Dataview: List internal links by header, with one row per link per header

[Amberg]

For those looking for something similar, this works for me:

(async () => {
  const synonyms = new Set(["mängd", "mängder", "mängden", "universala mängden", "universalmängden", "universumsmängden"]);

  const pages = dv.pages(
    '"Årskurs 2/Läsperiod 4/Sannolikhetsteori och statistisk signalbehandling/Föreläsningar"'
  );

  const hits = [];
  for (const p of pages) {
    const text  = await dv.io.load(p.file.path);
    const lines = text.split(/\r?\n/);
    let section = "";

    for (const line of lines) {
      const headMatch = line.match(/^\s*#{1,6}\s+(.*)$/);
      if (headMatch) {
        section = headMatch[1].trim();
        continue;
      }
      const linkRe = /\[\[([^\]|#]+)(?:#[^\]|]+)?(?:\|[^\]]+)?\]\]/g;
      let m;
      while ((m = linkRe.exec(line)) !== null) {
        const rawTarget = m[1].trim();
        const target    = rawTarget.toLowerCase();
        if (synonyms.has(target)) {
          hits.push({
            file:    p.file,
            section,
            term:    rawTarget
          });
        }
      }
    }
  }

  const unique = Array.from(
    hits.reduce((map, h) => {
      const key = `${h.file.path}#${h.section}#${h.term}`;
      if (!map.has(key)) map.set(key, h);
      return map;
    }, new Map()).values()
  );

    dv.table(
	    ["Föreläsning", "Rubrik", "Term"],
		unique.map(h => [
	    h.file.link,
	    `[[${h.file.path}#${h.section}|${h.section}]]`,
	    h.term.toLowerCase()
			])
		);
})();

which gives