LayoutShiftAttribution: toJSON() method

{{APIRef("Performance API")}}{{SeeCompatTable}}

The toJSON() method of the {{domxref("LayoutShiftAttribution")}} interface is a serializer that returns a JSON representation of the LayoutShiftAttribution object.

Syntax

toJSON()

Parameters

None.

Return value

A JSON object that is the serialization of the {{domxref("LayoutShiftAttribution")}} object.

Examples

The following example prints a JSON representation of the first item in {{domxref("LayoutShift.sources")}} to the console.

new PerformanceObserver((list) => {
  for (const { sources } of list.getEntries()) {
    if (sources) {
      console.log(sources[0].toJSON());
    }
  }
}).observe({ type: "layout-shift", buffered: true });

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}