This question explores JavaScript and addresses practical considerations related to: What is event delegation in JavaScript?

Event delegation is a technique in JavaScript that allows you to manage events efficiently by setting a single event listener on a parent element to handle events triggered by its child elements. This is particularly useful for handling events on dynamically added elements. document.getElementById("parent").addEventListener("click", function(event) { if (event.target && event.target.matches("button.child")) { console.log("Child button clicked!"); } }); ADDITIONAL COMMENT: - The event listener is added to the "parent" element. - Inside the event handler, "event.target" is used to determine which child element triggered the event. - The "matches" method checks if the clicked element matches the specified selector, in this case, "button.child". - This approach reduces the number of event listeners and is efficient for managing events on multiple child elements. ✅

What is event delegation in JavaScript?

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What is event delegation in JavaScript?

Asked on Jul 31, 2025

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Event delegation is a technique in JavaScript that allows you to manage events efficiently by setting a single event listener on a parent element to handle events triggered by its child elements. This is particularly useful for handling events on dynamically added elements.

<!-- BEGIN COPY / PASTE -->
        document.getElementById("parent").addEventListener("click", function(event) {
            if (event.target && event.target.matches("button.child")) {
                console.log("Child button clicked!");
            }
        });
        <!-- END COPY / PASTE -->

Additional Comment:

The event listener is added to the "parent" element.
Inside the event handler, "event.target" is used to determine which child element triggered the event.
The "matches" method checks if the clicked element matches the specified selector, in this case, "button.child".
This approach reduces the number of event listeners and is efficient for managing events on multiple child elements.

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What is event delegation in JavaScript?

Asked on Jul 31, 2025

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