The components in React will re-render only if the state of the component or the props passed to it changes but if we need to re-render the component if some data changes then we will use forceUpdate() method of React. Calling the forceUpdate() will forcibly re-render the component and thus calls the render() method of the component skipping the shouldComponentUpdate() method.
Tip: Normally, avoid all uses of forceUpdate() and only read from this.props and this.state in render().
While there are certainly some use cases for using the forceUpdate() method but it’s better to use hooks, props, state, and context to re-render the component whenever you need.
Creating React Application:
Step 1: Create a React application using the following command:
npx create-react-app functiondemo
Step 2: After creating your project folder i.e. functiondemo, move to it using the following command:
Project Structure: It will look like the following.
Example: In this example, we are going to build a React application that re-render the component when the button is clicked by calling the forceUpdate() method.
App.js: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.
Note: You can apply your own styling to the application.
Step to Run Application: Run the application using the following command from the root directory of the project: