INNER CODE UNIT · TypeScript

extractFormulasFromOriginalDom

RyanYipeng/SyncCaster · apps/extension/src/content-scripts/index.ts:58

function extractFormulasFromOriginalDom(): Map<string, { tex: string; isDisplay: boolean }> {
  const formulaMap = new Map<string, { tex: string; isDisplay: boolean }>();
  const serializer = new XMLSerializer();
  const processed = new WeakSet<Element>();
  let index = 0;
  const hostname = window.location.hostname;
  const isZhihu = hostname.includes('zhihu.com');
  
  // 知乎专用公式提取
  if (isZhihu) {
    // 知乎使用 data-tex 属性存储 LaTeX
    document.querySelectorAll('[data-tex]').forEach((node) => {
      if (processed.has(node)) return;
      processed.add(node);
      
      const tex = node.getAttribute('data-tex')?.trim();
      if (tex) {
        const id = 'formula-' + (index++);

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