js生成uuid

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function generateUUID() {
  let d = new Date().getTime();
  if (typeof performance !== 'undefined' && typeof performance.now === 'function'){
    d += performance.now(); // 使用性能测量获取更高分辨率
  }
  
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    const r = (d + Math.random()*16)%16 | 0;
    d = Math.floor(d/16);
    return (c === 'x' ? r : (r&0x3|0x8)).toString(16);
  });
}

const uuid = generateUUID();
console.log(uuid);