PostCSS HTML Syntax
PostCSS syntax for parsing HTML (and HTML-like)
Getting Started
First thing's first, install the module:
npm install postcss-html --save-devIf you want support SCSS/SASS/LESS/SugarSS syntax, you need to install the corresponding module.
- SCSS: postcss-scss
- SASS: postcss-sass
- LESS: postcss-less
- SugarSS: sugarss
- Stylus: postcss-styl
Use Cases
const postcss = require('postcss');
const syntax = require('postcss-html')({
// syntax for parse scss (non-required options)
scss: require('postcss-scss'),
// syntax for parse less (non-required options)
less: require('postcss-less'),
// syntax for parse css blocks (non-required options)
css: require('postcss-safe-parser'),
});
postcss(plugins).process(source, { syntax: syntax }).then(function (result) {
// An alias for the result.css property. Use it with syntaxes that generate non-CSS output.
result.content
});If you want support SCSS/SASS/LESS/SugarSS syntax, you need to install these module:
- SCSS: postcss-scss
- SASS: postcss-sass
- LESS: postcss-less
- SugarSS: sugarss
- Stylus: postcss-styl
Advanced Use Cases
Options
const options = {
rules: [
{
// custom language
test: /^postcss$/i,
lang: 'scss'
},
{
// custom language
test: /^customcss$/i,
lang: 'custom'
},
],
// custom parser for CSS (using `postcss-safe-parser`)
css: 'postcss-safe-parser',
// custom parser for SASS (PostCSS-compatible syntax.)
sass: require('postcss-sass'),
// custom parser for SCSS (by module name)
scss: 'postcss-scss',
// custom parser for LESS (by module path)
less: require.resolve('./node_modules/postcss-less'),
// custom parser for SugarSS
sugarss: require('sugarss'),
// custom parser for custom language
custom: require('postcss-custom-syntax'),
}
const syntax = require('postcss-html')(options);Turning PostCSS off from within your HTML
PostCSS can be temporarily turned off by using special comments in your HTML. For example:
<html>
<body>
<!-- postcss-ignore -->
<a style="color: red;" description="style is not parsed."></a>
<a style="color: red;" description="style is parsed."></a><html>
<body>
<!-- postcss-disable -->
<a style="color: red;" description="style is not parsed."></a>
<a style="color: red;" description="style is not parsed."></a>
<!-- postcss-enable -->
<a style="color: red;" description="style is parsed."></a>Linting with Stylelint
The main use case of this plugin is to apply linting with Stylelint to <style> tags and <div style="*"> property in HTML (and HTML-like).
You can use it by configuring your stylelint config as follows:
{
"overrides": [
{
"files": ["*.html", "**/*.html"],
"customSyntax": "postcss-html"
}
]
}You can use it more easily if you use an already configured sharable config.
{
+ "extends": [
+ "stylelint-config-html",
// If you are using Vue.
+ "stylelint-config-recommended-vue"
+ ],
- "overrides": [
- {
- "files": ["*.html", "**/*.html"],
- "customSyntax": "postcss-html"
- }
- ]
}