ReactJS › ReactJS - Keys and Ref › Question #4348
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QIf you create an element, you cannot change its ________.

ID: #4348 ReactJS - Keys and Ref 457 views
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#4348Q ID
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ReactJS - Keys and RefTopic
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  • A Events ✔ ✖
  • B Children and State ✔ ✖
  • C State ✔ ✖
  • D Children ✔ ✖
Correct Answer

Explanation

Option B is Not Correct - Children and State

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Batching of multiple setState() calls in a single update is possible. To Prevent firing of the component's lifecycle methods you can use null from render method. An altered component may be uniquely identified with the help of ref. Ref is used to refer an/a element/component returned by _______________. We can go for ________ when there is a possibility that our user could change the data. If our elements are dynamic, React can keep track of the changes using keys. Which lifecycle event is invoked before rendering and when new props or state is being received? Keys used within arrays should be globally unique.