When building interactive web applications, it is crucial to be able to respond to user interactions such as clicks, mouse movements, and key presses. This is where event handling comes into play.

Event handling is the process of writing code that executes in response to specific events, such as a button click or a form submission. In JavaScript, you can handle events using the addEventListener() method.

Let's take an example of event handling with a button click. First, we need to select the button element from the DOM. We can do this using the querySelector() method and providing the CSS selector for the button element.

1const button = document.querySelector('#myButton');

Next, we use the addEventListener() method to attach an event listener function to the button. This function will be executed when the button is clicked.

1button.addEventListener('click', () => {
2  console.log('Button clicked!');
3});

In the example above, the event listener function simply logs a message to the console when the button is clicked. You can replace the console.log() statement with any code that you want to execute in response to the event.

By utilizing event handling in your web applications, you can create dynamic and interactive user experiences. Whether it's updating the UI, validating form inputs, or making asynchronous requests, event handling is an essential skill for frontend development.

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// Example of event handling

const button = document.querySelector('#myButton');

​

button.addEventListener('click', () => {

  console.log('Button clicked!');

});