69 lines
1.2 KiB
Markdown
69 lines
1.2 KiB
Markdown
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rework-plugin-function
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====================
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[](https://travis-ci.org/reworkcss/rework-plugin-function)
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function() plugin for rework, formerly included in core
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Add user-defined CSS functions.
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For example create `black(0.5)` shortcut, to replace
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long `rgba(0, 0, 0, 0.5)`.
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```js
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var rework = require('rework'),
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var reworkFunction = require('rework-plugin-function');
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var css = rework(css)
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.use(reworkFunction({ black: black }))
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.toString()
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function black(opacity) {
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return 'rgba(0, 0, 0, ' + opacity + ')';
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}
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```
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User code will receive CSS arguments and replace user-defined function
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by returned code.
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```css
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input {
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box-shadow: 0 0 5px black(0.7);
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}
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```
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yields:
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```css
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input {
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box-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
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}
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```
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Nested functions works well too:
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```javascript
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var css = rework(css)
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.use(reworkFunction({
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subtract: function(a, b) { return a - b },
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multiply: function(a, b) { return a * b },
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divide: function(a, b) { return a / b },
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floor: Math.floor
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}))
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.toString()
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```
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```css
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input {
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top: divide(subtract(30, floor(multiply(20, 10))), 2);
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}
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```
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Would yield:
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```css
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input {
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top: -85;
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}
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```
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