Performance: clearMarks() method

{{APIRef("Performance API")}} {{AvailableInWorkers}} 

The clearMarks() method removes all or specific {{domxref("PerformanceMark")}}  objects from the browser’s performance timeline.

Syntax

clearMarks()
clearMarks(name)

Parameters

• name {{optional_inline}} 
  • : A string representing the {{domxref("PerformanceEntry.name", "name")}}  of the {{domxref("PerformanceMark")}}  object. If this argument is omitted, all entries with an {{domxref("PerformanceEntry.entryType","entryType")}}  of "mark" will be removed.

Return value

None ({{jsxref("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

{{Specifications}} 

Browser compatibility

{{Compat}} 

See also

• {{domxref("PerformanceMark")}}