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React.js MCQs

What will happen if this code is present in ReactJs component written as ES6 class: shouldComponentUpdate(nextProps, nextState) { return false; }

Component will not render any visuals

Component will not render any changes

Throw error because shouldComponentUpdate must return true at least once per lifecycle of the component

Display warning but will continue to work. This is useful for testing without actually rendering components.

Answer

Correct Answer: Component will not render any changes

Explanation:

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