56 lines
1 KiB
JavaScript
56 lines
1 KiB
JavaScript
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/**
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* @typedef {import('hast').Nodes} Nodes
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* @typedef {import('hast').Parents} Parents
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*/
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/**
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* Get the plain-text value of a hast node.
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*
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* @param {Nodes} node
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* Node to serialize.
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* @returns {string}
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* Serialized node.
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*/
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export function toString(node) {
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// “The concatenation of data of all the Text node descendants of the context
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// object, in tree order.”
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if ('children' in node) {
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return all(node)
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}
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// “Context object’s data.”
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return 'value' in node ? node.value : ''
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}
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/**
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* @param {Nodes} node
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* Node.
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* @returns {string}
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* Serialized node.
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*/
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function one(node) {
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if (node.type === 'text') {
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return node.value
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}
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return 'children' in node ? all(node) : ''
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}
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/**
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* @param {Parents} node
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* Node.
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* @returns {string}
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* Serialized node.
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*/
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function all(node) {
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let index = -1
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/** @type {Array<string>} */
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const result = []
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while (++index < node.children.length) {
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result[index] = one(node.children[index])
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}
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return result.join('')
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}
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