| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384 | 
							- [](https://travis-ci.org/css-modules/icss-utils)
 
- # ICSS Utils
 
- ## replaceSymbols
 
- Governs the way tokens are searched & replaced during the linking stage of ICSS loading.
 
- This is broken into its own module in case the behaviour needs to be replicated in other PostCSS plugins
 
- (i.e. [CSS Modules Values](https://github.com/css-modules/postcss-modules-values))
 
- ```js
 
- import { replaceSymbols, replaceValueSymbols } from "icss-utils";
 
- replaceSymbols(css, replacements);
 
- replaceValueSymbols(string, replacements);
 
- ```
 
- Where:
 
- - `css` is the PostCSS tree you're working with
 
- - `replacements` is an JS object of `symbol: "replacement"` pairs, where all occurrences of `symbol` are replaced with `replacement`.
 
- A symbol is a string of alphanumeric, `-` or `_` characters. A replacement can be any string. They are replaced in the following places:
 
- - In the value of a declaration, i.e. `color: my_symbol;` or `box-shadow: 0 0 blur spread shadow-color`
 
- - In a media expression i.e. `@media small {}` or `@media screen and not-large {}`
 
- ## extractICSS(css, removeRules = true)
 
- Extracts and remove (if removeRules is equal true) from PostCSS tree `:import` and `:export` statements.
 
- ```js
 
- import postcss from "postcss";
 
- import { extractICSS } from "icss-utils";
 
- const css = postcss.parse(`
 
-   :import(colors) {
 
-     a: b;
 
-   }
 
-   :export {
 
-     c: d;
 
-   }
 
- `);
 
- extractICSS(css);
 
- /*
 
-   {
 
-     icssImports: {
 
-       colors: {
 
-         a: 'b'
 
-       }
 
-     },
 
-     icssExports: {
 
-       c: 'd'
 
-     }
 
-   }
 
- */
 
- ```
 
- ## createICSSRules(icssImports, icssExports)
 
- Converts icss imports and exports definitions to postcss ast
 
- ```js
 
- createICSSRules(
 
-   {
 
-     colors: {
 
-       a: "b"
 
-     }
 
-   },
 
-   {
 
-     c: "d"
 
-   }
 
- );
 
- ```
 
- ## License
 
- ISC
 
- ---
 
- Glen Maddern, Bogdan Chadkin and Evilebottnawi 2015-present.
 
 
  |