Performance: clearMarks() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2017.
Note: This feature is available in Web Workers.
The clearMarks() method removes all or specific PerformanceMark objects from the browser's performance timeline.
Syntax
js
clearMarks() clearMarks(name) Parameters
nameOptional-
A string representing the
nameof thePerformanceMarkobject. If this argument is omitted, all entries with anentryTypeof"mark"will be removed.
Return value
None (undefined).
Examples
Removing markers
To clean up all performance marks, or just specific entries, use the clearMarks() method like this:
js
// Create a bunch of marks performance.mark("login-started"); performance.mark("login-started"); performance.mark("login-finished"); performance.mark("form-sent"); performance.mark("video-loaded"); performance.mark("video-loaded"); performance.getEntriesByType("mark").length; // 6 // Delete just the "login-started" mark entries performance.clearMarks("login-started"); performance.getEntriesByType("mark").length; // 4 // Delete all of the mark entries performance.clearMarks(); performance.getEntriesByType("mark").length; // 0 Specifications
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| User Timing # dom-performance-clearmarks |