PerformanceResourceTiming.initiatorType
The initiatorType
property is a string
that represents the type of resource that initiated the performance event. The value of this string is as follows:
- If the initiator is a
Element
, the property returns the element'slocalName
. - If the initiator is a
CSS
resource, the property returns "css
". - If the initiator is a
XMLHttpRequest
object, the property returns "xmlhttprequest
". - If the initiator is a
PerformanceNavigationTiming
object, the property returns an empty string (""
).
This property is Read only .
Syntax
JavaScript
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resource.initiatorType;
Return value
A string
representing the type of resource that initiated the performance event, as specified above.
Example
JavaScript
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function print_PerformanceEntries() { // Use getEntriesByType() to just get the "resource" events var p = performance.getEntriesByType("resource"); for (var i=0; i < p.length; i++) { print_initiatorType(p[i]); } } function print_initiatorType(perfEntry) { // Print this performance entry object's initiatorType value var value = "initiatorType" in perfEntry; if (value) console.log("... initiatorType = " + perfEntry.initiatorType); else console.log("... initiatorType = NOT supported"); }
Specifications
Specification | Status | Comment |
---|---|---|
Resource Timing The definition of 'initiatorType' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support. | 43 | 40 | 10 | 32 | No support |
Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support. | 4.4 | 42 | ? | 10.0 | 32 | No support |
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/performanceresourcetiming/initiatortype