create plugin

Author: charliegerard

.gitignore

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+node_modules/
+.DS_Store

LICENSE

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+MIT License
+
+Copyright (c) 2021 - tailwindcss-first-line
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Tailwindcss plugin for :first-line
+
+This Tailwind plugin implements the [CSS :first-line pseudo-element](https://developer.mozilla.org/en-US/docs/Web/CSS/::first-line)
+
+## Installation
+
+```bash
+npm install tailwindcss-first-line
+```
+
+or
+
+```bash
+yarn add tailwindcss-first-line
+```
+
+## Usage
+
+```javascript
+// tailwind.config.js
+
+module.exports = {
+    ...
+    plugins: [
+        require('tailwindcss-first-line'),
+        ...
+    ]
+}
+```
+
+Then, add the `first-line` variant to each property you'd like to use it with.
+
+```javascript
+    textColor: [
+      'responsive',
+      'hover',
+      'focus',
+      'first-line',
+    ],
+```
+
+You can then use it by preprending `first-line:` to your classes, like `first-line:your-class`.
+
+For example, to change the color of the first line of a paragraph to white, you would write `first-line:text-white`.
+
+If you have a prefix set in your config (e.g. `tw`), you would use the following syntax: `first-line:tw-text-white`.
+
+**`:first-line` only applies to [block-level elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements#elements).**

index.js

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+const plugin = require("tailwindcss/plugin");
+
+module.exports = plugin(function ({ addVariant, e }) {
+  addVariant("first-line", ({ modifySelectors, separator }) => {
+    modifySelectors(({ className }) => {
+      const newClass = e(`first-line${separator}${className}`);
+      return `.${newClass}:first-line`;
+    });
+  });
+});

package.json

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+{
+  "name": "@netlify/tailwindcss-first-line",
+  "version": "1.0.0",
+  "description": "Tailwind plugin for the :first-line CSS pseudo-element",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/netlify/tailwindcss-first-line.git"
+  },
+  "devDependencies": {
+    "tailwindcss": "^2.0.3"
+  },
+  "author": "Netlify",
+  "contributors": [
+    "Charlie Gerard <[email protected]> (https://charliegerard.dev)"
+  ],
+  "bugs": {
+    "url": "https://github.com/netlify/tailwindcss-first-line/issues"
+  },
+  "homepage": "https://github.com/netlify/tailwindcss-first-line#readme",
+  "keywords": [
+    "CSS",
+    "netlify",
+    "Tailwind"
+  ],
+  "license": "MIT"
+}