The toJSON() method is a serializer that returns a JSON representation of the PerformanceResourceTiming object.
json = resourcePerfEntry.toJSON();
PerformanceResourceTiming object as a map with entries from the closest inherited interface and with entries for each of the serializable attributes.// Get a resource performance entry
var perfEntries = performance.getEntriesByType("resource");
var entry = perfEntries[0];
// Get the JSON and log it
var json = entry.toJSON();
var s = JSON.stringify(json);
console.log("PerformanceEntry.toJSON = " + s);
| Specification | Status | Comment |
|---|---|---|
| Resource Timing Level 1 The definition of 'toJSON' in that specification. | Candidate Recommendation | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 43 | Yes | 40 | No | 30 | 11 |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | 43 | 43 | Yes | 42 | 30 | 11 | 4.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceResourceTiming/toJSON