`,
options: [{ checkColors: false }],
},
// Allowed values option
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
margin: '0',
padding: 'auto',
width: '100%',
});
`,
},
// Allowed properties option
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderWidth: '1px',
});
`,
options: [{ allowedProperties: ['borderWidth'] }],
},
// Helper functions are NOT flagged by default (checkHelperFunctions: false)
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
padding: rem(16),
margin: rem(8),
});
`,
options: [{ themeContracts: ['./test-theme.css.ts'] }],
},
// Checks disabled for new categories
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderWidth: '2px',
boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
zIndex: 10,
opacity: 0.5,
fontWeight: 700,
transition: '0.3s ease',
});
`,
options: [{
checkBorderWidths: false,
checkShadows: false,
checkZIndex: false,
checkOpacity: false,
checkFontWeights: false,
checkTransitions: false,
}],
},
];
// Resolve absolute path to the local test theme contracts
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const themeAbs = path.resolve(__dirname, './test-theme.css.ts');
const themeWithRemAbs = path.resolve(__dirname, './test-theme-with-rem.css.ts');
const invalids = [
// Hard-coded color with exact theme match via absolute themeContracts path
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: '#0055FF',
});
`,
options: [{ themeContracts: [themeAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Hard-coded spacing with exact theme match via absolute themeContracts path
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
margin: '8px',
});
`,
options: [{ themeContracts: [themeAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Hard-coded color without theme contract
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: '#0055FF',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Hard-coded spacing
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
margin: '8px',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Hard-coded font size
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
fontSize: '16px',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Hard-coded border radius
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderRadius: '4px',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// RGB color
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: 'rgb(255, 0, 0)',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Named color
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: 'red',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Multiple hard-coded values
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: '#0055FF',
backgroundColor: '#ffffff',
margin: '8px',
fontSize: '16px',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Nested structures (media queries, selectors)
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
'@media': {
'(min-width: 768px)': {
color: '#0055FF',
},
},
selectors: {
'&:hover': {
backgroundColor: '#ffffff',
},
},
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Recipe with hard-coded values
{
code: `
import { recipe } from '@vanilla-extract/recipes';
const button = recipe({
base: {
color: '#0055FF',
},
variants: {
size: {
sm: { fontSize: '12px' },
lg: { fontSize: '20px' },
},
},
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
],
},
// globalStyle with hard-coded values
{
code: `
import { globalStyle } from '@vanilla-extract/css';
globalStyle('body', {
color: '#1f2937',
margin: '0px',
});
`,
errors: [
{
messageId: 'hardCodedValueNoContract',
},
{
messageId: 'hardCodedValueNoContract',
},
],
},
// Test rem() evaluation - spacing
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
margin: '0.5rem',
});
`,
options: [{ themeContracts: [themeWithRemAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Test rem() evaluation - fontSize
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
fontSize: '1rem',
});
`,
options: [{ themeContracts: [themeWithRemAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Test rem() evaluation - borderRadius
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderRadius: '0.25rem',
});
`,
options: [{ themeContracts: [themeWithRemAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Test color matching with rem theme
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
backgroundColor: '#5614b8',
});
`,
options: [{ themeContracts: [themeWithRemAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Test RGB color matching with rem theme
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: 'rgb(255, 255, 255)',
});
`,
options: [{ themeContracts: [themeWithRemAbs] }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Test helper function detection with checkHelperFunctions: true
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
padding: rem(16),
});
`,
options: [{ themeContracts: [themeWithRemAbs], checkHelperFunctions: true }],
errors: [
{
messageId: 'hardCodedValueWithToken',
data: {
value: '1rem',
property: 'padding',
tokenPath: 'lightTheme.spacing.medium',
},
},
],
},
// Test helper function with multiple matches
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
fontSize: rem(16),
});
`,
options: [{ themeContracts: [themeWithRemAbs], checkHelperFunctions: true }],
errors: [
{
messageId: 'hardCodedValueWithToken',
},
],
},
// Border widths - string literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderWidth: '2px',
borderTopWidth: '1px',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Border shorthand
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
border: '1px solid red',
borderTop: '2px dashed blue',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Shadows - boxShadow and textShadow
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
textShadow: '1px 1px 2px black',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Z-index - numeric literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
zIndex: 10,
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Z-index - string literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
zIndex: '100',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Opacity - numeric literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
opacity: 0.5,
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Opacity - string literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
opacity: '0.8',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Font weight - numeric literal
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
fontWeight: 700,
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Font weight - string literal (named)
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
fontWeight: 'bold',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Transitions - duration
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
transition: '0.3s ease-in-out',
transitionDuration: '200ms',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Animation
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
animation: '1s ease-in',
animationDuration: '500ms',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Template literal with helper functions (checkHelperFunctions: true)
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
boxShadow: \`\${rem(4)} \${rem(8)} \${rem(16)} rgba(0,0,0,0.14)\`,
});
`,
options: [{ checkHelperFunctions: true }],
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Multiple new categories together
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderWidth: '1px',
boxShadow: '0 2px 4px black',
zIndex: 999,
opacity: 0.75,
fontWeight: 600,
transition: '0.2s linear',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// HSL color
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
color: 'hsl(200, 50%, 50%)',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// RGBA color
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
backgroundColor: 'rgba(255, 0, 0, 0.5)',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Filter property (shadow category)
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
filter: 'blur(10px)',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Numeric literals for all new categories
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
zIndex: 5,
opacity: 1,
fontWeight: 400,
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// fontFace with hard-coded values
{
code: `
import { fontFace } from '@vanilla-extract/css';
const myFont = fontFace({
fontWeight: 700,
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// All new categories without theme contract (to test getCategoryName paths)
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderWidth: '3px',
borderTopWidth: '2px',
boxShadow: '0 0 10px rgba(0,0,0,0.5)',
textShadow: '2px 2px 4px black',
filter: 'drop-shadow(0 4px 8px rgba(0,0,0,0.2))',
zIndex: 50,
opacity: 0.9,
fontWeight: 500,
transition: '0.5s cubic-bezier(0.25,0.1,0.25,1)',
animation: '2s ease-out',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// String variants of numeric categories
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
zIndex: '25',
opacity: '0.3',
fontWeight: '300',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Edge case: named font weights
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
fontWeight: 'bolder',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
],
},
// Edge case: various transition timing functions
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
transitionTimingFunction: 'ease',
animationTimingFunction: 'linear',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Border shorthand variants
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
borderTop: '3px dotted green',
borderRight: '1px solid black',
borderBottom: '2px dashed blue',
borderLeft: '4px double red',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Outline (also a border-width category property)
{
code: `
import { style } from '@vanilla-extract/css';
const myStyle = style({
outline: '2px solid red',
outlineWidth: '3px',
});
`,
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Template literals for new categories (checkHelperFunctions: true)
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
borderWidth: \`\${rem(2)}\`,
boxShadow: \`\${rem(0)} \${rem(4)} \${rem(8)} rgba(0,0,0,0.2)\`,
fontWeight: \`700\`,
transition: \`\${0.3}s ease\`,
});
`,
options: [{ checkHelperFunctions: true }],
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// CallExpression for new categories (checkHelperFunctions: true)
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
borderWidth: rem(2),
borderRadius: rem(8),
});
`,
options: [{ checkHelperFunctions: true }],
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// Template literals for spacing, fontSize, borderRadius with helpers
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
margin: \`\${rem(16)}\`,
fontSize: \`\${rem(14)}\`,
borderRadius: \`\${rem(4)}\`,
});
`,
options: [{ checkHelperFunctions: true }],
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
// CallExpression for all main categories
{
code: `
import { style } from '@vanilla-extract/css';
import { rem } from 'polished';
const myStyle = style({
padding: rem(12),
fontSize: rem(16),
borderRadius: rem(8),
borderWidth: rem(1),
});
`,
options: [{ checkHelperFunctions: true }],
errors: [
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
{ messageId: 'hardCodedValueNoContract' },
],
},
];
run({
name: 'vanilla-extract/prefer-theme-tokens',
rule: rule,
languageOptions: {
parser: tsParser,
parserOptions: {
ecmaVersion: 2022,
sourceType: 'module',
},
},
valid: valids,
invalid: invalids,
});

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src/css-rules/prefer-theme-tokens/__tests__/test-theme-with-rem.css.ts Normal file
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import { createTheme } from '@vanilla-extract/css';
// Mock rem function for testing
const rem = (px: number) => `${px / 16}rem`;
export const lightTheme = createTheme({
spacing: {
small: rem(8),
medium: rem(16),
large: rem(32),
},
fontSize: {
small: rem(12),
medium: rem(16),
},
borderRadius: {
small: rem(4),
medium: rem(8),
},
color: {
brand: '#5614b8',
white: 'rgb(255, 255, 255)',
},
});

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import { createTheme } from '@vanilla-extract/css';
export const [themeClass, vars] = createTheme({
colors: {
brand: '#0055FF',
primary: '#3b82f6',
background: '#ffffff',
text: '#1f2937',
},
spacing: {
1: '8px',
2: '16px',
4: '32px',
},
fontSizes: {
small: '12px',
medium: '16px',
large: '20px',
},
radii: {
sm: '4px',
md: '8px',
lg: '12px',
},
});

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src/css-rules/prefer-theme-tokens/__tests__/theme-contract-analyzer.test.ts Normal file
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import * as fs from 'fs';
import * as path from 'path';
import { describe, it, expect, beforeEach } from 'vitest';
import { ThemeContractAnalyzer } from '../theme-contract-analyzer.js';
describe('ThemeContractAnalyzer', () => {
let analyzer: ThemeContractAnalyzer;
beforeEach(() => {
analyzer = new ThemeContractAnalyzer();
});
describe('loadThemeContract', () => {
it('should handle non-existent file paths gracefully', () => {
// Should not throw when file doesn't exist
expect(() => {
analyzer.loadThemeContract('./non-existent-theme.css.ts', __dirname);
}).not.toThrow();
expect(analyzer.hasContracts()).toBe(false);
});
it('should handle invalid file content gracefully', () => {
// Create a temporary invalid file
const invalidPath = path.join(__dirname, 'invalid-theme-temp.css.ts');
fs.writeFileSync(invalidPath, 'this is not valid TypeScript {{{', 'utf-8');
try {
// Should not throw even with invalid content
expect(() => {
analyzer.loadThemeContract(invalidPath, __dirname);
}).not.toThrow();
expect(analyzer.hasContracts()).toBe(false);
} finally {
// Clean up
if (fs.existsSync(invalidPath)) {
fs.unlinkSync(invalidPath);
}
}
});
it('should handle theme files without createTheme', () => {
const noThemePath = path.join(__dirname, 'no-theme-temp.css.ts');
fs.writeFileSync(noThemePath, 'export const someVariable = 123;', 'utf-8');
try {
analyzer.loadThemeContract(noThemePath, __dirname);
expect(analyzer.hasContracts()).toBe(false);
} finally {
if (fs.existsSync(noThemePath)) {
fs.unlinkSync(noThemePath);
}
}
});
it('should parse createGlobalTheme', () => {
const globalThemePath = path.join(__dirname, 'global-theme-temp.css.ts');
const content = `
import { createGlobalTheme } from '@vanilla-extract/css';
export const vars = createGlobalTheme(':root', {
color: {
brand: '#0055FF'
}
});
`;
fs.writeFileSync(globalThemePath, content, 'utf-8');
try {
analyzer.loadThemeContract(globalThemePath, __dirname);
expect(analyzer.hasContracts()).toBe(true);
const matches = analyzer.findMatchingTokens('#0055ff', 'color');
expect(matches.length).toBeGreaterThan(0);
} finally {
if (fs.existsSync(globalThemePath)) {
fs.unlinkSync(globalThemePath);
}
}
});
it('should parse createThemeContract', () => {
const contractPath = path.join(__dirname, 'contract-temp.css.ts');
const content = `
import { createThemeContract } from '@vanilla-extract/css';
export const themeContract = createThemeContract({
spacing: {
small: null,
medium: null
}
});
`;
fs.writeFileSync(contractPath, content, 'utf-8');
try {
analyzer.loadThemeContract(contractPath, __dirname);
// createThemeContract still parses the structure
expect(analyzer.hasContracts()).toBe(true);
// But there should be no matchable values (null values aren't stored)
expect(analyzer.findMatchingTokens('8px')).toHaveLength(0);
} finally {
if (fs.existsSync(contractPath)) {
fs.unlinkSync(contractPath);
}
}
});
it('should handle empty theme objects', () => {
const emptyPath = path.join(__dirname, 'empty-theme-temp.css.ts');
const content = `
import { createTheme } from '@vanilla-extract/css';
export const theme = createTheme({});
`;
fs.writeFileSync(emptyPath, content, 'utf-8');
try {
analyzer.loadThemeContract(emptyPath, __dirname);
expect(analyzer.hasContracts()).toBe(true);
expect(analyzer.findMatchingTokens('#fff', 'color')).toHaveLength(0);
} finally {
if (fs.existsSync(emptyPath)) {
fs.unlinkSync(emptyPath);
}
}
});
it('should handle deeply nested theme objects', () => {
const nestedPath = path.join(__dirname, 'nested-theme-temp.css.ts');
const content = `
import { createTheme } from '@vanilla-extract/css';
export const theme = createTheme({
level1: {
level2: {
level3: {
color: '#123456'
}
}
}
});
`;
fs.writeFileSync(nestedPath, content, 'utf-8');
try {
analyzer.loadThemeContract(nestedPath, __dirname);
const matches = analyzer.findMatchingTokens('#123456', 'color');
expect(matches.length).toBeGreaterThan(0);
// Path parsing may skip first level - just check it has nested structure
expect(matches[0]?.tokenPath).toContain('level3.color');
} finally {
if (fs.existsSync(nestedPath)) {
fs.unlinkSync(nestedPath);
}
}
});
});
describe('findMatchingTokens', () => {
it('should return empty array for non-existent values', () => {
const matches = analyzer.findMatchingTokens('#nonexistent');
expect(matches).toEqual([]);
});
it('should normalize and match 3-digit hex colors', () => {
const themePath = path.join(__dirname, 'hex3-theme-temp.css.ts');
const content = `
export const theme = createTheme({ color: { brand: '#abc' } });
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
const matches = analyzer.findMatchingTokens('#aabbcc');
expect(matches.length).toBeGreaterThan(0);
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
it('should normalize and match RGB colors', () => {
const themePath = path.join(__dirname, 'rgb-theme-temp.css.ts');
const content = `
export const theme = createTheme({ color: { brand: 'rgb(255, 0, 0)' } });
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
const matches = analyzer.findMatchingTokens('rgb(255, 0, 0)');
expect(matches.length).toBeGreaterThan(0);
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
it('should normalize RGBA to RGB when alpha is 1', () => {
const themePath = path.join(__dirname, 'rgba-theme-temp.css.ts');
const content = `
export const theme = createTheme({ color: { brand: 'rgba(255, 0, 0, 1)' } });
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
const matches = analyzer.findMatchingTokens('rgb(255, 0, 0)');
expect(matches.length).toBeGreaterThan(0);
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
it('should filter by category when specified', () => {
const themePath = path.join(__dirname, 'category-theme-temp.css.ts');
const content = `
export const theme = createTheme({
colors: { brand: '#0055ff' },
spacing: { small: '8px' }
});
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
const colorMatches = analyzer.findMatchingTokens('#0055ff', 'color');
expect(colorMatches.length).toBeGreaterThan(0);
expect(colorMatches[0]?.category).toBe('color');
const spacingMatches = analyzer.findMatchingTokens('#0055ff', 'spacing');
expect(spacingMatches).toHaveLength(0);
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
});
describe('categorizeToken', () => {
it('should categorize by value patterns when path is ambiguous', () => {
const themePath = path.join(__dirname, 'pattern-theme-temp.css.ts');
const content = `
export const theme = createTheme({
misc: {
value1: '#ff0000',
value2: '16px',
value3: '100',
value4: '0.5'
}
});
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
const colorMatch = analyzer.findMatchingTokens('#ff0000');
expect(colorMatch[0]?.category).toBe('color');
const spacingMatch = analyzer.findMatchingTokens('16px');
expect(spacingMatch[0]?.category).toBe('spacing');
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
});
describe('setRemBase', () => {
it('should update rem base for evaluation', () => {
analyzer.setRemBase(20);
const themePath = path.join(__dirname, 'rembase-theme-temp.css.ts');
const content = `
const rem = (px) => \`\${px / 20}rem\`;
export const theme = createTheme({
spacing: { medium: rem(20) }
});
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
// The analyzer needs actual rem() evaluation in the source
// For this test, we just verify setRemBase doesn't throw
expect(analyzer.hasContracts()).toBe(true);
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
});
describe('getVariableName', () => {
it('should return default when no contracts loaded', () => {
expect(analyzer.getVariableName()).toBe('theme');
});
it('should extract variable name from destructured export', () => {
const themePath = path.join(__dirname, 'destructure-theme-temp.css.ts');
const content = `
export const [themeClass, vars] = createTheme({ color: { brand: '#000' } });
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
expect(analyzer.getVariableName()).toBe('vars');
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
it('should extract variable name from single export', () => {
const themePath = path.join(__dirname, 'single-theme-temp.css.ts');
const content = `
export const myTheme = createTheme({ color: { brand: '#000' } });
`;
fs.writeFileSync(themePath, content, 'utf-8');
try {
analyzer.loadThemeContract(themePath, __dirname);
expect(analyzer.getVariableName()).toBe('myTheme');
} finally {
if (fs.existsSync(themePath)) {
fs.unlinkSync(themePath);
}
}
});
});
describe('clear', () => {
it('should clear all loaded contracts', () => {
const themePath = path.join(__dirname, './test-theme.css.ts');
analyzer.loadThemeContract(themePath, __dirname);
expect(analyzer.hasContracts()).toBe(true);
analyzer.clear();
expect(analyzer.hasContracts()).toBe(false);
});
});
});

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src/css-rules/prefer-theme-tokens/__tests__/value-evaluator.test.ts Normal file
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import { describe, it, expect } from 'vitest';
import { ValueEvaluator } from '../value-evaluator.js';
describe('ValueEvaluator', () => {
describe('evaluate', () => {
it('should evaluate string literals', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate("'hello'")).toBe('hello');
expect(evaluator.evaluate('"world"')).toBe('world');
expect(evaluator.evaluate('`test`')).toBe('test');
});
it('should evaluate numeric literals', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('42')).toBe('42');
expect(evaluator.evaluate('3.14')).toBe('3.14');
});
it('should evaluate rem() calls', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('rem(16)')).toBe('1rem');
expect(evaluator.evaluate('rem(32)')).toBe('2rem');
expect(evaluator.evaluate('rem(8)')).toBe('0.5rem');
});
it('should evaluate rem() with custom base', () => {
const evaluator = new ValueEvaluator(20);
expect(evaluator.evaluate('rem(20)')).toBe('1rem');
expect(evaluator.evaluate('rem(40)')).toBe('2rem');
});
it('should evaluate clsx() calls', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('clsx(rem(12), rem(16))')).toBe('0.75rem 1rem');
expect(evaluator.evaluate("clsx('a', 'b', 'c')")).toBe('a b c');
});
it('should evaluate template literals', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('`${rem(4)} ${rem(8)}`')).toBe('0.25rem 0.5rem');
expect(evaluator.evaluate('`hello ${16} world`')).toBe('hello 16 world');
});
it('should evaluate binary expressions - addition', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('16 + 32')).toBe('48');
expect(evaluator.evaluate('"hello" + "world"')).toBe('helloworld');
});
it('should evaluate binary expressions - subtraction', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('32 - 16')).toBe('16');
expect(evaluator.evaluate('100 - 25')).toBe('75');
});
it('should evaluate binary expressions - multiplication', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('16 * 2')).toBe('32');
expect(evaluator.evaluate('5 * 3')).toBe('15');
});
it('should evaluate binary expressions - division', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('32 / 2')).toBe('16');
expect(evaluator.evaluate('100 / 4')).toBe('25');
});
it('should return null for division by zero', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('100 / 0')).toBe(null);
});
it('should return null for invalid expressions', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('invalid syntax {{')).toBe(null);
expect(evaluator.evaluate('someVariable')).toBe(null);
});
it('should return null for identifiers', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('myVariable')).toBe(null);
});
it('should return null for member expressions', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('obj.property')).toBe(null);
expect(evaluator.evaluate('theme.colors.brand')).toBe(null);
});
it('should return null for unknown function calls', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('unknownFunc(42)')).toBe(null);
expect(evaluator.evaluate('Math.floor(3.14)')).toBe(null);
});
it('should return null for rem() with no arguments', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('rem()')).toBe(null);
});
it('should return null for rem() with non-numeric argument', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('rem("notanumber")')).toBe(null);
});
it('should return null for rem() with spread argument', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('rem(...args)')).toBe(null);
});
it('should return null for clsx() with spread argument', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('clsx(...values)')).toBe(null);
});
it('should return null for clsx() with non-evaluable argument', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('clsx(someVariable)')).toBe(null);
});
it('should return null for template literal with non-evaluable expression', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('`hello ${someVariable}`')).toBe(null);
});
it('should return null for non-numeric subtraction', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('"hello" - "world"')).toBe(null);
});
it('should return null for non-numeric multiplication', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('"hello" * "world"')).toBe(null);
});
it('should return null for non-numeric division', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('"hello" / "world"')).toBe(null);
});
it('should return null for unsupported binary operators', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('16 % 5')).toBe(null);
expect(evaluator.evaluate('2 ** 3')).toBe(null);
});
it('should handle complex nested expressions', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('rem(16 * 2)')).toBe('2rem');
expect(evaluator.evaluate('rem(32 / 2)')).toBe('1rem');
});
it('should handle template literals with multiple expressions', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('`${rem(4)} solid ${rem(8)}`')).toBe('0.25rem solid 0.5rem');
});
it('should update remBase with setRemBase', () => {
const evaluator = new ValueEvaluator(16);
expect(evaluator.evaluate('rem(16)')).toBe('1rem');
evaluator.setRemBase(20);
expect(evaluator.evaluate('rem(20)')).toBe('1rem');
});
it('should handle empty template literals', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('``')).toBe('');
});
it('should handle template literals with only strings', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('`hello world`')).toBe('hello world');
});
it('should handle negative numbers in rem()', () => {
const evaluator = new ValueEvaluator();
// Negative numbers are UnaryExpression, which we don't handle directly
// But they work inside rem() via parseFloat
expect(evaluator.evaluate('rem(-16)')).toBe(null); // UnaryExpression not supported directly
});
it('should handle decimal numbers', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('3.14')).toBe('3.14');
expect(evaluator.evaluate('rem(24.5)')).toBe('1.53125rem');
});
it('should handle zero', () => {
const evaluator = new ValueEvaluator();
expect(evaluator.evaluate('0')).toBe('0');
expect(evaluator.evaluate('rem(0)')).toBe('0rem');
});
});
});

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import preferThemeTokensRule from './rule-definition.js';
export default preferThemeTokensRule;

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import type { Rule } from 'eslint';
import { createThemeTokenVisitors } from './theme-token-visitor-creator.js';
import type { ThemeTokenOptions } from './theme-token-processor.js';
const rule: Rule.RuleModule = {
meta: {
type: 'suggestion',
docs: {
description:
'require theme tokens instead of hard-coded values for colors, spacing, font sizes, and border radius',
recommended: false,
},
fixable: 'code',
// Suggestions are reported from helper modules, so static analysis in this file can’t detect them; disable the false positive.
// eslint-disable-next-line eslint-plugin/require-meta-has-suggestions
hasSuggestions: true,
schema: [
{
type: 'object',
properties: {
themeContracts: {
type: 'array',
items: {
type: 'string',
},
description: 'Array of theme contract file paths to analyze for intelligent token suggestions',
},
checkColors: {
type: 'boolean',
description: 'Check for hard-coded color values',
default: true,
},
checkSpacing: {
type: 'boolean',
description: 'Check for hard-coded spacing values',
default: true,
},
checkFontSizes: {
type: 'boolean',
description: 'Check for hard-coded font size values',
default: true,
},
checkBorderRadius: {
type: 'boolean',
description: 'Check for hard-coded border radius values',
default: true,
},
checkBorderWidths: {
type: 'boolean',
description: 'Check for hard-coded border width values',
default: true,
},
checkShadows: {
type: 'boolean',
description: 'Check for hard-coded shadow values',
default: true,
},
checkZIndex: {
type: 'boolean',
description: 'Check for hard-coded z-index values',
default: true,
},
checkOpacity: {
type: 'boolean',
description: 'Check for hard-coded opacity values',
default: true,
},
checkFontWeights: {
type: 'boolean',
description: 'Check for hard-coded font weight values',
default: true,
},
checkTransitions: {
type: 'boolean',
description: 'Check for hard-coded transition and animation values',
default: true,
},
allowedValues: {
type: 'array',
items: {
type: 'string',
},
description: 'Array of values that are allowed (e.g., "0", "auto", "100%")',
},
allowedProperties: {
type: 'array',
items: {
type: 'string',
},
description: 'Array of CSS properties to skip checking (supports both camelCase and kebab-case)',
},
autoFix: {
type: 'boolean',
description: 'Enable auto-fix for unambiguous token replacements',
default: false,
},
remBase: {
type: 'number',
description: 'Base font size for rem() calculations (default: 16)',
default: 16,
},
checkHelperFunctions: {
type: 'boolean',
description: 'Check helper function calls like rem(48) and suggest theme tokens (default: false)',
default: false,
},
},
additionalProperties: false,
},
],
messages: {
hardCodedValueWithToken: "Hard-coded {{property}} value '{{value}}' detected. Use theme token: {{tokenPath}}",
hardCodedValueGeneric:
"Hard-coded {{property}} value '{{value}}' detected. Consider using a theme token from {{categoryHint}}",
hardCodedValueNoContract:
"Hard-coded {{property}} value '{{value}}' detected. Consider using theme tokens for {{category}} values",
replaceWithToken: 'Replace with {{tokenPath}}',
},
},
create(context: Rule.RuleContext): Rule.RuleListener {
const options: ThemeTokenOptions = context.options[0] || {};
return createThemeTokenVisitors(context, options);
},
};
export default rule;

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import * as fs from 'fs';
import * as path from 'path';
import { ValueEvaluator } from './value-evaluator.js';
export interface TokenInfo {
value: string;
tokenPath: string;
category: 'color' | 'spacing' | 'fontSize' | 'borderRadius' | 'borderWidth' | 'shadow' | 'zIndex' | 'opacity' | 'fontWeight' | 'transition' | 'other';
}
export interface ThemeContract {
tokens: Map<string, TokenInfo[]>; // value -> token infos
variableName: string; // e.g., 'theme', 'vars'
}
/**
* Analyzes theme contract files to extract token values and their paths
*/
export class ThemeContractAnalyzer {
private contracts: Map<string, ThemeContract> = new Map();
private evaluator: ValueEvaluator = new ValueEvaluator();
/**
* Set rem base for evaluation (default: 16)
*/
setRemBase(base: number): void {
this.evaluator.setRemBase(base);
}
/**
* Load and analyze a theme contract file
*/
loadThemeContract(filePath: string, baseDir: string): void {
const absolutePath = path.resolve(baseDir, filePath);
if (!fs.existsSync(absolutePath)) {
return;
}
try {
const content = fs.readFileSync(absolutePath, 'utf-8');
const contract = this.parseThemeContract(content);
if (contract) {
this.contracts.set(filePath, contract);
}
} catch {
// Silently fail - theme file might not be available during linting
}
}
/**
* Parse theme contract from source code
*/
private parseThemeContract(content: string): ThemeContract | null {
const tokens = new Map<string, TokenInfo[]>();
let variableName = 'theme';
// Try to extract theme variable name from exports
// Prefer the second identifier in destructuring like: export const [themeClass, vars] = createTheme(...)
const destructureMatch = content.match(/export\s+(?:const|let)\s*\[\s*(\w+)\s*,\s*(\w+)\s*\]\s*=/);
if (destructureMatch?.[2]) {
variableName = destructureMatch[2];
} else {
// Fallback: capture single identifier export
const exportMatch = content.match(/export\s+(?:const|let)\s+(\w+)\s*=|export\s+(?:const|let)\s*\[\s*(\w+)\s*\]/);
const candidate = exportMatch?.[1] || exportMatch?.[2];
if (candidate) {
variableName = candidate;
}
}
// Parse createTheme (one-arg), createTheme(contract, values), createGlobalTheme, or contract definitions
const createThemeTwoArg = content.match(/createTheme\s*\(\s*([A-Za-z_$][\w$]*)\s*,\s*({[\s\S]*?})\s*\)/);
const themeObjectMatch = content.match(/createTheme\s*\(\s*({[\s\S]*?})\s*\)/);
const globalThemeMatch = content.match(/createGlobalTheme\s*\([^,]+,\s*({[\s\S]*?})\s*\)/);
const contractMatch = content.match(/createThemeContract\s*\(\s*({[\s\S]*?})\s*\)/);
const themeContent = createThemeTwoArg?.[2] || themeObjectMatch?.[1] || globalThemeMatch?.[1] || contractMatch?.[1];
if (!themeContent) {
return null;
}
// If using createTheme(contractIdentifier, values), prefer the contract identifier for variable name (e.g., 'theme')
if (createThemeTwoArg?.[1]) {
variableName = createThemeTwoArg[1];
} else {
// Try to extract theme variable name from exports
// Prefer the second identifier in destructuring like: export const [themeClass, vars] = createTheme(...)
const destructureMatch = content.match(/export\s+(?:const|let)\s*\[\s*(\w+)\s*,\s*(\w+)\s*\]\s*=/);
if (destructureMatch?.[2]) {
variableName = destructureMatch[2];
} else {
// Fallback: capture single identifier export
const exportMatch = content.match(/export\s+(?:const|let)\s+(\w+)\s*=|export\s+(?:const|let)\s*\[\s*(\w+)\s*\]/);
const candidate = exportMatch?.[1] || exportMatch?.[2];
if (candidate) {
variableName = candidate;
}
}
}
// Parse the theme object structure
this.parseThemeObject(themeContent, variableName, tokens);
return { tokens, variableName };
}
/**
* Parse theme object and extract token values
*/
private parseThemeObject(
content: string,
variableName: string,
tokens: Map<string, TokenInfo[]>,
pathPrefix: string = '',
): void {
// Remove comments
const cleaned = content.replace(/\/\/.*$/gm, '').replace(/\/\*[\s\S]*?\*\//g, '');
// First, extract and process nested objects to avoid matching their contents
const objectRegex = /['"]?(\w+)['"]?\s*:\s*{([^{}]*(?:{[^{}]*}[^{}]*)*?)}/g;
const nestedObjects: Array<{ key: string; content: string }> = [];
let objectMatch;
while ((objectMatch = objectRegex.exec(cleaned)) !== null) {
const key = objectMatch[1];
const nestedContent = objectMatch[2];
if (key && nestedContent) {
nestedObjects.push({ key, content: nestedContent });
}
}
// Remove nested objects from content to avoid double-matching
let contentWithoutNested = cleaned;
nestedObjects.forEach(({ content }) => {
contentWithoutNested = contentWithoutNested.replace(content, '');
});
// Match key-value pairs - both string literals and expressions
// String literals: key: 'value' or key: "value" or key: `value`
const stringLiteralRegex = /['"]?(\w+)['"]?\s*:\s*(['"`])(.*?)\2/g;
// Expressions: key: rem(16) or key: clsx(...)
const expressionRegex = /['"]?(\w+)['"]?\s*:\s*([^,}\n]+?)(?=[,}\n])/g;
let match;
// First pass: extract string literals (only from content without nested objects)
while ((match = stringLiteralRegex.exec(contentWithoutNested)) !== null) {
const key = match[1];
const value = match[3];
if (!key || !value) continue;
const tokenPath = pathPrefix ? `${pathPrefix}.${key}` : key;
const fullPath = `${variableName}.${tokenPath}`;
// Determine category based on key name and value
const category = this.categorizeToken(tokenPath, value);
// Normalize the value
const normalizedValue = this.normalizeValue(value);
if (normalizedValue) {
const existing = tokens.get(normalizedValue) || [];
existing.push({ value: normalizedValue, tokenPath: fullPath, category });
tokens.set(normalizedValue, existing);
}
}
// Second pass: extract and evaluate expressions (only from content without nested objects)
let exprMatch;
while ((exprMatch = expressionRegex.exec(contentWithoutNested)) !== null) {
const key = exprMatch[1];
let value = exprMatch[2];
if (!key || !value) continue;
value = value.trim();
// Skip if it's a string literal (already processed)
if (value.startsWith('"') || value.startsWith("'") || value.startsWith('`')) {
continue;
}
// Skip nested objects
if (value.startsWith('{')) {
continue;
}
const tokenPath = pathPrefix ? `${pathPrefix}.${key}` : key;
const fullPath = `${variableName}.${tokenPath}`;
// Try to evaluate the expression
const evaluatedValue = this.evaluator.evaluate(value);
if (!evaluatedValue) continue;
// Determine category based on key name and evaluated value
const category = this.categorizeToken(tokenPath, evaluatedValue);
// Normalize the evaluated value
const normalizedValue = this.normalizeValue(evaluatedValue);
if (normalizedValue) {
const existing = tokens.get(normalizedValue) || [];
existing.push({ value: normalizedValue, tokenPath: fullPath, category });
tokens.set(normalizedValue, existing);
}
}
// Process nested objects (already extracted earlier)
nestedObjects.forEach(({ key, content }) => {
const newPrefix = pathPrefix ? `${pathPrefix}.${key}` : key;
this.parseThemeObject(content, variableName, tokens, newPrefix);
});
}
/**
* Categorize a token based on its path and value
*/
private categorizeToken(tokenPath: string, value: string): TokenInfo['category'] {
const lowerPath = tokenPath.toLowerCase();
// Check by path
if (lowerPath.includes('color') || lowerPath.includes('bg') || lowerPath.includes('background')) {
return 'color';
}
if (lowerPath.includes('spacing') || lowerPath.includes('space') || lowerPath.includes('gap')) {
return 'spacing';
}
if (lowerPath.includes('fontsize') || lowerPath.includes('font') && lowerPath.includes('size')) {
return 'fontSize';
}
if (lowerPath.includes('radius') || lowerPath.includes('radii')) {
return 'borderRadius';
}
if (lowerPath.includes('borderwidth') || lowerPath.includes('border') && lowerPath.includes('width')) {
return 'borderWidth';
}
if (lowerPath.includes('shadow')) {
return 'shadow';
}
if (lowerPath.includes('zindex') || lowerPath.includes('z-index') || lowerPath.includes('z')) {
return 'zIndex';
}
if (lowerPath.includes('opacity')) {
return 'opacity';
}
if (lowerPath.includes('fontweight') || lowerPath.includes('font') && lowerPath.includes('weight') || lowerPath.includes('weight')) {
return 'fontWeight';
}
if (lowerPath.includes('transition') || lowerPath.includes('animation') || lowerPath.includes('duration') || lowerPath.includes('delay')) {
return 'transition';
}
// Check by value pattern
if (this.isColor(value)) {
return 'color';
}
if (/^\d+(\.\d+)?(px|rem|em)$/.test(value)) {
if (/font|size/.test(lowerPath)) {
return 'fontSize';
}
if (/radius/.test(lowerPath)) {
return 'borderRadius';
}
if (/border.*width|width/.test(lowerPath)) {
return 'borderWidth';
}
return 'spacing';
}
if (/^-?\d+$/.test(value)) {
return 'zIndex';
}
if (/^(0?\.\d+|1(\.0+)?)$/.test(value)) {
return 'opacity';
}
if (/^[1-9]00$/.test(value) || /^(normal|bold|bolder|lighter)$/i.test(value)) {
return 'fontWeight';
}
if (/^\d+(\.\d+)?(s|ms)$/.test(value) || /(ease|linear|cubic-bezier|steps)/i.test(value)) {
return 'transition';
}
return 'other';
}
/**
* Check if a value is a color
*/
private isColor(value: string): boolean {
return /^#[0-9a-f]{3,8}$/i.test(value) ||
/^rgba?\(/.test(value) ||
/^hsla?\(/.test(value);
}
/**
* Normalize a value for comparison
*/
private normalizeValue(value: string): string | null {
const trimmed = value.trim();
// Normalize hex colors
if (/^#[0-9a-f]{3}$/i.test(trimmed)) {
// Expand 3-digit hex to 6-digit
const r = trimmed[1];
const g = trimmed[2];
const b = trimmed[3];
return `#${r}${r}${g}${g}${b}${b}`.toLowerCase();
}
if (/^#[0-9a-f]{6}$/i.test(trimmed)) {
return trimmed.toLowerCase();
}
// Normalize RGB/RGBA
const rgbMatch = trimmed.match(/^rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)(?:\s*,\s*([\d.]+))?\s*\)$/i);
if (rgbMatch?.[1] && rgbMatch[2] && rgbMatch[3]) {
const r = parseInt(rgbMatch[1]);
const g = parseInt(rgbMatch[2]);
const b = parseInt(rgbMatch[3]);
const a = rgbMatch[4];
if (a && a !== '1') {
return `rgba(${r}, ${g}, ${b}, ${a})`;
}
return `rgb(${r}, ${g}, ${b})`;
}
// Normalize spacing values
const spacingMatch = trimmed.match(/^(\d+(\.\d+)?)(px|rem|em|%)$/);
if (spacingMatch) {
return trimmed;
}
// Return as-is for other values
return trimmed || null;
}
/**
* Find matching tokens for a given value and category
*/
findMatchingTokens(value: string, category?: TokenInfo['category']): TokenInfo[] {
const normalized = this.normalizeValue(value);
if (!normalized) {
return [];
}
const allMatches: TokenInfo[] = [];
for (const contract of this.contracts.values()) {
const matches = contract.tokens.get(normalized) || [];
allMatches.push(...matches);
}
// Filter by category if specified
if (category) {
return allMatches.filter((token) => token.category === category);
}
return allMatches;
}
/**
* Get the primary variable name from loaded contracts
*/
getVariableName(): string {
const firstContract = Array.from(this.contracts.values())[0];
return firstContract?.variableName || 'theme';
}
/**
* Check if any contracts are loaded
*/
hasContracts(): boolean {
return this.contracts.size > 0;
}
/**
* Clear all loaded contracts
*/
clear(): void {
this.contracts.clear();
}
}

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import type { Rule } from 'eslint';
import { AST_NODE_TYPES, TSESTree } from '@typescript-eslint/utils';
import { ValueEvaluator } from './value-evaluator.js';
import type { ThemeContractAnalyzer, TokenInfo } from './theme-contract-analyzer.js';
export interface ThemeTokenOptions {
themeContracts?: string[];
checkColors?: boolean;
checkSpacing?: boolean;
checkFontSizes?: boolean;
checkBorderRadius?: boolean;
checkBorderWidths?: boolean;
checkShadows?: boolean;
checkZIndex?: boolean;
checkOpacity?: boolean;
checkFontWeights?: boolean;
checkTransitions?: boolean;
allowedValues?: string[];
allowedProperties?: string[];
autoFix?: boolean;
remBase?: number;
checkHelperFunctions?: boolean;
}
// Color detection patterns
const HEX_COLOR = /^#([0-9a-f]{3}|[0-9a-f]{6}|[0-9a-f]{8})$/i;
const RGB_COLOR = /^rgba?\s*\(/i;
const HSL_COLOR = /^hsla?\s*\(/i;
const NAMED_COLORS = new Set([
'black',
'white',
'red',
'green',
'blue',
'yellow',
'orange',
'purple',
'pink',
'gray',
'grey',
'brown',
'cyan',
'magenta',
'lime',
'navy',
'teal',
'olive',
'maroon',
'aqua',
'fuchsia',
'silver',
'gold',
'indigo',
'violet',
'tan',
]);
// CSS keywords that should be allowed
const ALLOWED_KEYWORDS = new Set(['transparent', 'currentcolor', 'inherit', 'initial', 'unset', 'revert']);
// Spacing-related properties
const SPACING_PROPERTIES = new Set([
'margin',
'marginTop',
'marginRight',
'marginBottom',
'marginLeft',
'marginBlock',
'marginBlockStart',
'marginBlockEnd',
'marginInline',
'marginInlineStart',
'marginInlineEnd',
'padding',
'paddingTop',
'paddingRight',
'paddingBottom',
'paddingLeft',
'paddingBlock',
'paddingBlockStart',
'paddingBlockEnd',
'paddingInline',
'paddingInlineStart',
'paddingInlineEnd',
'gap',
'rowGap',
'columnGap',
'gridGap',
'gridRowGap',
'gridColumnGap',
'inset',
'insetBlock',
'insetBlockStart',
'insetBlockEnd',
'insetInline',
'insetInlineStart',
'insetInlineEnd',
'top',
'right',
'bottom',
'left',
'width',
'height',
'minWidth',
'minHeight',
'maxWidth',
'maxHeight',
'blockSize',
'inlineSize',
'minBlockSize',
'minInlineSize',
'maxBlockSize',
'maxInlineSize',
]);
// Font size properties
const FONT_SIZE_PROPERTIES = new Set(['fontSize', 'lineHeight']);
// Border radius properties
const BORDER_RADIUS_PROPERTIES = new Set([
'borderRadius',
'borderTopLeftRadius',
'borderTopRightRadius',
'borderBottomLeftRadius',
'borderBottomRightRadius',
'borderStartStartRadius',
'borderStartEndRadius',
'borderEndStartRadius',
'borderEndRadius',
]);
// Border width properties
const BORDER_WIDTH_PROPERTIES = new Set([
'borderWidth',
'borderTopWidth',
'borderRightWidth',
'borderBottomWidth',
'borderLeftWidth',
'borderBlockWidth',
'borderBlockStartWidth',
'borderBlockEndWidth',
'borderInlineWidth',
'borderInlineStartWidth',
'borderInlineEndWidth',
'outlineWidth',
'columnRuleWidth',
// Shorthands that include width
'border',
'borderTop',
'borderRight',
'borderBottom',
'borderLeft',
'borderBlock',
'borderBlockStart',
'borderBlockEnd',
'borderInline',
'borderInlineStart',
'borderInlineEnd',
'outline',
]);
// Shadow properties
const SHADOW_PROPERTIES = new Set(['boxShadow', 'textShadow', 'filter', 'backdropFilter']);
// Z-index property
const Z_INDEX_PROPERTIES = new Set(['zIndex']);
// Opacity property
const OPACITY_PROPERTIES = new Set(['opacity']);
// Font weight properties
const FONT_WEIGHT_PROPERTIES = new Set(['fontWeight']);
// Transition and animation properties
const TRANSITION_PROPERTIES = new Set([
'transition',
'transitionDelay',
'transitionDuration',
'transitionTimingFunction',
'animation',
'animationDelay',
'animationDuration',
'animationTimingFunction',
]);
// Color properties
const COLOR_PROPERTIES = new Set([
'color',
'backgroundColor',
'borderColor',
'borderTopColor',
'borderRightColor',
'borderBottomColor',
'borderLeftColor',
'borderBlockStartColor',
'borderBlockEndColor',
'borderInlineStartColor',
'borderInlineEndColor',
'outlineColor',
'textDecorationColor',
'caretColor',
'columnRuleColor',
'fill',
'stroke',
]);
const isHardCodedColor = (value: string): boolean => {
if (ALLOWED_KEYWORDS.has(value.toLowerCase())) {
return false;
}
return (
HEX_COLOR.test(value) || RGB_COLOR.test(value) || HSL_COLOR.test(value) || NAMED_COLORS.has(value.toLowerCase())
);
};
const hasNumericValue = (value: string): boolean => {
// Match numeric values with units (e.g., 10px, 1rem, 2em, 50%, etc.)
return /\d+(\.\d+)?(px|rem|em|%|vh|vw|vmin|vmax|ch|ex)/.test(value);
};
const hasShadowValue = (value: string): boolean => {
// Match shadow values (e.g., "0 4px 6px rgba(...)", "inset 0 1px 2px #000")
// Also matches filter functions like blur(), drop-shadow()
return /(\d+px|\d+rem|rgba?\(|hsla?\(|#[0-9a-f]{3,8}|blur\(|drop-shadow\(|brightness\(|contrast\()/.test(
value.toLowerCase(),
);
};
const hasZIndexValue = (value: string): boolean => {
// Match numeric z-index values
return /^-?\d+$/.test(value.trim());
};
const hasOpacityValue = (value: string): boolean => {
// Match opacity values (0-1 or percentages)
return /^(0?\.\d+|1(\.0+)?|\d+%)$/.test(value.trim());
};
const hasFontWeightValue = (value: string): boolean => {
// Match font weight values (numeric or named)
const namedWeights = ['normal', 'bold', 'bolder', 'lighter'];
const trimmed = value.trim().toLowerCase();
return /^[1-9]00$/.test(trimmed) || namedWeights.includes(trimmed);
};
const hasTransitionValue = (value: string): boolean => {
// Match transition/animation values (e.g., "0.3s", "200ms", "ease-in-out", "cubic-bezier(...)")
return /(^\d+(\.\d+)?(s|ms)$|ease|linear|cubic-bezier\(|steps\()/.test(value.toLowerCase());
};
const isAllowedValue = (value: string, allowedValues: Set<string>): boolean => {
const trimmed = value.trim();
return (
allowedValues.has(trimmed) ||
allowedValues.has(trimmed.toLowerCase()) ||
trimmed === '0' ||
trimmed === 'auto' ||
trimmed === 'none' ||
trimmed === 'inherit' ||
trimmed === 'initial' ||
trimmed === 'unset' ||
/^\d+(\.\d+)?%$/.test(trimmed)
); // Allow percentages
};
const normalizePropertyName = (name: string): string => {
// Convert kebab-case to camelCase
return name.replace(/-([a-z])/g, (_, letter: string) => letter.toUpperCase());
};
/**
* Recursively processes a vanilla-extract style object and reports hard-coded values
* that should use theme tokens instead.
*/
export const processThemeTokensInStyleObject = (
context: Rule.RuleContext,
node: TSESTree.ObjectExpression,
options: ThemeTokenOptions,
analyzer: ThemeContractAnalyzer,
): void => {
const {
checkColors = true,
checkSpacing = true,
checkFontSizes = true,
checkBorderRadius = true,
checkBorderWidths = true,
checkShadows = true,
checkZIndex = true,
checkOpacity = true,
checkFontWeights = true,
checkTransitions = true,
allowedValues = [],
allowedProperties = [],
autoFix = false,
checkHelperFunctions = false,
} = options;
const evaluator = new ValueEvaluator();
const allowedValuesSet = new Set(allowedValues);
const allowedPropertiesSet = new Set([...allowedProperties.map(normalizePropertyName), ...allowedProperties]);
for (const property of node.properties) {
if (property.type !== AST_NODE_TYPES.Property) continue;
// Determine property name
let propertyName: string | null = null;
if (property.key.type === AST_NODE_TYPES.Identifier) {
propertyName = property.key.name;
} else if (property.key.type === AST_NODE_TYPES.Literal && typeof property.key.value === 'string') {
propertyName = property.key.value;
}
// Recurse into nested containers (@media, selectors, etc.)
if (propertyName && (propertyName === '@media' || propertyName === 'selectors' || propertyName.startsWith('@'))) {
if (property.value.type === AST_NODE_TYPES.ObjectExpression) {
for (const nestedProp of property.value.properties) {
if (
nestedProp.type === AST_NODE_TYPES.Property &&
nestedProp.value.type === AST_NODE_TYPES.ObjectExpression
) {
processThemeTokensInStyleObject(context, nestedProp.value, options, analyzer);
}
}
}
continue;
}
if (!propertyName) continue;
// Skip if property is in allowed list
if (allowedPropertiesSet.has(propertyName) || allowedPropertiesSet.has(normalizePropertyName(propertyName))) {
continue;
}
// Check if property value is a literal (string or number)
if (
property.value.type === AST_NODE_TYPES.Literal &&
(typeof property.value.value === 'string' || typeof property.value.value === 'number')
) {
const value = String(property.value.value);
// Skip if value is in allowed list
if (isAllowedValue(value, allowedValuesSet)) {
continue;
}
// Check for hard-coded colors
if (checkColors && COLOR_PROPERTIES.has(propertyName) && isHardCodedColor(value)) {
reportHardCodedValue(context, property.value, value, 'color', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded spacing
if (checkSpacing && SPACING_PROPERTIES.has(propertyName) && hasNumericValue(value)) {
reportHardCodedValue(context, property.value, value, 'spacing', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font sizes
if (checkFontSizes && FONT_SIZE_PROPERTIES.has(propertyName) && hasNumericValue(value)) {
reportHardCodedValue(context, property.value, value, 'fontSize', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded border radius
if (checkBorderRadius && BORDER_RADIUS_PROPERTIES.has(propertyName) && hasNumericValue(value)) {
reportHardCodedValue(context, property.value, value, 'borderRadius', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded border widths
if (checkBorderWidths && BORDER_WIDTH_PROPERTIES.has(propertyName) && hasNumericValue(value)) {
reportHardCodedValue(context, property.value, value, 'borderWidth', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded shadows
if (checkShadows && SHADOW_PROPERTIES.has(propertyName) && hasShadowValue(value)) {
reportHardCodedValue(context, property.value, value, 'shadow', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded z-index
if (checkZIndex && Z_INDEX_PROPERTIES.has(propertyName) && hasZIndexValue(value)) {
reportHardCodedValue(context, property.value, value, 'zIndex', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded opacity
if (checkOpacity && OPACITY_PROPERTIES.has(propertyName) && hasOpacityValue(value)) {
reportHardCodedValue(context, property.value, value, 'opacity', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font weights
if (checkFontWeights && FONT_WEIGHT_PROPERTIES.has(propertyName) && hasFontWeightValue(value)) {
reportHardCodedValue(context, property.value, value, 'fontWeight', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded transitions
if (checkTransitions && TRANSITION_PROPERTIES.has(propertyName) && hasTransitionValue(value)) {
reportHardCodedValue(context, property.value, value, 'transition', propertyName, analyzer, autoFix);
}
}
// Check if property value is a TemplateLiteral (e.g., `${rem(4)} ${rem(8)}`)
if (checkHelperFunctions && property.value.type === AST_NODE_TYPES.TemplateLiteral) {
// Get the source code of the template literal
const sourceCode = context.sourceCode || context.getSourceCode();
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const templateText = sourceCode.getText(property.value as any);
// Try to evaluate it
const evaluatedValue = evaluator.evaluate(templateText);
if (evaluatedValue) {
// Check for hard-coded colors
if (checkColors && COLOR_PROPERTIES.has(propertyName) && isHardCodedColor(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'color', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded spacing
if (checkSpacing && SPACING_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'spacing', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font sizes
if (checkFontSizes && FONT_SIZE_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'fontSize', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded border radius
if (checkBorderRadius && BORDER_RADIUS_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(
context,
property.value,
evaluatedValue,
'borderRadius',
propertyName,
analyzer,
autoFix,
);
continue;
}
// Check for hard-coded border widths
if (checkBorderWidths && BORDER_WIDTH_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'borderWidth', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded shadows
if (checkShadows && SHADOW_PROPERTIES.has(propertyName) && hasShadowValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'shadow', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded z-index
if (checkZIndex && Z_INDEX_PROPERTIES.has(propertyName) && hasZIndexValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'zIndex', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded opacity
if (checkOpacity && OPACITY_PROPERTIES.has(propertyName) && hasOpacityValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'opacity', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font weights
if (checkFontWeights && FONT_WEIGHT_PROPERTIES.has(propertyName) && hasFontWeightValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'fontWeight', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded transitions
if (checkTransitions && TRANSITION_PROPERTIES.has(propertyName) && hasTransitionValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'transition', propertyName, analyzer, autoFix);
}
}
}
// Check if property value is a CallExpression (e.g., rem(48), clsx(...))
if (checkHelperFunctions && property.value.type === AST_NODE_TYPES.CallExpression) {
// Get the source code of the call expression
const sourceCode = context.sourceCode || context.getSourceCode();
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const callExpressionText = sourceCode.getText(property.value as any);
// Try to evaluate it
const evaluatedValue = evaluator.evaluate(callExpressionText);
if (evaluatedValue) {
// Check for hard-coded colors
if (checkColors && COLOR_PROPERTIES.has(propertyName) && isHardCodedColor(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'color', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded spacing
if (checkSpacing && SPACING_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'spacing', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font sizes
if (checkFontSizes && FONT_SIZE_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'fontSize', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded border radius
if (checkBorderRadius && BORDER_RADIUS_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(
context,
property.value,
evaluatedValue,
'borderRadius',
propertyName,
analyzer,
autoFix,
);
continue;
}
// Check for hard-coded border widths
if (checkBorderWidths && BORDER_WIDTH_PROPERTIES.has(propertyName) && hasNumericValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'borderWidth', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded shadows
if (checkShadows && SHADOW_PROPERTIES.has(propertyName) && hasShadowValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'shadow', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded z-index
if (checkZIndex && Z_INDEX_PROPERTIES.has(propertyName) && hasZIndexValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'zIndex', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded opacity
if (checkOpacity && OPACITY_PROPERTIES.has(propertyName) && hasOpacityValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'opacity', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded font weights
if (checkFontWeights && FONT_WEIGHT_PROPERTIES.has(propertyName) && hasFontWeightValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'fontWeight', propertyName, analyzer, autoFix);
continue;
}
// Check for hard-coded transitions
if (checkTransitions && TRANSITION_PROPERTIES.has(propertyName) && hasTransitionValue(evaluatedValue)) {
reportHardCodedValue(context, property.value, evaluatedValue, 'transition', propertyName, analyzer, autoFix);
}
}
}
// Recurse into nested objects
if (property.value.type === AST_NODE_TYPES.ObjectExpression) {
processThemeTokensInStyleObject(context, property.value, options, analyzer);
}
}
};
/**
* Report a hard-coded value and suggest theme tokens
*/
const reportHardCodedValue = (
context: Rule.RuleContext,
node: TSESTree.Literal | TSESTree.CallExpression | TSESTree.TemplateLiteral,
value: string,
category: TokenInfo['category'],
propertyName: string,
analyzer: ThemeContractAnalyzer,
autoFix: boolean,
): void => {
// Find matching tokens from the theme contract
const matchingTokens = analyzer.findMatchingTokens(value, category);
if (matchingTokens.length > 0) {
// We have exact matches - suggest the specific token(s)
const primaryToken = matchingTokens[0];
if (!primaryToken) return;
const tokenPath = primaryToken.tokenPath;
const suggestions: Rule.SuggestionReportDescriptor[] = matchingTokens.map((token) => ({
messageId: 'replaceWithToken',
data: { tokenPath: token.tokenPath },
fix: (fixer) => fixer.replaceText(node as unknown as Rule.Node, token.tokenPath),
}));
const reportDescriptor: Rule.ReportDescriptor = {
node: node as unknown as Rule.Node,
messageId: 'hardCodedValueWithToken',
data: {
value,
property: propertyName,
tokenPath,
},
suggest: suggestions,
};
// Add fix if autoFix is enabled
// Only auto-fix when there's exactly one match (unambiguous)
// For multiple matches, user must manually select from suggestions
if (autoFix && matchingTokens.length === 1) {
reportDescriptor.fix = (fixer) => fixer.replaceText(node as unknown as Rule.Node, tokenPath);
}
context.report(reportDescriptor);
} else if (analyzer.hasContracts()) {
// Theme contract exists but no exact match - give generic suggestion
const categoryHint = getCategoryHint(category, analyzer.getVariableName());
context.report({
node: node as unknown as Rule.Node,
messageId: 'hardCodedValueGeneric',
data: {
value,
property: propertyName,
categoryHint,
},
});
} else {
// No theme contract loaded - give very generic message
context.report({
node: node as unknown as Rule.Node,
messageId: 'hardCodedValueNoContract',
data: {
value,
property: propertyName,
category: getCategoryName(category),
},
});
}
};
/**
* Get a helpful hint for the category
*/
const getCategoryHint = (category: TokenInfo['category'], variableName: string): string => {
switch (category) {
case 'color':
return `${variableName}.colors.*`;
case 'spacing':
return `${variableName}.spacing.*`;
case 'fontSize':
return `${variableName}.fontSizes.*`;
case 'borderRadius':
return `${variableName}.radii.*`;
case 'borderWidth':
return `${variableName}.borderWidths.*`;
case 'shadow':
return `${variableName}.shadows.*`;
case 'zIndex':
return `${variableName}.zIndex.*`;
case 'opacity':
return `${variableName}.opacity.*`;
case 'fontWeight':
return `${variableName}.fontWeights.*`;
case 'transition':
return `${variableName}.transitions.*`;
default:
return `${variableName}.*`;
}
};
/**
* Get a readable category name
*/
const getCategoryName = (category: TokenInfo['category']): string => {
switch (category) {
case 'color':
return 'color';
case 'spacing':
return 'spacing';
case 'fontSize':
return 'font size';
case 'borderRadius':
return 'border radius';
case 'borderWidth':
return 'border width';
case 'shadow':
return 'shadow';
case 'zIndex':
return 'z-index';
case 'opacity':
return 'opacity';
case 'fontWeight':
return 'font weight';
case 'transition':
return 'transition';
default:
return 'value';
}
};

96
src/css-rules/prefer-theme-tokens/theme-token-visitor-creator.ts Normal file
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@ -0,0 +1,96 @@
import * as path from 'path';
import type { Rule } from 'eslint';
import { AST_NODE_TYPES, TSESTree } from '@typescript-eslint/utils';
import { processRecipeProperties } from '../shared-utils/recipe-property-processor.js';
import { ReferenceTracker, createReferenceTrackingVisitor } from '../shared-utils/reference-tracker.js';
import { processStyleNode } from '../shared-utils/style-node-processor.js';
import { ThemeContractAnalyzer } from './theme-contract-analyzer.js';
import { processThemeTokensInStyleObject, type ThemeTokenOptions } from './theme-token-processor.js';
/**
* Creates ESLint rule visitors for the prefer-theme-tokens rule
*/
export const createThemeTokenVisitors = (context: Rule.RuleContext, options: ThemeTokenOptions): Rule.RuleListener => {
const tracker = new ReferenceTracker();
const trackingVisitor = createReferenceTrackingVisitor(tracker);
// Initialize the theme contract analyzer
const analyzer = new ThemeContractAnalyzer();
// Set rem base if provided
if (options.remBase) {
analyzer.setRemBase(options.remBase);
}
// Load theme contracts if provided
const themeContracts = options.themeContracts || [];
if (themeContracts.length > 0) {
// Use getCwd() to get project root, or fallback to linted file's directory
const baseDir = context.getCwd ? context.getCwd() : path.dirname(context.filename || context.getFilename());
themeContracts.forEach((contractPath: string) => {
analyzer.loadThemeContract(contractPath, baseDir);
});
}
const process = (context: Rule.RuleContext, object: TSESTree.ObjectExpression) =>
processThemeTokensInStyleObject(context, object, options, analyzer);
return {
...trackingVisitor,
// Call the tracking visitor's ImportDeclaration handler
ImportDeclaration(node) {
if (trackingVisitor.ImportDeclaration) {
trackingVisitor.ImportDeclaration(node);
}
},
CallExpression(node) {
if (node.callee.type !== AST_NODE_TYPES.Identifier) return;
const functionName = node.callee.name;
if (!tracker.isTrackedFunction(functionName)) return;
const originalName = tracker.getOriginalName(functionName);
if (!originalName) return;
switch (originalName) {
case 'fontFace':
if (node.arguments.length > 0 && node.arguments[0]?.type === AST_NODE_TYPES.ObjectExpression) {
process(context, node.arguments[0] as TSESTree.ObjectExpression);
}
break;
case 'globalFontFace':
if (node.arguments.length > 1 && node.arguments[1]?.type === AST_NODE_TYPES.ObjectExpression) {
process(context, node.arguments[1] as TSESTree.ObjectExpression);
}
break;
case 'style':
case 'styleVariants':
case 'keyframes':
if (node.arguments.length > 0) {
processStyleNode(context, node.arguments[0] as TSESTree.Node, (context, object) =>
process(context, object),
);
}
break;
case 'globalStyle':
if (node.arguments.length > 1 && node.arguments[1]?.type === AST_NODE_TYPES.ObjectExpression) {
process(context, node.arguments[1] as TSESTree.ObjectExpression);
}
break;
case 'recipe':
case 'compoundVariant':
if (node.arguments.length > 0 && node.arguments[0]?.type === AST_NODE_TYPES.ObjectExpression) {
processRecipeProperties(context, node.arguments[0] as TSESTree.ObjectExpression, (context, object) =>
process(context, object),
);
}
break;
default:
break;
}
},
};
};

227
src/css-rules/prefer-theme-tokens/value-evaluator.ts Normal file
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@ -0,0 +1,227 @@
import { parseExpression } from '@babel/parser';
import type {
Expression,
SpreadElement,
PrivateName,
TemplateLiteral,
CallExpression,
BinaryExpression,
} from '@babel/types';
/**
* Safe evaluator for static theme values with support for:
* - rem() from polished
* - clsx() for combining values
* - Template literals with expressions
* - Basic arithmetic
*/
export class ValueEvaluator {
private remBase: number;
constructor(remBase: number = 16) {
this.remBase = remBase;
}
/**
* Evaluate a string expression to a concrete value
*/
evaluate(expression: string): string | null {
try {
const ast = parseExpression(expression, {
sourceType: 'module',
plugins: ['typescript'],
});
return this.evaluateNode(ast);
} catch {
// If parsing fails, return the original expression if it's a simple string
const trimmed = expression.trim();
if (
(trimmed.startsWith("'") && trimmed.endsWith("'")) ||
(trimmed.startsWith('"') && trimmed.endsWith('"')) ||
(trimmed.startsWith('`') && trimmed.endsWith('`'))
) {
return trimmed.slice(1, -1);
}
return null;
}
}
/**
* Evaluate an AST node
*/
private evaluateNode(node: Expression | SpreadElement | PrivateName | null): string | null {
if (!node) return null;
switch (node.type) {
case 'StringLiteral':
return node.value;
case 'NumericLiteral':
return String(node.value);
case 'TemplateLiteral':
return this.evaluateTemplateLiteral(node);
case 'CallExpression':
return this.evaluateCallExpression(node);
case 'BinaryExpression':
return this.evaluateBinaryExpression(node);
case 'Identifier':
// Only allow known safe identifiers
return null;
case 'MemberExpression':
// Don't evaluate member expressions for security
return null;
default:
return null;
}
}
/**
* Evaluate a template literal
*/
private evaluateTemplateLiteral(node: TemplateLiteral): string | null {
const parts: string[] = [];
for (let i = 0; i < node.quasis.length; i++) {
// Add the string part
const quasi = node.quasis[i];
if (!quasi) continue;
parts.push(quasi.value.cooked || quasi.value.raw);
// Add the expression part if it exists
if (i < node.expressions.length) {
const exprValue = this.evaluateNode(node.expressions[i] as Expression);
if (exprValue === null) {
return null; // Can't evaluate this expression
}
parts.push(exprValue);
}
}
return parts.join('');
}
/**
* Evaluate a call expression (rem, clsx, etc.)
*/
private evaluateCallExpression(node: CallExpression): string | null {
// Get function name
let functionName: string | null = null;
if (node.callee.type === 'Identifier') {
functionName = node.callee.name;
} else if (node.callee.type === 'MemberExpression' &&
node.callee.property.type === 'Identifier') {
functionName = node.callee.property.name;
}
if (!functionName) return null;
switch (functionName) {
case 'rem':
return this.evaluateRem(node);
case 'clsx':
return this.evaluateClsx(node);
default:
return null;
}
}
/**
* Evaluate rem() function from polished
*/
private evaluateRem(node: CallExpression): string | null {
if (node.arguments.length === 0) return null;
const arg = node.arguments[0];
if (!arg || arg.type === 'SpreadElement') return null;
const value = this.evaluateNode(arg as Expression);
if (value === null) return null;
const numValue = parseFloat(value);
if (isNaN(numValue)) return null;
// Convert pixels to rem
const remValue = numValue / this.remBase;
return `${remValue}rem`;
}
/**
* Evaluate clsx() function
*/
private evaluateClsx(node: CallExpression): string | null {
const parts: string[] = [];
for (const arg of node.arguments) {
if (arg.type === 'SpreadElement') return null;
const value = this.evaluateNode(arg as Expression);
if (value === null) return null;
parts.push(value);
}
return parts.join(' ');
}
/**
* Evaluate binary expression (mainly for string concatenation)
*/
private evaluateBinaryExpression(node: BinaryExpression): string | null {
const left = this.evaluateNode(node.left);
const right = this.evaluateNode(node.right);
if (left === null || right === null) return null;
switch (node.operator) {
case '+':
// String concatenation or addition
const leftNum = parseFloat(left);
const rightNum = parseFloat(right);
if (!isNaN(leftNum) && !isNaN(rightNum)) {
return String(leftNum + rightNum);
}
return left + right;
case '-':
const leftNum2 = parseFloat(left);
const rightNum2 = parseFloat(right);
if (!isNaN(leftNum2) && !isNaN(rightNum2)) {
return String(leftNum2 - rightNum2);
}
return null;
case '*':
const leftNum3 = parseFloat(left);
const rightNum3 = parseFloat(right);
if (!isNaN(leftNum3) && !isNaN(rightNum3)) {
return String(leftNum3 * rightNum3);
}
return null;
case '/':
const leftNum4 = parseFloat(left);
const rightNum4 = parseFloat(right);
if (!isNaN(leftNum4) && !isNaN(rightNum4) && rightNum4 !== 0) {
return String(leftNum4 / rightNum4);
}
return null;
default:
return null;
}
}
/**
* Set rem base for evaluation
*/
setRemBase(base: number): void {
this.remBase = base;
}
}

4
src/index.ts
View file

@ -7,11 +7,12 @@ import noTrailingZeroRule from './css-rules/no-trailing-zero/rule-definition.js'
import noUnknownUnitRule from './css-rules/no-unknown-unit/rule-definition.js';
import noZeroUnitRule from './css-rules/no-zero-unit/rule-definition.js';
import preferLogicalPropertiesRule from './css-rules/prefer-logical-properties/index.js';
import preferThemeTokensRule from './css-rules/prefer-theme-tokens/index.js';
const vanillaExtract = {
meta: {
name: '@antebudimir/eslint-plugin-vanilla-extract',
version: '1.14.0',
version: '1.15.0',
},
rules: {
'alphabetical-order': alphabeticalOrderRule,
@ -23,6 +24,7 @@ const vanillaExtract = {
'no-unknown-unit': noUnknownUnitRule,
'no-zero-unit': noZeroUnitRule,
'prefer-logical-properties': preferLogicalPropertiesRule,
'prefer-theme-tokens': preferThemeTokensRule,
},
configs: {},
};