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.

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 Time Level 2
The definition of 'name' in that specification.
Editor's Draft  
Performance Timeline
The definition of 'name' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support. (Yes) (Yes) (Yes) (Yes) (Yes) No support
Feature Android Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support. (Yes) (Yes) 25.0 (25.0) 1.2 (25.0) 10.0 (Yes) No support

Document Tags and Contributors

 Contributors to this page: jpmedley, abbycar, rolfedh, AFBarstow
 Last updated by: jpmedley,