Function prepareFootnotes

plugins/_editor/webui/editor-preview.js:144–178

(markdown = "", fullMarkdown = markdown)

}

function prepareFootnotes(markdown = "", fullMarkdown = markdown) {
  const definitions = [];
  const body = [];
  for (const line of String(fullMarkdown || "").split("\n")) {
    const match = line.match(FOOTNOTE_DEF_RE);
    if (match) {
      definitions.push({ id: match[1], text: match[2] });
    }
  }
  for (const line of String(markdown || "").split("\n")) {
    if (line.match(FOOTNOTE_DEF_RE)) {
      continue;
    }
    body.push(line);
  }
  if (!definitions.length) return markdown;

  const counts = new Map();
  let prepared = body.join("\n").replace(/\[\^([^\]]+)\]/g, (_all, id) => {
    const number = definitions.findIndex((item) => item.id === id) + 1;
    if (number <= 0) return `[^${id}]`;
    const count = (counts.get(id) || 0) + 1;
    counts.set(id, count);
    const safeId = footnoteId(id);
    return `<sup class="editor-footnote-ref"><a id="fnref-${safeId}-${count}" href="#fn-${safeId}">${number}</a></sup>`;
  });

  prepared += "\n\n<section class=\"editor-footnotes\" aria-label=\"Footnotes\">\n<ol>\n";
  for (const definition of definitions) {
    const safeId = footnoteId(definition.id);
    prepared += `<li id="fn-${safeId}">${escapeHtml(definition.text)} <a class="editor-footnote-backref" href="#fnref-${safeId}-1">Back</a></li>\n`;
  }
  prepared += "</ol>\n</section>";
  return prepared;
}

function footnoteId(id = "") {
  return String(id || "")