在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

mark() method creates a timestamp in the browser's performance entry buffer with the given name.

The application defined timestamp can be retrieved by one of the 性能 接口的 getEntries*() methods ( getEntries() , getEntriesByName() or getEntriesByType() ).

mark()'s stores its data internally as PerformanceEntry .

注意： 此特征可用于 Web 工作者 .

句法

performance.mark(name);
					

自变量

名称

DOMString representing the name of the mark. 若 名称 given to this method already exists in the PerformanceTiming interface, SyntaxError is thrown.

返回值

void

范例

The following example shows how to use mark() to create and retrieve PerformanceMark 条目。

// Create a bunch of marks.
performance.mark("squirrel");
performance.mark("squirrel");
performance.mark("monkey");
performance.mark("monkey");
performance.mark("dog");
performance.mark("dog");
// Get all of the PerformanceMark entries.
const allEntries = performance.getEntriesByType("mark");
console.log(allEntries.length);
// 6
// Get all of the "monkey" PerformanceMark entries.
const monkeyEntries = performance.getEntriesByName("monkey");
console.log(monkeyEntries.length);
// 2
// Clear out all of the marks.
performance.clearMarks();
					

规范

规范	状态	注释
User Timing Level 2 The definition of 'mark()' in that specification.	工作草案	Clarifies mark() processing model.
User Timing The definition of 'mark()' in that specification.	推荐	Basic definition.

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
mark	Chrome 28 28 25 — 28 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 41	IE 10	Opera 33	Safari 11	WebView Android Yes	Chrome Android 28 28 25 — 28 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android 42	Opera Android 33	Safari iOS 11	Samsung Internet Android 1.5

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： Jun 27, 2020

相关话题

1. 性能
2. 特性

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

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

   1. resourcetimingbufferfull
5. Related pages for User Timing API

   1. PerformanceEntry
   2. PerformanceMark
   3. PerformanceMeasure