LayoutShift: hadRecentInput property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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

The hadRecentInput read-only property of the LayoutShift interface returns true if lastInputTime is less than 500 milliseconds in the past.

Layout shifts are only a problem if the user is not expecting them, so layout shifts that are the result of user interactions (such as a user expanding a UI element) are often not considered in layout shift metrics. The hadRecentInput property allows you to exclude these shifts.

Value

A boolean returning true if lastInputTime is less than 500 milliseconds in the past; false otherwise.

Examples

Ignoring recent user input for layout shift scores

The following example shows how the hadRecentInput property is used to only count layout shifts without recent user input.

js
const observer = new PerformanceObserver((list) => {
  for (const entry of list.getEntries()) {
    // Count layout shifts without recent user input only
    if (!entry.hadRecentInput) {
      console.log("LayoutShift value:", entry.value);
      if (entry.sources) {
        for (const { node, currentRect, previousRect } of entry.sources)
          console.log("LayoutShift source:", node, {
            currentRect,
            previousRect,
          });
      }
    }
  }
});

observer.observe({ type: "layout-shift", buffered: true });

Specifications

Specification
Layout Instability API
# dom-layoutshift-hadrecentinput

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
hadRecentInput
Experimental

Legend

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Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also