How to Handle the `Onkeypress` Event in Reactjs?

How to handle the `onKeyPress` event in ReactJS?

ReactJS is a popular JavaScript library used for building user interfaces. When working with ReactJS, you may come across the need to handle keyboard events, such as the `onKeyPress` event. In this blog post, we will explore different ways to handle the `onKeyPress` event in ReactJS.

1. Using Inline Event Handler

One way to handle the `onKeyPress` event in ReactJS is by using an inline event handler. This involves defining the event handler directly in the JSX code.

{`import React from 'react';

function MyComponent() {
  const handleKeyPress = (event) => {
    console.log('Key pressed:', event.key);
  };

  return (
    
  );
}`}

In the above example, we define a function called `handleKeyPress` that logs the pressed key to the console. We then attach this function to the `onKeyPress` event of the input element.

2. Using Class Component

If you are using a class component in ReactJS, you can handle the `onKeyPress` event by defining a class method.

{`import React from 'react';

class MyComponent extends React.Component {
  handleKeyPress(event) {
    console.log('Key pressed:', event.key);
  }

  render() {
    return (
      
    );
  }
}`}

In this example, we define a class component called `MyComponent` with a method called `handleKeyPress`. The method logs the pressed key to the console. We then attach this method to the `onKeyPress` event of the input element.

3. Using React Hooks

If you are using functional components with React Hooks, you can handle the `onKeyPress` event using the `useEffect` and `useState` hooks.

{`import React, { useState, useEffect } from 'react';

function MyComponent() {
  const [keyPressed, setKeyPressed] = useState('');

  useEffect(() => {
    const handleKeyPress = (event) => {
      setKeyPressed(event.key);
    };

    window.addEventListener('keypress', handleKeyPress);

    return () => {
      window.removeEventListener('keypress', handleKeyPress);
    };
  }, []);

  return (
    

      
      Key pressed: {keyPressed}
    
  );
}`}

In this example, we use the `useState` hook to create a state variable called `keyPressed` and a setter function called `setKeyPressed`. We also use the `useEffect` hook to add and remove the event listener for the `keypress` event. When a key is pressed, the `handleKeyPress` function updates the `keyPressed` state variable, which is then displayed in the paragraph element.

These are three different ways to handle the `onKeyPress` event in ReactJS. Choose the one that best suits your project and coding style.