W3cubDocs

/Web APIs

LayoutShiftAttribution: toJSON() method

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Syntax

js

toJSON()

Parameters

None.

Return value

A JSON object that is the serialization of the LayoutShiftAttribution object.

Examples

The following example prints a JSON representation of the first item in LayoutShift.sources to the console.

js

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

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
toJSON 84 84 No No 70 No 84 84 No 60 No 14.0

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/LayoutShiftAttribution/toJSON