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`	`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
Performance Timeline # dom-performanceentry-name

Browser compatibility

BCD tables only load in the browser