Web/API/PerformanceEntry/name

The name property of the PerformanceEntry interface returns a value that further specifies the value returned by the PerformanceEntry.entryType property. This property is read only.

Note: This feature is available in Web Workers.

Syntax

var name = entry.name;

Return value

The return value depends on the subtype of the PerformanceEntry object and the value of PerformanceEntry.entryType, as shown by the table below.

Value	Subtype	entryType values	Description
`URL`	`PerformanceFrameTiming`, `PerformanceNavigationTiming`	`frame`, `navigation`	The document's address.
`URL`	`PerformanceResourceTiming`	`resource`	The resolved URL of the requested resource. This value doesn't change even if the request is redirected.
`DOMString`	`PerformanceMark`	`mark`	The name used when the mark was created by calling `performance.mark()`.
`DOMString`	`PerformanceMeasure`	`measure`	name used when the measure was created by calling `performance.measure()`.
`DOMString`	`PerformancePaintTiming`	`paint`	Either `'first-paint'` or `'first-contentful-paint'`.

Example

The following example shows the use of the name property.

function run_PerformanceEntry() {
  log("PerformanceEntry support ...");

  if (performance.mark === undefined) {
    log("... performance.mark Not supported");
    return;
  }

  // Create some performance entries via the mark() method
  performance.mark("Begin");
  do_work(50000);
  performance.mark("End");

  // Use getEntries() to iterate through the each entry
  var p = performance.getEntries();
  for (var i=0; i < p.length; i++) {
    log("Entry[" + i + "]");
    check_PerformanceEntry(p[i]);
  }
}
function check_PerformanceEntry(obj) {
  var properties = ["name", "entryType", "startTime", "duration"];
  var methods = ["toJSON"];

  for (var i=0; i < properties.length; i++) {
    // check each property
    var supported = properties[i] in obj;
    if (supported)
      log("..." + properties[i] + " = " + obj[properties[i]]);
    else 
      log("..." + properties[i] + " = Not supported");
  }
  for (var i=0; i < methods.length; i++) {
    // check each method
    var supported = typeof obj[methods[i]] == "function";
    if (supported) {
      var js = obj[methods[i]]();
      log("..." + methods[i] + "() = " + JSON.stringify(js));
    } else {
      log("..." + methods[i] + " = Not supported");
    }
  }
}

Specifications

Specification	Status	Comment
Performance Timeline Level 2The definition of 'name' in that specification.	Candidate Recommendation
Performance TimelineThe definition of 'name' in that specification.	Recommendation	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`name`	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support 11	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 25	Opera Android Full support Yes	Safari iOS Full support 11	Samsung Internet Android Full support Yes

Legend

Full support: Full support

PerformanceEntry.name by Mozilla Contributors is licensed under CC-BY-SA 2.5.