Index: frontend/node_modules/postcss-media-minmax/README.md =================================================================== --- frontend/node_modules/postcss-media-minmax/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/postcss-media-minmax/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,310 @@ +# PostCSS Media Minmax + +[![CSS Standard Status](https://cssdb.org/badge/media-query-ranges.svg)](https://cssdb.org/#media-query-ranges) +[![Build Status](https://travis-ci.org/postcss/postcss-media-minmax.svg?branch=master)](https://travis-ci.org/postcss/postcss-media-minmax) +[![NPM Downloads](https://img.shields.io/npm/dm/postcss-media-minmax.svg?style=flat)](https://www.npmjs.com/package/postcss-media-minmax) +[![NPM Version](https://img.shields.io/npm/v/postcss-media-minmax.svg?style=flat)](https://www.npmjs.com/package/postcss-media-minmax) +[![License](https://img.shields.io/npm/l/postcss-media-minmax.svg?style=flat)](https://opensource.org/licenses/MIT) + +> Writing simple and graceful media queries! + +The `min-width`, `max-width` and many other properties of media queries are really confusing. I want to cry every time I see them. But right now according to the new specs, you can use more intuitive `<=` or `>=` to replace the `min-`/`max-` prefixes in media queries. + +V2.1.0 began to support `>` or `<` symbol. + +This is a polyfill plugin which supports [CSS Media Queries Level 4](https://drafts.csswg.org/mediaqueries/#mq-range-context) and gives you access to the new features right away. Mom will never worry about my study any more. So amazing! + + +[简体中文](README-zh.md) + +----- + +![Gif Demo](https://gtms02.alicdn.com/tps/i2/TB1UIjyGVXXXXcCaXXXx274FpXX-877-339.gif) + + +## Installation + + $ npm install postcss-media-minmax + +## Quick Start + +Example 1: + +```js +var fs = require('fs') +var postcss = require('postcss') +var minmax = require('postcss-media-minmax') + +var css = fs.readFileSync('input.css', 'utf8') + +var output = postcss() + .use(minmax()) + .process(css) + .css + +console.log('\n====>Output CSS:\n', output) +``` + +Or just: + +```js +var output = postcss(minmax()) + .process(css) + .css +``` + +input.css: + +```css +@media screen and (width >= 500px) and (width <= 1200px) { + .bar { + display: block; + } +} +``` + +You will get: + +```css +@media screen and (min-width: 500px) and (max-width: 1200px) { + .bar { + display: block; + } +} +``` + +## CSS syntax + +### [Syntax](https://drafts.csswg.org/mediaqueries/#mq-range-context) + +``` + = [ '<' | '>' ]? '='? + | [ '<' | '>' ]? '='? + | '<' '='? '<' '='? + | '>' '='? '>' '='? +``` + +![syntax](https://gtms03.alicdn.com/tps/i3/TB1Rje0HXXXXXXeXpXXccZJ0FXX-640-290.png) + +PostCSS Media Minmax hasn't implemented syntax such as `200px > = width` or `200px < = width` currently because its readability is not good enough yet. + +## [Values](https://drafts.csswg.org/mediaqueries/#values) + +**The special values:** + +* [](https://drafts.csswg.org/mediaqueries/#typedef-ratio) + + The value type is a positive (not zero or negative) followed by optional whitespace, followed by a solidus ('/'), followed by optional whitespace, followed by a positive . s can be ordered or compared by transforming them into the number obtained by dividing their first by their second . + + ```css + @media screen and (device-aspect-ratio: 16 / 9) { + /* rules */ + } + + /* equivalent to */ + @media screen and (device-aspect-ratio: 16/9) { + /* rules */ + } + ``` + +* [](https://drafts.csswg.org/mediaqueries/#typedef-mq-boolean) + + The value type is an with the value 0 or 1. Any other integer value is invalid. Note that -0 is always equivalent to 0 in CSS, and so is also accepted as a valid value. + + ```css + @media screen and (grid: -0) { + /* rules */ + } + + /* equivalent to */ + @media screen and (grid: 0) { + /* rules */ + } + ``` + +## How to use + +### Shorthand + +In Example 1, if a feature has both `>=` and `<=` logic, it can be written as follows: + +```css +@media screen and (500px <= width <= 1200px) { + .bar { + display: block; + } +} +/* Or */ +@media screen and (1200px >= width >= 500px) { + .bar { + display: block; + } +} +``` + +Which will output: + +```css +@media screen and (min-width: 500px) and (max-width: 1200px) { + .bar { + display: block; + } +} +``` + +**Note**: When the media feature name is in the middle, we must ensure that two `<=` or `>=` are in the same direction, otherwise which will not be converted. + +E.g. in the example below, `width` is greater than or equal to 500px and is greater than or equal to 1200px, which is the wrong in both grammar and logic. + + +```css +@media screen and (1200px <= width >= 500px) { + .bar { + display: block; + } +} +``` + +### Media feature names + +The following properties support the `min-`/`max-` prefixes in the specifications at present, and will be automatically converted by PostCSS Media Minmax. + +* `width` +* `height` +* `device-width` +* `device-height` +* `aspect-ratio` +* `device-aspect-ratio` +* `color` +* `color-index` +* `monochrome` +* `resolution` + + + +### Using with `@custom-media` & Node Watch + +```js +var fs = require('fs') +var chokidar = require('chokidar') +var postcss = require('postcss') +var minmax = require('postcss-media-minmax') +var customMedia = require('postcss-custom-media') + +var src = 'input.css' + +console.info('Watching…\nModify the input.css and save.') + + +chokidar.watch(src, { + ignored: /[\/\\]\./, + persistent: true +}).on('all', + function(event, path, stats) { + var css = fs.readFileSync(src, 'utf8') + var output = postcss() + .use(customMedia()) + .use(minmax()) + .process(css) + .css; + fs.writeFileSync('output.css', output) + }) + +``` + + +input.css: + +```css +@custom-media --foo (width >= 20em) and (width <= 50em); +@custom-media --bar (height >= 300px) and (height <= 600px); + +@media (--foo) and (--bar) { + +} +``` + +output.css: + +```css +@media (min-width: 20em) and (max-width: 50em) and (min-height: 300px) and (max-height: 600px) { + +} +``` + +### Grunt + +```js +module.exports = function(grunt) { + grunt.initConfig({ + pkg: grunt.file.readJSON('package.json'), + postcss: { + options: { + processors: [ + require('autoprefixer-core')({ browsers: ['> 0%'] }).postcss, //Other plugin + require('postcss-media-minmax')(), + ] + }, + dist: { + src: ['src/*.css'], + dest: 'build/grunt.css' + } + } + }); + + grunt.loadNpmTasks('grunt-contrib-uglify'); + grunt.loadNpmTasks('grunt-postcss'); + + grunt.registerTask('default', ['postcss']); +} +``` + +### Gulp + +```js +var gulp = require('gulp'); +var rename = require('gulp-rename'); +var postcss = require('gulp-postcss'); +var selector = require('postcss-media-minmax') +var autoprefixer = require('autoprefixer-core') + +gulp.task('default', function () { + var processors = [ + autoprefixer({ browsers: ['> 0%'] }), //Other plugin + minmax() + ]; + gulp.src('src/*.css') + .pipe(postcss(processors)) + .pipe(rename('gulp.css')) + .pipe(gulp.dest('build')) +}); +gulp.watch('src/*.css', ['default']); +``` + + +## Contributing + +* Install all the dependent modules. +* Respect the coding style (Use [EditorConfig](https://editorconfig.org/)). +* Add test cases in the [test](test) directory. +* Run the test cases. + +``` +$ git clone https://github.com/postcss/postcss-media-minmaxs.git +$ git checkout -b patch +$ npm install +$ npm test +``` + +## Acknowledgements + +* Thank the author of PostCSS [Andrey Sitnik](https://github.com/ai) for giving us such simple and easy CSS syntax analysis tools. + +* Thank [Tab Atkins Jr.](https://www.xanthir.com/contact/) for writing the specs of Media Queries Level 4. + +* Thank [ziyunfei](https://weibo.com/p/1005051708684567) for suggestions and help of this plugin. + + +## [Changelog](CHANGELOG.md) + +## [License](LICENSE)