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103 lines
2.9 KiB
103 lines
2.9 KiB
2 years ago
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import {
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AcceptedPlugin,
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Plugin,
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ProcessOptions,
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Transformer,
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TransformCallback
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} from './postcss.js'
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import LazyResult from './lazy-result.js'
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import Result from './result.js'
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import Root from './root.js'
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import NoWorkResult from './no-work-result.js'
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/**
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* Contains plugins to process CSS. Create one `Processor` instance,
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* initialize its plugins, and then use that instance on numerous CSS files.
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*
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* ```js
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* const processor = postcss([autoprefixer, postcssNested])
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* processor.process(css1).then(result => console.log(result.css))
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* processor.process(css2).then(result => console.log(result.css))
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* ```
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*/
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export default class Processor {
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/**
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* Current PostCSS version.
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*
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* ```js
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* if (result.processor.version.split('.')[0] !== '6') {
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* throw new Error('This plugin works only with PostCSS 6')
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* }
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* ```
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*/
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version: string
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/**
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* Plugins added to this processor.
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*
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* ```js
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* const processor = postcss([autoprefixer, postcssNested])
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* processor.plugins.length //=> 2
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* ```
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*/
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plugins: (Plugin | Transformer | TransformCallback)[]
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/**
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* @param plugins PostCSS plugins
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*/
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constructor(plugins?: AcceptedPlugin[])
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/**
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* Adds a plugin to be used as a CSS processor.
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*
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* PostCSS plugin can be in 4 formats:
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* * A plugin in `Plugin` format.
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* * A plugin creator function with `pluginCreator.postcss = true`.
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* PostCSS will call this function without argument to get plugin.
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* * A function. PostCSS will pass the function a @{link Root}
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* as the first argument and current `Result` instance
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* as the second.
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* * Another `Processor` instance. PostCSS will copy plugins
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* from that instance into this one.
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*
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* Plugins can also be added by passing them as arguments when creating
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* a `postcss` instance (see [`postcss(plugins)`]).
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*
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* Asynchronous plugins should return a `Promise` instance.
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*
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* ```js
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* const processor = postcss()
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* .use(autoprefixer)
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* .use(postcssNested)
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* ```
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*
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* @param plugin PostCSS plugin or `Processor` with plugins.
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* @return Current processor to make methods chain.
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*/
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use(plugin: AcceptedPlugin): this
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/**
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* Parses source CSS and returns a `LazyResult` Promise proxy.
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* Because some plugins can be asynchronous it doesn’t make
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* any transformations. Transformations will be applied
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* in the `LazyResult` methods.
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*
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* ```js
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* processor.process(css, { from: 'a.css', to: 'a.out.css' })
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* .then(result => {
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* console.log(result.css)
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* })
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* ```
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*
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* @param css String with input CSS or any object with a `toString()` method,
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* like a Buffer. Optionally, senda `Result` instance
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* and the processor will take the `Root` from it.
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* @param opts Options.
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* @return Promise proxy.
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*/
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process(
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css: string | { toString(): string } | Result | LazyResult | Root,
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options?: ProcessOptions
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): LazyResult | NoWorkResult
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}
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