React props can be passed conditionally Instead, within the component that prop will have a value of undefined . If you would like to be alerted to when a value is not passed as a prop to a component, you can use a tool like prop-types or TypeScript using these tools.
Read moreHow do you define a state in React?
The state is an instance of React Component Class can be defined as an object of a set of observable properties that control the behavior of the component . In other words, the State of a component is an object that holds some information that may change over the lifetime of the component.
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