Performance.clearMarks()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

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。

语法

js
clearMarks()
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。

返回值

无

示例

下面的例子演示 clearMarks() 的两种用法。

js
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();
}

规范

Specification
User Timing
# dom-performance-clearmarks

浏览器兼容性

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