postcss-reduce-initial
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Comparing version
@@ -0,1 +1,12 @@ | ||
# 4.0.0-rc.0 | ||
* Breaking: Drops support for Node 0.12, we now require at least Node 4. | ||
* Breaking: Update PostCSS to 6.0.0. | ||
* Added: This module can now convert initial values *to* the `initial` keyword, | ||
but only when the browser support is sufficient. You may use Browserslist to | ||
supply a list of browsers; we recommend using the config file as the same | ||
values will be propagated to other cssnano plugins which have the same | ||
functionality. See https://github.com/ai/browserslist#config-file for | ||
more details. | ||
# 1.0.1 | ||
@@ -2,0 +13,0 @@ |
'use strict'; | ||
exports.__esModule = true; | ||
Object.defineProperty(exports, "__esModule", { | ||
value: true | ||
}); | ||
var _postcss = require('postcss'); | ||
var _values = require('../data/values.json'); | ||
var _has = require('has'); | ||
var _values2 = _interopRequireDefault(_values); | ||
var _has2 = _interopRequireDefault(_has); | ||
var _browserslist = require('browserslist'); | ||
var _browserslist2 = _interopRequireDefault(_browserslist); | ||
var _caniuseApi = require('caniuse-api'); | ||
var _fromInitial = require('../data/fromInitial.json'); | ||
var _fromInitial2 = _interopRequireDefault(_fromInitial); | ||
var _toInitial = require('../data/toInitial.json'); | ||
var _toInitial2 = _interopRequireDefault(_toInitial); | ||
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } | ||
var initial = 'initial'; | ||
exports.default = (0, _postcss.plugin)('postcss-reduce-initial', function () { | ||
return function (css) { | ||
return function (css, result) { | ||
var resultOpts = result.opts || {}; | ||
var browsers = (0, _browserslist2.default)(null, { | ||
stats: resultOpts.stats, | ||
path: __dirname, | ||
env: resultOpts.env | ||
}); | ||
var initialSupport = (0, _caniuseApi.isSupported)('css-initial-value', browsers); | ||
css.walkDecls(function (decl) { | ||
if (decl.value !== 'initial') { | ||
var prop = decl.prop; | ||
if (initialSupport && (0, _has2.default)(_toInitial2.default, prop) && decl.value === _toInitial2.default[prop]) { | ||
decl.value = initial; | ||
return; | ||
} | ||
if (_values2.default[decl.prop]) { | ||
decl.value = _values2.default[decl.prop]; | ||
if (decl.value !== initial || !_fromInitial2.default[prop]) { | ||
return; | ||
} | ||
decl.value = _fromInitial2.default[prop]; | ||
}); | ||
@@ -23,0 +52,0 @@ }; |
{ | ||
"name": "postcss-reduce-initial", | ||
"version": "1.0.1", | ||
"version": "4.0.0-rc.0", | ||
"description": "Reduce initial definitions to the actual initial value, where possible.", | ||
@@ -12,9 +12,4 @@ "main": "dist/index.js", | ||
"scripts": { | ||
"acquire": "node ./dist/acquire.js > ./data/values.json", | ||
"contributorAdd": "all-contributors add", | ||
"contributorGenerate": "all-contributors generate", | ||
"pretest": "eslint src", | ||
"prepublish": "del-cli dist && BABEL_ENV=publish babel src --out-dir dist --ignore /__tests__/", | ||
"test": "ava", | ||
"test-012": "ava" | ||
"acquire": "babel-node ./src/acquire.js", | ||
"prepublish": "cross-env BABEL_ENV=publish babel src --out-dir dist --ignore /__tests__/,src/acquire.js" | ||
}, | ||
@@ -28,21 +23,10 @@ "keywords": [ | ||
"devDependencies": { | ||
"all-contributors-cli": "^3.0.5", | ||
"ava": "^0.17.0", | ||
"babel-cli": "^6.3.17", | ||
"babel-core": "^6.3.26", | ||
"babel-plugin-add-module-exports": "^0.2.1", | ||
"babel-preset-es2015": "^6.3.13", | ||
"babel-preset-es2015-loose": "^7.0.0", | ||
"babel-preset-stage-0": "^6.3.13", | ||
"babel-register": "^6.9.0", | ||
"del-cli": "^0.2.0", | ||
"eslint": "^3.0.0", | ||
"eslint-config-cssnano": "^3.0.0", | ||
"eslint-plugin-babel": "^3.3.0", | ||
"eslint-plugin-import": "^2.0.1", | ||
"got": "^6.3.0", | ||
"html2plaintext": "^1.0.1", | ||
"is-html": "^1.0.0" | ||
"babel-cli": "^6.0.0", | ||
"cross-env": "^3.0.0", | ||
"got": "^6.0.0", | ||
"html2plaintext": "^1.0.0", | ||
"is-html": "^1.0.0", | ||
"write-file": "^1.0.0" | ||
}, | ||
"homepage": "https://github.com/ben-eb/postcss-reduce-initial", | ||
"homepage": "https://github.com/ben-eb/cssnano", | ||
"author": { | ||
@@ -53,12 +37,15 @@ "name": "Ben Briggs", | ||
}, | ||
"repository": "ben-eb/postcss-reduce-initial", | ||
"repository": "ben-eb/cssnano", | ||
"dependencies": { | ||
"postcss": "^5.0.4" | ||
"browserslist": "^2.0.0", | ||
"caniuse-api": "^2.0.0", | ||
"has": "^1.0.0", | ||
"postcss": "^6.0.0" | ||
}, | ||
"ava": { | ||
"require": "babel-register" | ||
"bugs": { | ||
"url": "https://github.com/ben-eb/cssnano/issues" | ||
}, | ||
"eslintConfig": { | ||
"extends": "cssnano" | ||
"engines": { | ||
"node": ">=4" | ||
} | ||
} |
@@ -1,2 +0,2 @@ | ||
# [postcss][postcss]-reduce-initial [][ci] [][npm] [][deps] | ||
# [postcss][postcss]-reduce-initial | ||
@@ -15,11 +15,14 @@ > Reduce `initial` definitions to the *actual* initial value, where possible. | ||
## Example | ||
## Examples | ||
This module will replace the `initial` CSS keyword with the *actual* value, | ||
when this value is smaller than the `initial` definition itself. For example, | ||
the initial value for the `min-width` property is `0`; therefore, these two | ||
definitions are equivalent; | ||
See the [data](data) for more conversions. This data is courtesy | ||
of Mozilla. | ||
### Input | ||
### Convert `initial` values | ||
When the `initial` keyword is longer than the property value, it will | ||
be converted: | ||
#### Input | ||
```css | ||
@@ -31,3 +34,3 @@ h1 { | ||
### Output | ||
#### Output | ||
@@ -40,6 +43,28 @@ ```css | ||
See the [data](data/values.json) for more conversions. This data is courtesy | ||
of Mozilla. | ||
### Convert values back to `initial` | ||
When the `initial` value is smaller than the property value, it will | ||
be converted: | ||
#### Input | ||
```css | ||
h1 { | ||
transform-box: border-box; | ||
} | ||
``` | ||
#### Output | ||
```css | ||
h1 { | ||
transform-box: initial; | ||
} | ||
``` | ||
This conversion is only applied when you supply a browsers list that all support | ||
the `initial` keyword; it's worth noting that Internet Explorer has no support. | ||
## Usage | ||
@@ -53,13 +78,5 @@ | ||
Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds/all-contributors#emoji-key)): | ||
See [CONTRIBUTORS.md](https://github.com/ben-eb/cssnano/blob/master/CONTRIBUTORS.md). | ||
<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section --> | ||
| [<img src="https://avatars.githubusercontent.com/u/1282980?v=3" width="100px;"/><br /><sub>Ben Briggs</sub>](http://beneb.info)<br />[💻](https://github.com/ben-eb/postcss-reduce-initial/commits?author=ben-eb) [📖](https://github.com/ben-eb/postcss-reduce-initial/commits?author=ben-eb) 👀 [⚠️](https://github.com/ben-eb/postcss-reduce-initial/commits?author=ben-eb) | [<img src="https://avatars.githubusercontent.com/u/551712?v=3" width="100px;"/><br /><sub>Chris Walker</sub>](http://thechriswalker.github.com/)<br />[🐛](https://github.com/ben-eb/postcss-reduce-initial/issues?q=author%3Athechriswalker) [💻](https://github.com/ben-eb/postcss-reduce-initial/commits?author=thechriswalker) | | ||
| :---: | :---: | | ||
<!-- ALL-CONTRIBUTORS-LIST:END --> | ||
This project follows the [all-contributors] specification. Contributions of | ||
any kind welcome! | ||
## License | ||
@@ -74,7 +91,2 @@ | ||
[all-contributors]: https://github.com/kentcdodds/all-contributors | ||
[ci]: https://travis-ci.org/ben-eb/postcss-reduce-initial | ||
[deps]: https://gemnasium.com/ben-eb/postcss-reduce-initial | ||
[npm]: http://badge.fury.io/js/postcss-reduce-initial | ||
[postcss]: https://github.com/postcss/postcss |
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