PerformanceEntry.entryType

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

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.

Performance entry type names

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

Browser compatibility