fiddle/public/js/emmet.js

let loaded = false;

function loadScript(src) {
  return new Promise((resolve, reject) => {
    if (document.querySelector(`script[src="${src}"]`)) { resolve(); return; }
    const savedDefine = window.define;
    window.define = undefined;
    const s = document.createElement('script');
    s.src = src;
    s.onload = () => { window.define = savedDefine; resolve(); };
    s.onerror = () => { window.define = savedDefine; reject(new Error(`Failed to load ${src}`)); };
    document.head.appendChild(s);
  });
}

export async function initEmmet() {
  if (loaded) return;
  try {
    await loadScript('https://unpkg.com/emmet-monaco-es/dist/emmet-monaco.min.js');
    if (window.emmetMonaco) {
      emmetMonaco.emmetHTML(monaco);
      emmetMonaco.emmetCSS(monaco);
      emmetMonaco.emmetJSX(monaco);
      loaded = true;
    }
  } catch (e) {
    console.warn('Emmet load failed:', e.message);
  }
}