replace-css-url

Independent lib to replace all url() and @import paths within css text, with custom function map.

This lib will try to keep the original css style format(quote with single, double, or none), or even worked when there's syntax error.

Install

As CLI:

npm install -g replace-css-url

As javascript module:

npm install replace-css-url

Usage

As CLI:

  Usage
  $ replace-css-url [globs] options...
  Options
  --version           Show version info
  --help              Show help info
  --exec, -e          [REQUIRED] Execute function to replace for every css file with "(url, fileName)=>newCSS"
  --ignore, -i        Ignore blobs for file paths
  --backup, -b        Create backup for each replace

  globs default to '**/*.css'

  Examples
  $ replace-css-url './assets/**/*.css' './static/**/*.css' --exec '(url, file)=>url'

As javascript module:

const replace_css_url = require('replace-css-url')
 
const css = `
@import "a.css"
@import url( b.css )
p { background: url('c.png') }
`
 
// prefix each path with 'http://myhost/'
console.log( replace_css_url(
  css,
  function(path){
    return 'http://myhost/' + path
  }
) )
 
// result css
`@import "http://myhost/a.css"
@import url( http://myhost/b.css )
p { background: url('http://myhost/c.png') }
`

This lib should be used in node, as a preprocessor of css.

If you want dynamicaly change url in browser, check this lib: cssobj

API

lib(css, mapFunc)

• css [string]

The css string want to be altered.

• mapFunc [function], signature: function(path){return newPath}

A function that accept path for each appearance, both in @import or inside url( ).

Return the new path that wanted.

• RETURN [string]

The altered css with new paths.

If the return_value start with ' or ", then you can replace/add the quote instead of original one, see #1

Gotcha

This lib don't match any empty url( ) or '' ""

LICENSE

MIT