What is event handler in JavaScript?

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In JavaScript, event handlers are functions that respond to specific user actions on a webpage, like clicking a button or hovering over an element. They play a vital role in creating interactive web pages by defining behavior for these actions. When a user interacts with a webpage, the associated event handler triggers instructions to execute tasks like changing element colors or submitting forms. Understanding how to effectively use event handlers is essential for JavaScript developers to build responsive web applications.
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