		'use strict'

		var toText = require('hast-util-to-text')
		var lowlight = require('lowlight')
		var visit = require('unist-util-visit')
		var createPlugin = require('./core')

		module.exports = attacher

		function attacher(options) {
		var settings = options \|\| {}
		var name = 'hljs'
		var pos

		if (settings.aliases) {
		lowlight.registerAlias(settings.aliases)
		}

		if (settings.languages) {
		// eslint-disable-next-line guard-for-in
		for (let name in settings.languages) {
		lowlight.registerLanguage(name, settings.languages[name])
		}
		}

		if (settings.prefix) {
		pos = settings.prefix.indexOf('-')
		name = pos > -1 ? settings.prefix.slice(0, pos) : settings.prefix
		}

		return transformer

		function transformer(tree) {
		visit(tree, 'element', visitor)
		}

		function visitor(node, index, parent) {
		var props
		var result
		var lang

		if (!parent \|\| parent.tagName !== 'pre' \|\| node.tagName !== 'code') {
		return
		}

		lang = language(node)

		if (
		lang === false \|\|
		(!lang && settings.subset === false) \|\|
		(settings.plainText && settings.plainText.indexOf(lang) > -1)
		) {
		return
		}

		props = node.properties

		if (!props.className) {
		props.className = []
		}

		if (props.className.indexOf(name) < 0) {
		props.className.unshift(name)
		}

		try {
		result = lang
		? lowlight.highlight(lang, toText(parent), options)
		: lowlight.highlightAuto(toText(parent), options)
		} catch (error) {
		if (!settings.ignoreMissing \|\| !/Unknown language/.test(error.message)) {
		throw error
		}

		result = {}
		}

		if (!lang && result.language) {
		props.className.push('language-' + result.language)
		}

		if (result.value) {
		node.children = result.value
		}
		}
		}

		// Get the programming language of `node`.
		function language(node) {
		var className = node.properties.className \|\| []
		var index = -1
		var value

		while (++index < className.length) {
		value = className[index]

		if (value === 'no-highlight' \|\| value === 'nohighlight') {
		return false
		}

		if (value.slice(0, 5) === 'lang-') {
		return value.slice(5)
		}

		if (value.slice(0, 9) === 'language-') {
		return value.slice(9)
		}
		}
		}
		module.exports = createPlugin(lowlight)

package.json

		{
		"name": "rehype-highlight",
		"version": "4.0.1",
		"version": "4.1.0",
		"description": "rehype plugin to highlight code blocks with lowlight (highlight.js)",
		@@ -28,3 +28,5 @@ "license": "MIT",
		"files": [
		"index.js"
		"core.js",
		"index.js",
		"light.js"
		],
		@@ -31,0 +33,0 @@ "dependencies": {

readme.md

		@@ -108,2 +108,33 @@ # rehype-highlight

		## Browser

		It is not suggested to require `rehype-highlight` in the browser as it will
		include all the highlighters.

		> :warning: Please configure `languages`, as otherwise nothing gets highlighted.

		In the example below, only the JavaScript and TypeScript
		highlighters are included:

		```js
		var vfile = require('to-vfile')
		var report = require('vfile-reporter')
		var rehype = require('rehype')
		var highlight = require('rehype-highlight/light')

		rehype()
		.data('settings', {fragment: true})
		.use(highlight, {
		// Don’t forget to define the languages you need
		languages: {
		javascript: require('highlight.js/lib/languages/javascript'),
		typescript: require('highlight.js/lib/languages/typescript')
		}
		})
		.process(vfile.readSync('example.html'), function (error, file) {
		console.error(report(error \|\| file))
		console.log(String(file))
		})
		```

		## Security
		@@ -110,0 +141,0 @@

rehype-highlight - npm Package Compare versions

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