80 lines
1.8 KiB
Markdown
80 lines
1.8 KiB
Markdown
[](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 and Bogdan Chadkin, 2015.
|