performance.clearResourceTimings()

The clearResourceTimings() method removes all performance entries with an entryType of "resource" from the browser's performance data buffer and sets the size of the performance data buffer to zero. To set the size of the browser's performance data buffer, use the Performance.setResourceTimingBufferSize() method.

Note: This feature is available in Web Workers

Syntax

clearResourceTimings()

Parameters

None.

Return value

none

Examples

function load_resource() {
  const image = new Image();
  image.src = "https://developer.mozilla.org/static/img/opengraph-logo.png";
}
function clear_performance_timings() {
  if (performance === undefined) {
    log("Browser does not support Web Performance");
    return;
  }
  // Create a resource timing performance entry by loading an image
  load_resource();

  const supported = typeof performance.clearResourceTimings === "function";
  if (supported) {
    console.log("Run: performance.clearResourceTimings()");
    performance.clearResourceTimings();
  } else {
    console.log("performance.clearResourceTimings() NOT supported");
    return;
  }
  // getEntries should now return zero
  const p = performance.getEntriesByType("resource");
  if (p.length === 0) {
    console.log("… Performance data buffer cleared");
  } else {
    console.log("… Performance data buffer NOT cleared!");
  }
}

Specifications

Specification
Resource Timing Level 2
# dom-performance-clearresourcetimings

Browser compatibility

BCD tables only load in the browser