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Best Possible way to pass value within components in React

Published Mar 26, 2023Last updated Jan 10, 2024
Best Possible way to pass value within components in React

There are a few different ways to pass values between components in React, depending on the situation and the desired behavior. Here are some common approaches:

Props:

The most common way to pass values between components is through props. Props are used to pass data from a parent component to a child component. The child component can access the prop values through this.props or by using destructuring. For example:

// Parent component
function Parent() {
  const message = "Hello, world!";
  return <Child message={message} />;
}

// Child component
function Child(props) {
  return <div>{props.message}</div>;
}

Context:

Context is a way to pass data to a tree of components without having to pass props manually at every level. Context provides a way to share values like a theme, locale, or authentication status between components without having to explicitly pass a prop through every level of the tree. For example:

const MyContext = React.createContext();

// Parent component
function Parent() {
  return (
    <MyContext.Provider value="Hello, world!">
      <Child />
    </MyContext.Provider>
  );
}

// Child component
function Child() {
  const message = React.useContext(MyContext);
  return <div>{message}</div>;
}

State lifting:

Sometimes, you may need to pass data between components that are not directly related as parent and child. In this case, you can lift the state up to a common ancestor and pass it down as props. For example:

// Grandparent component
function Grandparent() {
  const [count, setCount] = React.useState(0);
  return (
    <div>
      <Parent count={count} setCount={setCount} />
    </div>
  );
}

// Parent component
function Parent(props) {
  return (
    <div>
      <Child count={props.count} setCount={props.setCount} />
    </div>
  );
}

// Child component
function Child(props) {
  return (
    <div>
      <button onClick={() => props.setCount(props.count + 1)}>
        Increment count
      </button>
    </div>
  );
}

By following these approaches, you can pass values between components in React in a way that suits your use case and helps you build maintainable and scalable applications.

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