43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
/// <reference types="mdast-util-math" />
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/// <reference types="remark-parse" />
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/// <reference types="remark-stringify" />
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/**
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* @typedef {import('mdast').Root} Root
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* @typedef {import('mdast-util-math').ToOptions} Options
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* @typedef {import('unified').Processor<Root>} Processor
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*/
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import {mathFromMarkdown, mathToMarkdown} from 'mdast-util-math'
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import {math} from 'micromark-extension-math'
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/** @type {Readonly<Options>} */
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const emptyOptions = {}
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/**
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* Add support for math.
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*
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* @param {Readonly<Options> | null | undefined} [options]
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* Configuration (optional).
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* @returns {undefined}
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* Nothing.
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*/
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export default function remarkMath(options) {
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// @ts-expect-error: TS is wrong about `this`.
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// eslint-disable-next-line unicorn/no-this-assignment
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const self = /** @type {Processor} */ (this)
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const settings = options || emptyOptions
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const data = self.data()
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const micromarkExtensions =
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data.micromarkExtensions || (data.micromarkExtensions = [])
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const fromMarkdownExtensions =
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data.fromMarkdownExtensions || (data.fromMarkdownExtensions = [])
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const toMarkdownExtensions =
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data.toMarkdownExtensions || (data.toMarkdownExtensions = [])
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micromarkExtensions.push(math(settings))
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fromMarkdownExtensions.push(mathFromMarkdown())
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toMarkdownExtensions.push(mathToMarkdown(settings))
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}
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