In JavaScript, events are occurrences or happenings that take place in the browser, such as a user clicking a button, a page finishing loading, or an input field being changed. Handling events is an essential part of building interactive web applications. Here are some ways to use events in JavaScript:

1. Inline HTML Event Handling: You can attach events directly to HTML elements using attributes like onclick, onmouseover, etc. For example:

   html
   <button onclick="myFunction()">Click me</button>
   

   In this example, when the button is clicked, the myFunction JavaScript function will be called.

2. DOM Event Handling: You can also handle events using JavaScript in a separate script. This is often the preferred method as it separates HTML and JavaScript logic. For example:

   html
   <button id="myButton">Click me</button>
   
   <script>
     document.getElementById('myButton').addEventListener('click', function() {
       alert('Button clicked!');
     });
   </script>
   

   This script adds an event listener to the button element, so when it's clicked, the provided function (in this case, an alert) will be executed.

3. Event Object: When an event occurs, an event object is created. This object contains information about the event and can be passed to the event handler function. For example:

   html
   <button id="myButton">Click me</button>
   
   <script>
     document.getElementById('myButton').addEventListener('click', function(event) {
       alert('Button clicked! Event type: ' + event.type);
     });
   </script>
   

   In this example, the event object is used to access information about the event, such as its type.

4. Remove Event Listeners: It's important to manage event listeners, especially if elements are dynamically added or removed from the page. You can use the removeEventListener method to remove an event listener. For example:

   html
   <button id="myButton">Click me</button>
   
   <script>
     function handleClick(event) {
       alert('Button clicked!');
       document.getElementById('myButton').removeEventListener('click', handleClick);
     }
   
     document.getElementById('myButton').addEventListener('click', handleClick);
   </script>
   

   In this example, the handleClick function is removed as an event listener after the button is clicked once.

These are basic examples to get you started with event handling in JavaScript. Depending on your project and the libraries or frameworks you're using, there are more advanced patterns and techniques you can explore.