The initiatorType
read-only 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 (""
).
Note: This feature is available in Web Workers.
Syntax
resource.initiatorType;
Return value
A string
representing the type of resource that initiated the performance event, as specified above.
Example
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 Level 1 The definition of 'initiatorType' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
initiatorType | Chrome Full support 43 | Edge Full support 12 | Firefox Full support 40 | IE No support No | Opera Full support 30 | Safari Full support 11 | WebView Android Full support 43 | Chrome Android Full support 43 | Firefox Android Full support 42 | Opera Android Full support 30 | Safari iOS Full support 11 | Samsung Internet Android Full support 4.0 |
Legend
- Full support
- Full support
- No support
- No support