105 lines
3.7 KiB
JavaScript
105 lines
3.7 KiB
JavaScript
// markdown-it plugins
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import markdownIt from "markdown-it";
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import markdownItAnchor from "markdown-it-anchor";
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import markdownItAttribution from "markdown-it-attribution";
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import markdownItAttrs from "markdown-it-attrs";
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import markdownItBracketedSpans from 'markdown-it-bracketed-spans';
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import markdownItDefList from "markdown-it-deflist";
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import markdownItFootnote from "markdown-it-footnote";
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// Configure slug filter
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import slugify from "slugify";
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// Enable exporting markdown-it library to another module
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export let markdownLibrary;
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export default function(eleventyConfig) {
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// Configure markdown-it-anchor plugins
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eleventyConfig.setLibrary('md', markdownIt().use(markdownItAnchor))
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const linkAfterHeader = markdownItAnchor.permalink.linkAfterHeader({
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class: "heading-anchor",
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symbol: "<span hidden>#</span>",
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style: "aria-labelledby",
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});
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const markdownItAnchorOptions = {
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level: [2, 3, 4, 5],
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slugify: (str) =>
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slugify(str, {
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lower: true,
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strict: true,
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remove: /["]/g,
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}),
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tabIndex: false,
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permalink(slug, opts, state, idx) {
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state.tokens.splice(idx, 0,
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Object.assign(new state.Token("div_open", "div", 1), {
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// Add class "header-wrapper [h1 or h2 or h3]"
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attrs: [["class", `heading-wrapper ${state.tokens[idx].tag}`]],
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block: true,
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})
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);
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state.tokens.splice(idx + 4, 0,
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Object.assign(new state.Token("div_close", "div", -1), {
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block: true,
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})
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);
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linkAfterHeader(slug, opts, state, idx + 1);
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},
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};
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/* Markdown Overrides */
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markdownLibrary = markdownIt({
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html: true,
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linkify: true,
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})
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.set({ fuzzyLink: false })
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.use(markdownItAnchor, markdownItAnchorOptions)
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.use(markdownItAttribution)
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.use(markdownItAttrs)
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.use(markdownItBracketedSpans)
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.use(markdownItDefList)
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.use(markdownItFootnote);
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// Configure markdown-it-footnote
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markdownLibrary.renderer.rules.footnote_block_open = () => (
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'<hr class="footnotes-sep">\n' +
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'<section class="footnotes" aria-labelledby="footnotes">\n' +
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`<div class="heading-wrapper h2">
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<h2 id="footnotes" class="footnotes__title">Footnotes</h2>
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<a class="heading-anchor" href="#footnotes" aria-labelledby="footnotes"><span hidden="">#</span></a>
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</div>\n` +
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'<ol class="footnotes-list">\n'
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);
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markdownLibrary.renderer.rules.footnote_anchor = (tokens, idx, options, env, slf) => {
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let id = slf.rules.footnote_anchor_name(tokens, idx, options, env, slf);
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if (tokens[idx].meta.subId > 0) id += `:${tokens[idx].meta.subId}`;
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/* ↩ with escape code to prevent display as Apple Emoji on iOS */
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return `
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<p class="footnote-item__back">
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<a href="#fnref${id}" class="footnote-backref">
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<span aria-hidden="true">\u21a9\uFE0E</span>
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Back to reference ${id}
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</a>
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</p>
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`;
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};
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const renderRules = {
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footnote_caption: ['[', '[Note ']
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};
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Object.keys(renderRules).map(rule => {
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let defaultRender = markdownLibrary.renderer.rules[rule];
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markdownLibrary.renderer.rules[rule] = (tokens, idx, options, env, self) => {
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return defaultRender(tokens, idx, options, env, self).replace(...renderRules[rule]);
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}
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});
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/* This is the part that tells 11ty to swap to our custom config */
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eleventyConfig.setLibrary("md", markdownLibrary);
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}
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