55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
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/**
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* @typedef {import('hast').Comment} Comment
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* @typedef {import('hast').Parents} Parents
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*
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* @typedef {import('../index.js').State} State
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*/
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import {stringifyEntities} from 'stringify-entities'
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const htmlCommentRegex = /^>|^->|<!--|-->|--!>|<!-$/g
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// Declare arrays as variables so it can be cached by `stringifyEntities`
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const bogusCommentEntitySubset = ['>']
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const commentEntitySubset = ['<', '>']
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/**
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* Serialize a comment.
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*
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* @param {Comment} node
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* Node to handle.
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* @param {number | undefined} _1
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* Index of `node` in `parent.
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* @param {Parents | undefined} _2
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* Parent of `node`.
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* @param {State} state
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* Info passed around about the current state.
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* @returns {string}
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* Serialized node.
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*/
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export function comment(node, _1, _2, state) {
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// See: <https://html.spec.whatwg.org/multipage/syntax.html#comments>
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return state.settings.bogusComments
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? '<?' +
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stringifyEntities(
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node.value,
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Object.assign({}, state.settings.characterReferences, {
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subset: bogusCommentEntitySubset
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})
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) +
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'>'
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: '<!--' + node.value.replace(htmlCommentRegex, encode) + '-->'
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/**
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* @param {string} $0
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*/
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function encode($0) {
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return stringifyEntities(
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$0,
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Object.assign({}, state.settings.characterReferences, {
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subset: commentEntitySubset
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})
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)
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}
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}
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