When you need to change the prop value, the child component can send a signal — usually function call when a button is clicked or something similar — to the parent component to change the state. Both features are simply arbitrary variables that you can use to make your React components more dynamic. Props allow you to pass data from one component to other components as an argument. Meaning that a prop’s value can’t be changed no matter what happens. The following example will still output “John” instead of “Mark”: But what if you need variables that might change later? 3. This is because your component call is in JSX syntax, and you need to use curly brackets to write an expression. How to Create a Coin Flipping App using ReactJS? Also, we will see situations where state or props can be used. How to set the default value for an HTML
super(props); Props are immutable that is their content cannot be changed once assigned, but state is an object that is used to hold data that can change in the future, also state controls the behavior of the component after the change is made.
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