46 lines
1 KiB
JavaScript
46 lines
1 KiB
JavaScript
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/**
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* @typedef {import('hast').Element} Element
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* @typedef {import('hast').Parents} Parents
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*/
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/**
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* @callback OmitHandle
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* Check if a tag can be omitted.
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* @param {Element} element
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* Element to check.
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* @param {number | undefined} index
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* Index of element in parent.
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* @param {Parents | undefined} parent
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* Parent of element.
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* @returns {boolean}
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* Whether to omit a tag.
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*
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*/
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const own = {}.hasOwnProperty
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/**
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* Factory to check if a given node can have a tag omitted.
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*
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* @param {Record<string, OmitHandle>} handlers
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* Omission handlers, where each key is a tag name, and each value is the
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* corresponding handler.
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* @returns {OmitHandle}
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* Whether to omit a tag of an element.
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*/
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export function omission(handlers) {
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return omit
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/**
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* Check if a given node can have a tag omitted.
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*
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* @type {OmitHandle}
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*/
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function omit(node, index, parent) {
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return (
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own.call(handlers, node.tagName) &&
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handlers[node.tagName](node, index, parent)
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)
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}
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}
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