How do you add event listeners in JavaScript?

In JavaScript, you can add event listeners to DOM elements using the addEventListener method.

The addEventListener method allows you to specify a function (known as an event handler) that will be executed when a specific event occurs on the DOM element.

Syntax for adding an event listener:

element.addEventListener(eventType, eventHandler);

where element is the DOM element to which you want to add the event listener, eventType is a string representing the type of event you want to listen for (e.g., “click”, “keydown”, “change”, etc.), and eventHandler is the function that will be executed when the event occurs.

Example:

Here’s an example of adding an event listener for a “click” event:

const button = document.getElementById("myButton"); // Get the DOM element by its ID
button.addEventListener("click", function () {
  // Add event listener for "click" event
  console.log("Button clicked!"); // Event handler function
});

In this example, the button element is selected using getElementById method, and then an event listener is added using addEventListener to listen for the “click” event. When the button is clicked, the event handler function (in this case, an anonymous function) will be executed, which logs a message to the console.

Note:

Note that you can also remove event listeners using the removeEventListener method by passing the same event type and event handler function that was used when adding the event listener. This can be useful if you want to remove an event listener from a DOM element after it has been added.

Thank you for reading, and let’s have conversation with each other

Thank you for reading my article. Let’s have conversation on Twitter and LinkedIn by connecting.