React ref is null on first render. Aug 14, 2022 · ref is a reserved property on...
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React ref is null on first render. Aug 14, 2022 · ref is a reserved property on build-in primitives, where React will store the DOM node after it was rendered. By passing observed in the array and by passing a callback that logs observed to the console, the useEffect hook can be leveraged to accomplish your task. Read the article for insights. And during the rendering of updates, the DOM nodes haven’t been updated yet. Thanks for the link to the previous issue and the caveats. current will be null. current property only after the component has rendered and the DOM node has been created. That's why you always need to check if the ref is null before you use it. It gets its actual value after React commits the changes to the DOM. This applies to when you switch to the other component and back to dataArea, as when you switch away react sets it to null when it unmounts since the element reference is gone from the DOM.
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