Performance.clearMarks()

clearMarks() 这个方法可以从浏览器的performance entry 缓存中移除声明的标记。如果调用这个方法时没有传递参数，则所有带有entry type这类标记的performance entries 将从 performance entry 缓存区中被移除。

用法

performance.clearMarks();
performance.clearMarks(name);

参数

name 可选: DOMString 表示时间戳的名字,如果没有提供这个参数，则所有带有entry type这类标记的performance entries 将从 performance entry 缓存区中被移除。

例子

下面的例子演示clearMarks() 的两种用法。

function clear_mark(name) {
  if (performance.clearMarks === undefined) {
    console.log("performance.clearMarks Not supported");
    return;
  }
  //移除所有标记了此名称的peformance entry
  performance.clearMarks(name);
}
function clear_all_marks() {
  if (performance.clearMarks === undefined) {
    console.log("performance.clearMarks Not supported");
    return;
  }
  //从performance 缓冲区中移除所有标记的performance entry
  performance.clearMarks();
}

说明

说明	状态	备注
User Timing Level 2 clearMarks()	Working Draft	Clarifies `clearMarks()`.
User Timing clearMarks()	Recommendation	Basic definition.

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)

Desktop
Mobile

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	43.0	(Yes)	41	10	33	未实现

Feature	Android	Android Webview	Edge	Firefox Mobile (Gecko)	Firefox OS	IE Phone	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	未实现	46.0	(Yes)	42	42	10	33	未实现	46.0

Performance.clearMarks()

用法

参数

返回值

例子

说明

浏览器兼容性