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React unable to find node on an unmounted component

Unable to find node on an unmounted component.

React tried to access a DOM node associated with a component that has already been unmounted, which usually points to stale refs or imperative logic firing too late.

React error #188runtime

Observed message

Unable to find node on an unmounted component.

Why it happens

  • Imperative code is trying to read or mutate a node after the component unmounted.
  • A stale ref, timeout, or async callback runs after cleanup.
  • Unmount timing changed while DOM access logic still assumes the component is mounted.

How to fix it

  1. Cancel timers, subscriptions, and async callbacks during cleanup.
  2. Check refs before using them and avoid assuming the component is still mounted.
  3. Move DOM access into safer lifecycle or effect timing with proper cleanup.

Official reference

React Docs: Minified React error #188

Related errors

React error #426React component suspended while responding to synchronous inputReact error #187React flushSync called inside a lifecycle methodReact error #307React Hooks called outside a function componentReact error #404React invalid hook call

Explore more

ReactBrowse more React errorsruntimeBrowse more runtime errors
React error #188 unable to find node on an unmounted component | Error Atlas