CSS postproccessor, fork from cssgrace
npm install @lfire/cssgraceconsole
npm install cssgrace
`
3. test.js
`console
npm install chokidar
`
`js
var fs = require('fs')
var cssgrace = require('cssgrace')
var src = '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')
fs.writeFileSync('build/output.css', cssgrace.pack(css))
})
`
4. input.css：
`css
.foo::after {
position: center;
width: 210px;
height: 80px;
background: rgba(112, 26, 0, .3);
}
.bar {
display: inline-block;
opacity: .5;
}
`
5. node test，we will get output.css.
`css
.foo:after {
position: absolute;
left: 50%;
top: 50%;
margin-left: -105px;
margin-top: -40px;
width: 210px;
height: 80px;
background: rgba(112, 26, 0, .3);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#4c701a00', endColorstr='#4c701a00');
}
:root .foo:after {
filter: none\9;
}
.bar {
display: inline-block;
*display: inline;
*zoom: 1;
opacity: .5;
filter: alpha(opacity=50);
}
`
-------------
How to use
$3
`js
var fs = require('fs')
var chokidar = require('chokidar')
var postcss = require('postcss')
var cssgrace = require('cssgrace')
var nested = require('postcss-nested') //CSS 代码嵌套
var minmax = require('postcss-media-minmax') //使用 >=/<= 代替 @media 中的 min-/max
var selector = require('postcss-custom-selectors') //自定义选择器
var src = '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(minmax())
.use(cssgrace)
.use(selector())
.use(nested)
.process(css)
.css;
fs.writeFileSync('build/output.css', output)
})
`
$3
`
npm install grunt-postcss
`
`js
module.exports = function(grunt) {
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
postcss: {
options: {
processors: [
require('postcss-custom-selector')(),
require('cssgrace'),
]
},
dist: {
src: ['src/*.css'],
dest: 'build/grunt.css'
}
}
});
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.loadNpmTasks('grunt-postcss');
grunt.registerTask('default', ['postcss']);
}
`
$3
`
npm install gulp-postcss
`
`js
var gulp = require('gulp');
var rename = require('gulp-rename');
var postcss = require('gulp-postcss');
var cssgrace = require('cssgrace');
var autoprefixer = require('autoprefixer-core')
gulp.task('default', function () {
var processors = [
require('cssgrace')
];
gulp.src('src/input.css')
.pipe(postcss(processors))
.pipe(rename('gulp.css'))
.pipe(gulp.dest('build'))
});
gulp.watch('src/*.css', ['default']);
`
More features
$3
input:
`css
.foo {
background-image: -webkit-image-set(
url(../img/yuxifan@1x.jpg) 1x,
url(../img/yuxifan@2x.jpg) 2x);
}
`
output:
`css
.foo {
background-image: url(../img/yuxifan@1x.jpg); / Fallback /
background-image: -webkit-image-set(
url(../img/yuxifan@1x.jpg) 1x,
url(../img/yuxifan@2x.jpg) 2x);
}
@media only screen and (min-resolution: 2dppx) {
.foo {
background-image: url(../img/yuxifan@2x.jpg);
background-size: 320px 427px;
}
}
`
$3
Using the image-width and image-height to obtain the image's width or height.
input:
`css
.foo {
background: url(../img/post-and-pre.png);
width: image-width;
height: image-height;
}
.foo {
background: url(../img/post-and-pre.png);
margin: image-width image-height -image-height;
content: 'image-width';
}
`
output:
`css
.foo {
background: url(../img/post-and-pre.png);
width: 720px;
height: 719px;
}
.foo {
background: url(../img/post-and-pre.png);
margin: 720px 719px -719px;
content: 'image-width';
}
`
$3
input:
`css
.foo {
clear: fix;
}
`
output:
`css
.foo {
*zoom: 1;
}
.foo:after {
clear: both;
}
.foo:before,
.foo:after {
content: '';
display: table;
}
`
If there is already can remove floating property, don't generate compatible code.
input:
`css
.foo {
clear: fix;
overflow: hidden;
}
`
output:
`css
.foo {
overflow: hidden;
}
`
$3
Automatic calculation of margin value, the mother will never have to worry about my math is not good.
input:
`css
.foo {
position: center;
width: 300px;
height: 123px;
}
`
output:
`css
.foo {
position: absolute;
left: 50%;
top: 50%;
margin-left: -150px;
margin-top: -61.5px;
width: 300px;
height: 123px;
}
`
$3
#### Float or absolutely positioned elements don't write display: block
input:
`css
.foo {
position: absolute;
display: block;
}
.foo {
position: center;
display: block;
}
.foo {
float: left;
display: block;
}
`
output:
`css
.foo {
position: absolute;
}
.foo {
position: center;
}
.foo {
float: left;
}
`
#### Absolutely positioned elements floating effect
Remove float: left|right.
input:
`css
.foo {
position: absolute;
float: left;
}
`
output:
`css
.foo {
position: absolute;
}
`
$3
#### resize
input:
`css
.foo {
resize: vertical;
}
.foo {
resize: both;
overflow: hidden;
}
`
output:
`css
.foo {
resize: vertical;
overflow: auto;
}
.foo {
resize: both;
overflow: hidden;
}
`
#### text-overflow: ellipsis
input:
`css
.foo {
text-overflow: ellipsis;
}
.foo {
text-overflow: ellipsis;
overflow: auto;
white-space: normal;
}
`
output:
`css
.foo {
text-overflow: ellipsis;
white-space: nowrap;
overflow: hidden;
}
.foo {
text-overflow: ellipsis;
overflow: hidden;
white-space: nowrap;
}
`
$3
#### IE opacity
input:
`css
.foo {
opacity: .6;
}
.foo {
opacity: 0.8293;
}
`
output:
`css
.foo {
opacity: .6;
filter: alpha(opacity=60);
}
.foo {
opacity: 0.8293;
filter: alpha(opacity=83);
}
`
#### IE RGBA
input:
`css
.foo {
background: rgba(153, 85, 102, 0.3);
}
`
output:
`css
.foo {
background: rgba(153, 85, 102, 0.3);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#4c995566', endColorstr='#4c995566');
}
:root .foo {
filter: none\9;
}
`
#### IE inline-block
input:
`css
.foo {
display: inline-block;
}
`
output:
`css
.foo {
display: inline-block;
*display: inline;
*zoom: 1;
}
`
Contributing
* Install all the dependent modules.
* Respect the coding style (Use EditorConfig).
* Add test cases in the test directory.
* Run the test cases.
`
$ git clone https://github.com/postcss/postcss-media-minmaxs.git
$ git checkout -b patch
$ npm install
$ npm test
``