Change8
Error1 reports

Fix ExpressionChangedAfterItHasBeenCheckedError

in Angular

Solution

The ExpressionChangedAfterItHasBeenCheckedError usually happens when a component's input changes after Angular's change detection cycle has already rendered the view. To fix this, consider using `setTimeout` to delay the change or implementing `OnChanges` to respond to input changes synchronously within the change detection cycle. Verify you're not performing actions that trigger further updates within the view rendering phase itself.

Related Issues

Real GitHub issues where developers encountered this error:

Timeline

First reported:Dec 9, 2025
Last reported:Dec 9, 2025

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