postcss.Processor | /deps.ts | fed_dev@0.9.0

class postcss.Processor

Re-export

import { postcss } from "https://deno.land/x/fed_dev@0.9.0/deps.ts";
const { Processor } = postcss;

Contains plugins to process CSS. Create one Processor instance, initialize its plugins, and then use that instance on numerous CSS files.

const processor = postcss([autoprefixer, postcssNested])
processor.process(css1).then(result => console.log(result.css))
processor.process(css2).then(result => console.log(result.css))

Constructors

new

Processor(plugins?: AcceptedPlugin[])

Properties

plugins: (Plugin | Transformer | TransformCallback)[]

Plugins added to this processor.

const processor = postcss([autoprefixer, postcssNested])
processor.plugins.length //=> 2

version: string

Current PostCSS version.

if (result.processor.version.split('.')[0] !== '6') {
  throw new Error('This plugin works only with PostCSS 6')
}

Methods

process(css:

| string

| { toString(): string; }

| Result

| LazyResult

| Root

, options?: ProcessOptions): LazyResult | NoWorkResult

Parses source CSS and returns a LazyResult Promise proxy. Because some plugins can be asynchronous it doesn’t make any transformations. Transformations will be applied in the LazyResult methods.

processor.process(css, { from: 'a.css', to: 'a.out.css' })
  .then(result => {
     console.log(result.css)
  })

use(plugin: AcceptedPlugin): this

Adds a plugin to be used as a CSS processor.

PostCSS plugin can be in 4 formats:

A plugin in Plugin format.
A plugin creator function with pluginCreator.postcss = true. PostCSS will call this function without argument to get plugin.
A function. PostCSS will pass the function a @{link Root} as the first argument and current Result instance as the second.
Another Processor instance. PostCSS will copy plugins from that instance into this one.

Plugins can also be added by passing them as arguments when creating a postcss instance (see [postcss(plugins)]).

Asynchronous plugins should return a Promise instance.

const processor = postcss()
  .use(autoprefixer)
  .use(postcssNested)