PerformanceEntry.entryType

The entryType property returns a DOMString representing the type of performance metric such as, for example, "mark". This property is read only.

Note: This feature is available in Web Workers.

Syntax

var type = entry.entryType;

Return value

The return value depends on the subtype of the PerformanceEntry object and affects the value of the PerformanceEntry.name property as shown by the table below. 

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

 

Example

The following example shows the use of the entryType property.

function run_PerformanceEntry() {

  // check for feature support before continuing
  if (performance.mark === undefined) {
    console.log("performance.mark not supported");
    return;
  }

  // Create a performance entry named "begin" via the mark() method
  performance.mark("begin");
  
  // Check the entryType of all the "begin" entries
  var entriesNamedBegin = performance.getEntriesByName("begin");
	for (var i=0; i < entriesNamedBegin.length; i++) {
      var typeOfEntry = entriesNamedBegin[i].entryType;
      console.log("Entry is type: " + typeOfEntry);
  }

}

Specifications

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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes Yes Yes Yes No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes25 Yes No ?

Document Tags and Contributors

Last updated by: fscholz,