feat(attributify-jsx): new transformer transformer-attributify-jsx (u…

…nocss#1334)


Co-authored-by: Anthony Fu <[email protected]>

alias.ts

@@ -23,6 +23,7 @@ export const alias: Record<string, string> = {
   '@unocss/transformer-directives': r('./packages/transformer-directives/src/'),
   '@unocss/transformer-variant-group': r('./packages/transformer-variant-group/src/'),
   '@unocss/transformer-compile-class': r('./packages/transformer-compile-class/src/'),
+  '@unocss/transformer-attributify-jsx': r('./packages/transformer-attributify-jsx/src/'),
   '@unocss/vite': r('./packages/vite/src/'),
   'unocss': r('./packages/unocss/src/'),
 }

interactive/package.json

@@ -3,10 +3,9 @@
   "type": "module",
   "private": true,
   "scripts": {
-    "build": "nuxi generate . && esno scripts/verify-build.ts",
-    "dev": "nuxi dev .",
+    "build": "nuxi prepare && esno scripts/prepare.ts && nuxi generate . && esno scripts/verify-build.ts",
+    "dev": "nuxi prepare && esno scripts/prepare.ts && nuxi dev .",
     "start": "node .output/server/index.mjs",
-    "postinstall": "esno scripts/prepare.ts",
     "fetch": "esno scripts/fetch.ts"
   },
   "devDependencies": {

packages/README.md

@@ -17,6 +17,7 @@
 | [@unocss/transformer-variant-group](./transformer-variant-group) | Transformer for Windi CSS's variant group feature | ✅ | No |
 | [@unocss/transformer-directives](./transformer-directives) | Transformer for CSS directives like `@apply` | ✅ | No |
 | [@unocss/transformer-compile-class](./transformer-compile-class) | Compile group of classes into one class | ✅ | No |
+| [@unocss/transformer-attributify-jsx](./transformer-attributify-jsx) | Support valueless attributify in JSX/TSX | ✅ | No |
 | [@unocss/extractor-pug](./extractor-pug) | Extractor for Pug | No | - |
 | [@unocss/autocomplete](./autocomplete) | Utils for autocomplete | No | - |
 | [@unocss/config](./config) | Configuration file loader | ✅ | - |

packages/preset-attributify/README.md

@@ -71,7 +71,7 @@ Can be written as
 
 In addition to Windi CSS's Attributify Mode, this presets also supports valueless attributes.
 
-For example, 
+For example,
 
 ```html
 <div class="m-2 rounded text-teal-400" />
@@ -83,6 +83,8 @@ now can be
 <div m-2 rounded text-teal-400 />
 ```
 
+> Note: If you are using JSX, `<div foo>` might be transformed to `<div foo={true}>` which will make the generate CSS from UnoCSS failed to match the attributes. To solve this, you might want to try [`transformer-attributify-jsx`](https://github.com/unocss/unocss/tree/main/packages/transformer-attributify-jsx) along with this preset.
+
 ### Properties Conflicts
 
 If the name of the attributes mode ever conflicts with the elements' or components' properties, you can add `un-` prefix to be specific to UnoCSS's attributify mode.

packages/preset-attributify/src/extractor.ts

@@ -9,7 +9,8 @@ const strippedPrefixes = [
 
 const splitterRE = /[\s'"`;]+/g
 const elementRE = /<\w(?=.*>)[\w:\.$-]*\s((?:['"`\{].*?['"`\}]|.*?)*?)>/gs
-const valuedAttributeRE = /([?]|(?!\d|-{2}|-\d)[a-zA-Z0-9\u00A0-\uFFFF-_:!%-]+)(?:=(["'])([^\2]*?)\2)?/g
+const valuedAttributeRE = /([?]|(?!\d|-{2}|-\d)[a-zA-Z0-9\u00A0-\uFFFF-_:!%-]+)(?:={?(["'])([^\2]*?)\2}?)?/g
+
 export const defaultIgnoreAttributes = ['placeholder']
 
 export const extractorAttributify = (options?: AttributifyOptions): Extractor => {

packages/transformer-attributify-jsx/README.md

@@ -0,0 +1,118 @@
+# @unocss/transformer-attributify-jsx
+
+<!-- @unocss-ignore -->
+
+Support [valueless attributify](https://github.com/unocss/unocss/tree/main/packages/preset-attributify#valueless-attributify) in JSX/TSX.
+
+```jsx
+export function Component() {
+  return (
+    <div text-red text-center text-5xl animate-bounce>
+      unocss
+    </div>
+  )
+}
+```
+
+Will be transformed to:
+
+```jsx
+export function Component() {
+  return (
+    <div text-red="" text-center="" text-5xl="" animate-bounce="">
+      unocss
+    </div>
+  )
+}
+```
+
+<details>
+<summary>Without this transformer</summary>
+
+JSX by default will treat valueless attributes as boolean attributes.
+
+```jsx
+export function Component() {
+  return (
+    <div text-red={true} text-center={true} text-5xl={true} animate-bounce={true}>
+      unocss
+    </div>
+  )
+}
+```
+
+</details>
+
+## Install
+
+```bash
+npm i -D @unocss/transformer-attributify-jsx
+```
+
+```ts
+// uno.config.js
+import { defineConfig, presetAttributify } from 'unocss'
+import transformerAttributifyJsx from '@unocss/transformer-attributify-jsx'
+
+export default defineConfig({
+  // ...
+  presets: [
+    // ...
+    presetAttributify()
+  ],
+  transformers: [
+    transformerAttributifyJsx(), // <--
+  ],
+})
+```
+
+## Caveats
+
+> ⚠️ The rules are almost the same as those of `preset-attributify`, but there are several precautions
+
+```html
+<div translate-x-100% /> <!-- cannot end with `%` -->
+
+<div hover:text-2xl /> <!-- cannot contain `:` -->
+
+<div translate-x-[100px] /> <!-- cannot contain `[` or `]` -->
+```
+
+Instead, you may want to use valued attributes instead:
+
+```html
+<div translate="x-100%" />
+
+<div hover="text-2xl" />
+
+<div translate="x-[100px]" />
+```
+
+## Blocklist
+
+This transformer will only transform attrubutes that are valid UnoCSS utilities.
+You can also `blocklist` bypass some attributes from been transformed.
+
+```js
+transformerAttributifyJsx({
+  blocklist: [/text-[a-zA-Z]*/, 'text-5xl']
+})
+```
+
+```jsx
+<div text-red text-center text-5xl animate-bounce>
+  unocss
+</div>
+```
+
+Will be compiled to:
+
+```html
+<div text-red text-center text-5xl animate-bounce="">
+  unocss
+</div>
+```
+
+## License
+
+MIT License &copy; 2022-PRESENT [Anthony Fu](https://github.com/antfu)

packages/transformer-attributify-jsx/build.config.ts

@@ -0,0 +1,15 @@
+import { defineBuildConfig } from 'unbuild'
+
+export default defineBuildConfig({
+  entries: [
+    'src/index',
+  ],
+  clean: true,
+  declaration: true,
+  externals: [
+    'magic-string',
+  ],
+  rollup: {
+    emitCJS: true,
+  },
+})

packages/transformer-attributify-jsx/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "@unocss/transformer-attributify-jsx",
+  "version": "0.0.1",
+  "description": "Support valueless attributify in JSX/TSX.",
+  "author": "Anthony Fu <[email protected]>",
+  "license": "MIT",
+  "funding": "https://github.com/sponsors/antfu",
+  "homepage": "https://github.com/unocss/unocss/tree/main/packages/transformer-attributify-jsx#readme",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/unocss/unocss.git",
+    "directory": "packages/transformer-attributify-jsx"
+  },
+  "bugs": {
+    "url": "https://github.com/unocss/unocss/issues"
+  },
+  "keywords": [
+    "unocss",
+    "unocss-transformer"
+  ],
+  "sideEffects": false,
+  "exports": {
+    ".": {
+      "require": "./dist/index.cjs",
+      "import": "./dist/index.mjs"
+    }
+  },
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "unbuild",
+    "stub": "unbuild --stub"
+  },
+  "dependencies": {
+    "@unocss/core": "workspace:*"
+  },
+  "devDependencies": {
+    "@rollup/pluginutils": "^4.2.1",
+    "magic-string": "^0.26.2"
+  }
+}

packages/transformer-attributify-jsx/src/index.ts

@@ -0,0 +1,81 @@
+import type { SourceCodeTransformer } from '@unocss/core'
+import { createFilter } from '@rollup/pluginutils'
+
+export type FilterPattern = ReadonlyArray<string | RegExp> | string | RegExp | null
+
+export interface TransformerAttributifyJsxOptions {
+  /**
+   * the list of attributes to ignore
+   * @default []
+   */
+  blocklist?: (string | RegExp)[]
+
+  /**
+   * Regex of modules to be included from processing
+   * @default [/\.[jt]sx$/, /\.mdx$/]
+   */
+  include?: FilterPattern
+
+  /**
+   * Regex of modules to exclude from processing
+   *
+   * @default []
+   */
+  exclude?: FilterPattern
+}
+
+const elementRE = /<!--[\s\S]*?-->|<(\/?)([a-zA-Z][-.:0-9_a-zA-Z]*)((?:\s+[^>]*?(?:(?:'[^']*')|(?:"[^"]*"))?)*)\s*(\/?)>/gs
+const attributeRE = /([a-zA-Z()#][\[?a-zA-Z0-9-_:()#%\]?]*)(?:\s*=\s*((?:'[^']*')|(?:"[^"]*")|\S+))?/g
+
+export default function transformerAttributifyJsx(options: TransformerAttributifyJsxOptions = {}): SourceCodeTransformer {
+  const {
+    blocklist = [],
+  } = options
+
+  const isBlocked = (matchedRule: string) => {
+    for (const blockedRule of blocklist) {
+      if (blockedRule instanceof RegExp) {
+        if (blockedRule.test(matchedRule))
+          return true
+      }
+      else if (matchedRule === blockedRule) {
+        return true
+      }
+    }
+
+    return false
+  }
+
+  const idFilter = createFilter(
+    options.include || [/\.[jt]sx$/, /\.mdx$/],
+    options.exclude || [],
+  )
+
+  return {
+    name: 'transformer-jsx',
+    enforce: 'pre',
+    idFilter,
+    async transform(code, _, { uno }) {
+      const tasks: Promise<void>[] = []
+
+      for (const item of Array.from(code.original.matchAll(elementRE))) {
+        for (const attr of item[3].matchAll(attributeRE)) {
+          const matchedRule = attr[0]
+          if (matchedRule.includes('=') || isBlocked(matchedRule))
+            continue
+
+          tasks.push(uno.parseToken(matchedRule).then((matched) => {
+            if (matched) {
+              const tag = item[2]
+              const startIdx = (item.index || 0) + (attr.index || 0) + tag.length + 1
+              const endIdx = startIdx + matchedRule.length
+              code.overwrite(startIdx, endIdx, `${matchedRule}=""`)
+            }
+          }))
+        }
+      }
+
+      await Promise.all(tasks)
+    },
+  }
+}

packages/unocss/package.json

@@ -116,6 +116,7 @@
     "@unocss/preset-web-fonts": "workspace:*",
     "@unocss/preset-wind": "workspace:*",
     "@unocss/reset": "workspace:*",
+    "@unocss/transformer-attributify-jsx": "workspace:*",
     "@unocss/transformer-compile-class": "workspace:*",
     "@unocss/transformer-directives": "workspace:*",
     "@unocss/transformer-variant-group": "workspace:*",

packages/unocss/src/index.ts

@@ -13,6 +13,7 @@ export { default as presetWind } from '@unocss/preset-wind'
 export { default as transformerDirectives } from '@unocss/transformer-directives'
 export { default as transformerVariantGroup } from '@unocss/transformer-variant-group'
 export { default as transformerCompileClass } from '@unocss/transformer-compile-class'
+export { default as transformerAttributifyJsx } from '@unocss/transformer-attributify-jsx'
 
 export function defineConfig<Theme extends {} = PresetUnoTheme>(config: UserConfig<Theme>) {
   return config