PostCSS Flexboxfixer
PostCSS plugin to rewrite code with existing vendor prefixes for flexbox (especially -webkit- prefixed) and syntax based on older versions of the CSS specification, and add equivalent un-prefixed CSS.
For example, here's some CSS full of vendor-specific code and syntax based on older versions of the CSS specifications:
The flexboxfixer plugin will add the equivalent standard declarations (while leaving the old CSS for backwards compatibility with older WebKit-based browsers):
Usage
To use in Node.js scripts:
npm install postcss-flexboxfixer
See PostCSS docs for examples for your environment.