What causes the warning and how to track where Can only update a mounted or mounting component come from?

Question

React

warning.js:44 Warning: setState(...): Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the HomePage component.

Constantly crumbles. Looked like HomePage everything is OK there. Can't figure out how to track

Answer 1

Could you show me the code. It often occurs when setState is called on your timer, and the component has already been removed from the DOM (unmounted): you have moved to another page, for example.