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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The PerformanceLongTaskTiming interface of the the Long Tasks API reports instances of long tasks.
<div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/PerformanceLongTaskTiming" target="_top"><rect x="1" y="1" width="250" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text x="126" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">PerformanceLongTaskTiming</text></a></svg></div>
a:hover text { fill: #0095DD; pointer-events: all;}
Properties
PerformanceLongTaskTiming.attributionRead only- Returns a sequence of
TaskAttributionTiminginstances.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Unknown The definition of 'PerformanceLongTaskTiming' in that specification. |
Unknown | Initial definition. |
Browser Compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 58 | ? | ? | ? | ? |
| Feature | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | 58 | 58 | ? | ? | ? | ? | ? |