在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

clearResourceTimings() 方法移除所有 performance entries 采用 entryType of " resource " from the browser's performance data buffer and sets the size of the performance data buffer to zero. To set the size of the browser's performance data buffer, use the Performance.setResourceTimingBufferSize() 方法。

注意： 此特征可用于 Web 工作者 .

句法

performance.clearResourceTimings();
					

自变量

void

返回值

none

This method has no return value.

范例

function load_resource() {
  var image = new Image();
  image.src = "https://developer.mozilla.org/static/img/opengraph-logo.png";
}
function clear_performance_timings() {
  if (performance === undefined) {
    log("Browser does not support Web Performance");
    return;
  }
  // Create a resource timing performance entry by loading an image
  load_resource();
  var supported = typeof performance.clearResourceTimings == "function";
  if (supported) {
    console.log("Run: performance.clearResourceTimings()");
    performance.clearResourceTimings();
  } else {
    console.log("performance.clearResourceTimings() NOT supported");
    return;
  }
  // getEntries should now return zero
  var p = performance.getEntriesByType("resource");
  if (p.length == 0)
    console.log("... Performance data buffer cleared");
  else
    console.log("... Performance data buffer NOT cleared!");
}
					

规范

规范	状态	注释
Resource Timing Level 1 The definition of 'clearResourceTimings()' in that specification.	候选推荐	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
clearResourceTimings	Chrome 46 46 22 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari 11	WebView Android 46 46 ? — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android 46 46 25 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android Yes	Opera Android Yes	Safari iOS 11	Samsung Internet Android 5.0 5.0 1.5 — 7.0 Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持

完整支持

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

元数据

• 最后修改： Apr 4, 2019

相关话题

1. 资源计时 API
2. 性能
3. 特性

   1. navigation
   2. onresourcetimingbufferfull
   3. timeOrigin
   4. timing
4. 方法

   1. clearMarks()
   2. clearMeasures()
   3. clearResourceTimings()
   4. getEntries()
   5. getEntriesByName()
   6. getEntriesByType()
   7. mark()
   8. measure()
   9. now()
   10. setResourceTimingBufferSize()
   11. toJSON()
5. 事件

   1. resourcetimingbufferfull
6. Related pages for Resource Timing API

   1. PerformanceEntry
   2. PerformanceResourceTiming
   3. Window.performance