Display Length of the Input Text in React

by Abdul Rawoof A R Updated: Jan 24, 2023

In this kit, we're going to see how to display length of the input text in React with simple steps. We have one text field in the output, there we can able to give input as text as much as we need. Below that it will show the length of the text what you have given in the text field. We can give any number inputs to the text field and it will shows the length of the text what we have given. React allow us to handle this task easier. To implement this task, use the ready-made code snippet below by just copying the code and paste it in your IDE with react library. Explore more top trending libraries and code snippet on kandi.

Fig : Preview of the output that you will get on running this code from your IDE.

Code

In this solution, we're using React library.

How can I update a paragraph tag in REACT when an input field is changed?

Lines of Code : 32License : CC BY-SA 4.0

class App extends Component {
  constructor() {
    this.state = {
      textLength: 0,
      text: '',
    }
  }
  textLengthHandler = (event) => {
    let length = 0;
    const text = event.target.value;
    if (event) {
      length = text.length
    };
    console.log("length is " + length);
    this.setState({
      textLength: length,
      text: text,
    });
  }

  render() {
    return (
      <div className="App">
        <input type='text' onChange={this.textLengthHandler} value={this.state.text}/>
        <p>length is {this.state.textLength}</p>
      </div>
    );
  }
}

export default App;

Instructions

Follow the steps carefully to get the output easily.

Install the Node.js and React on your IDE(preferable Visual Studio Code).
Create React Application using npx create-react-app foldername.
cd foldername.
Open the folder in IDE.
Copy the code using "copy" button above and paste it in app.js file(remove the earlier code from app.js).
Import React and Component in app.js file.
Add super() keyword(in the 4th line) inside constructor(refer preview of the output as well).
Open the terminal from IDE.
npm start to run the file.

I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.

I found this code snippet by searching for 'how can i update paragraph tag in react when input field is changed' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

The solution is created in Visual Studio Code 1.73.1.
The solution is tested on node v18.12.1 and npm v8.19.2.
React version-18.2.0.

Using this solution, we are able to display length of the input text in react with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to display length of the input text in react.