Remove event listener once it’s invoked in JavaScript

The usual way of adding event-listener on certain elements is using the addEventListener method on the element. For instance, if you want to register a click event on an element with id checkoutBtn, you can do it like so. const checkoutBtn = document.getElementById('checkoutBtn'); checkoutBtn.addEventListener('click', function() { alert('You clicked the checkout button.'); }); This will register a click event and the callback function will be called whenever the specified event is delivere...

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