postcss-unit

Unlike other postcss plugins only dealing with specific unit (px2rem, px2vw, px2rpx, ...), this one convert any unit in css as long as you provide the convert funtcion !!!

Install

$ npm install postcss-unit --save-dev

Usage

Like all other postcss plugins, you may use it with Webpack, Gulp, Grunt or other workflow, please refer this

Example

Default options

// with default options
{
    from: 'px',
    to: 'rpx',
    convert: num => num, // function to convert the matched number
    precision: 3, // negative (-1) to leave the number as it is
    minValue: 0, // number not less than this will be converted
    mediaQuery: false,  // enable conversion in @media query
    propWhiteList: [], // string or regexp
    selectorBlackList: [] // string or regexp
}

/* input */
.border-bottom {
    padding: 0 20px;
    border-bottom: 1px solid;
}

/* output */
.border-bottom {
    padding: 0 20rpx;
    border-bottom: 1rpx solid;
}

Multi options

// give an array of optins to do multi convert at the same time
[{
    from: 'px',
    to: 'vw',
    convert: num => num / 7.5,
    precision: 5,
    minValue: 1,
    mediaQuery: true,
    selectorBlackList: ['.ignore']
}, {
    from: 'em',
    to: 'rem',
    precision: -1,
    propWhiteList: [/font-.*/gi],
}, {
    from: 'cm',
    to: 'mm',
    convert: num => num * 10
}]

/* input */
@media screen and (max-width: 768px) {
    h1 {
        height: 10em;
        margin: 20cm 100mm;
        padding: 5px 1px;
        font-size: 1.5em;
        line-height: 1.25;
    }
    body .ignore h2 {
        padding: 5px 1px;
    }
}

/* output */
@media screen and (max-width: 102.40000vw) {
    h1 {
        height: 10em;
        margin: 200mm 100mm;
        padding: 0.66667vw 1px;
        font-size: 1.5rem;
        line-height: 1.25;
    }
    body .ignore h2 {
        padding: 5px 1px;
    }
}