Web Reference: 1 day ago · shouldComponentUpdate () is a React class component lifecycle method that decides whether a component should re-render when props or state change. Returning true allows a re-render, while false prevents it, helping optimize performance. Invoked before every render to check if an update is necessary. In the shouldComponentUpdate() method you can return a Boolean value that specifies whether React should continue with the rendering or not. The default value is true. React automatically calls shouldComponentUpdate, it is triggered before the re-rendering process starts (in this case of your parent component.) So naturally it is called frequently.
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