Dynamic elements: Event delegation also works well with dynamically generated elements.This is because the browser doesn’t have to spend time attaching and removing event listeners on each child element. Increased performance: Because you’re attaching a single event listener to the parent element, your code will be more performant.Event delegation allows you to attach a single event listener to the parent element, which uses less memory. Reduced memory usage: Attaching multiple event listeners to child elements can use up a lot of memory, which can slow down your application.Yes, event delegation is generally considered a good practice in JavaScript, especially when you have a large number of child elements that need to handle the same type of event. This approach can lead to cleaner and more efficient code, especially when dealing with a large number of child elements. We then check if the event.target element has a class of "child" using the ntains() method, and if it does, we log a message to the console.īy using event delegation, we can handle events on multiple child elements with a single event listener attached to the parent element. In the event listener function, we use the event.target property to determine which child element triggered the event.
Instead of attaching an event listener to each child element, we attach a single event listener to the parent element using the addEventListener() method. In this example, we have a parent element with a class of “parent” and multiple child elements with a class of “child”.
An example const parentElement = document.querySelector('.parent') parentElement.addEventListener('click', function(event) ) Explanation This allows you to handle events on multiple child elements with a single event listener attached to the parent element. When an event occurs on a child element, the event bubbles up to the parent element, which can then use the event object to determine which child element triggered the event. Instead of attaching an event listener to each individual child element, you attach a single event listener to the parent element and use it to listen for events that occur on the child elements. Event delegation in JavaScript is a technique that allows you to handle events on multiple elements with a single event listener attached to their parent element.
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