[html] 怎样计算首屏和白屏的时间？

function showPaintTimings() {
  if (window.performance) {
    let performance = window.performance;
    let performanceEntries = performance.getEntriesByType('paint');
    performanceEntries.forEach( (performanceEntry, i, entries) => {
      console.log("The time to " + performanceEntry.name + " was " + performanceEntry.startTime + " milliseconds.");
    });
  } else {
    console.log('Performance timing isn\'t supported.');
  }
}

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我是歌谣，欢迎和大家一起交流前后端知识。放弃很容易，
但坚持一定很酷。欢迎大家一起讨论

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与歌谣一起通关前端面试题