How to set focus on an input field after rendering in ReactJS ?
Last Updated :
05 Jan, 2021
Setting focus on an input field after rendering in ReactJS can be done in the following ways, but before doing that, set up your project structure with the following steps:
Creating React Application:
Step 1: Create a React application using the following command:
npx create-react-app foldername
Step 2: After creating your project folder i.e. foldername, move to it using the following command:
cd foldername
Project Structure: It will look like the following.
Project Structure
Approach 1: we can do it in componentDidMount() function and refs callback. For example:
componentDidMount() {
this.nameInput.focus();
}
Filename: App.js
Javascript
import React, { Component } from "react" ;
class App extends Component {
componentDidMount() {
this .nameInput.focus();
}
render() {
return (
<div>
<input
defaultValue= "It Won't focus"
/>
<input
ref={(input) => { this .nameInput = input; }}
defaultValue= "It will focus"
/>
</div>
);
}
}
export default App;
|
Approach 2: If we just want to focus on an element when it mounts (initially renders) a simple use of the autoFocus attribute will do. we can use the autoFocus prop to have an input automatically focus when mounted.
Filename: App.js
Javascript
import React, { Component } from "react" ;
class App extends Component {
render() {
return (
<div>
<input
defaultValue= "It Won't focus"
/>
<input autoFocus
defaultValue= "It will focus"
/>
</div>
);
}
}
export default App;
|
Approach 3: We can use the below syntax using the inline ref property.
<input ref={input => input && input.focus()}/>
Filename: App.js
Javascript
import React, { Component } from "react" ;
class App extends Component {
render() {
return (
<div>
<input
defaultValue= "It Won't focus"
/>
<input
ref={(input) => {input && input.focus() }}
defaultValue= "It will focus"
/>
</div>
);
}
}
export default App;
|
Step to Run Application: Run the application using the following command from the root directory of the project:
npm start
Output:
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