Скачать или смотреть Window Scroll Event NOT Working | Debugging Event Listener

In this video, we will debug an event listener. Events are many: mouse events, touch events, keyboard events, form events, window events, document events and more. We are dealing with Window Event Listener in jQuery. Similar approach can be used in vanilla JavaScript. window load is an event, that is triggered when the page content is loaded. Window resize is an event, that is triggered when browser window is resized. Window scroll is an event that is triggered when user scrolls down a web page. You can add different event listeners to read these events when they get triggered in web browser.

Why do you need to read these events? May be you want to perform some kind of action when user scrolls down. You have seen sticky header example, right? When user scrolls down, header sticks to the top of window and moves below as user scrolls down the page. May be you want to perform some action when window is resized to a certain device width. So this is why events are very important. Events are there and you can read them or catch them as they happen. These help in DOM manipulation effectively.

We want to detect if user scrolls down the page. Really simple task. We will create the HTML page, CSS file and JS file. We will see if we can detect the window scroll or not.

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