fig-pxtorem

Install

``shell
$ yarn add fix-pxtorem -S
`

Usage

* inclue files

config include exclude

- inclue (Array) inclue files, use: must absolute path ['/path/a','/path/b'].

`
const path = require('path');
const fs = require('fs');

const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
module.exports = {
plugins: [
require('postcss-flexbugs-fixes'),
require('postcss-preset-env')({
autoprefixer: {
flexbox: 'no-2009'
},
stage: 3
}),
require('fig-pxtorem')({
rootValue: 16,
unitPrecision: 5,
mediaQuery: false,
minPixelValue: 0,
include: [resolveApp('/src/pages/m'), resolveApp('/src/xxx/m')],
propList: [
'background',
'padding',
'margin',
'letter-spacing',
'*width',
'*height',
'left',
'font*',
'right',
'top',
'bottom'
]
})
// require('antd-mobile')({
// style: "css"
// })
]
};

`

$3

With the default settings, only font related properties are targeted.

`css
// input
h1 {
margin: 0 0 20px;
font-size: 32px;
line-height: 1.2;
letter-spacing: 1px;
}

// output
h1 {
margin: 0 0 20px;
font-size: 2rem;
line-height: 1.2;
letter-spacing: 0.0625rem;
}
`

$3

`js
var fs = require('fs');
var postcss = require('postcss');
var pxtorem = require('postcss-pxtorem-x');
var css = fs.readFileSync('main.css', 'utf8');
var options = {
replace: false
};
var processedCss = postcss(pxtorem(options)).process(css).css;

fs.writeFile('main-rem.css', processedCss, function (err) {
if (err) {
throw err;
}
console.log('Rem file written.');
});
`

$3

Type: Object | Null
Default:
`js
{
rootValue: 16,
unitPrecision: 5,
propList: ['font', 'font-size', 'line-height', 'letter-spacing'],
selectorBlackList: [],
replace: true,
mediaQuery: false,
minPixelValue: 0,
exclude: ['/path/a','/path/b'],
include: ['/path/a','/path/b']
}
`

- rootValue (Number) The root element font size.
- unitPrecision (Number) The decimal numbers to allow the REM units to grow to.
- propList (Array) The properties that can change from px to rem.
- Values need to be exact matches.
- Use wildcard to enable all properties. Example: ['']
- Use at the start or end of a word. (['position*'] will match background-position-y)
- Use ! to not match a property. Example: ['*', '!letter-spacing']
- Combine the "not" prefix with the other prefixes. Example: ['', '!font']
- selectorBlackList (Array) The selectors to ignore and leave as px.
- If value is string, it checks to see if selector contains the string.
- ['body'] will match .body-class
- If value is regexp, it checks to see if the selector matches the regexp.
- [/^body$/] will match body but not .body
- replace (Boolean) replaces rules containing rems instead of adding fallbacks.
- mediaQuery (Boolean) Allow px to be converted in media queries.
- minPixelValue (Number) Set the minimum pixel value to replace.
- inclue (Array) inclue files, use: must absolute path ['/path/a','/path/b'].


$3

`js
var gulp = require('gulp');
var postcss = require('gulp-postcss');
var autoprefixer = require('autoprefixer');
var pxtorem = require('postcss-pxtorem-x');

gulp.task('css', function () {

var processors = [
autoprefixer({
browsers: 'last 1 version'
}),
pxtorem({
replace: false
})
];

return gulp.src(['build/css/*/.css'])
.pipe(postcss(processors))
.pipe(gulp.dest('build/css'));
});
`

$3

`css
// px is converted to rem
.convert {
font-size: 16px; // converted to 1rem
}

// Px or PX is ignored by postcss-pxtorem-x but still accepted by browsers
.ignore {
border: 1Px solid; // ignored
border-width: 2PX; // ignored
}
``