W3cubDocs

/Web APIs

Performance: clearMarks() method

The clearMarks() method removes all or specific PerformanceMark objects from the browser's performance timeline.

Syntax

clearMarks()
clearMarks(name)

Parameters

name Optional: A string representing the name of the PerformanceMark object. If this argument is omitted, all entries with an entryType of "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:

// 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

Specification
User Timing # dom-performance-clearmarks

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`clearMarks`	2925–29	12	38	10	33	11	4.4	2925–29	42	33	11	2.01.5–2.0