npm install postcss-browser-comments --save-devPostCSS Browser Comments lets you keep only the CSS you need based on comments and your browserslist.
/**
* Prevent adjustments of font size after orientation changes in IE and iOS.
*/
html {
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%;
}
/* becomes */
The comment and rule above would be removed with the following browserslist:
last 2 chrome versionsThe rule below would be more carefully altered:
/**
* 1. Add the correct box sizing in Firefox.
* 2. Show the overflow in Edge and IE.
*/
hr {
box-sizing: content-box; /* 1 */
height: 0; /* 1 */
overflow: visible; /* 2 */
}
/* with a `last 2 firefox versions` browserslist becomes */
/**
* 1. Add the correct box sizing in Firefox.
* 2. Show the overflow in Edge and IE.
*/
hr {
box-sizing: content-box; /* 1 */
height: 0; /* 1 */
}Add PostCSS Browser Comments to your project:
npm install postcss postcss-browser-comments --save-devUse it as a PostCSS plugin:
const postcss = require('postcss');
const postcssBrowserComments = require('postcss-browser-comments');
postcss([
postcssBrowserComments(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);PostCSS Browser Comments runs in all Node environments, with special instructions for:
The browsers option overrides of the project’s browserslist.
postcssBrowserComments({ browsers: 'last 2 versions' })