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.
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 # dom-layoutshift-hadrecentinput |
Browser compatibility
BCD tables only load in the browser