![]() ![]() Megamenu_distance = $('#megamenu').offset(). When we select an element with jQuery, a jQuery object is returned with a collection of elements that match the specified selector. I'm sure there is room for improvement - so please correct me, I'll update accordingly. Here's an example that displays an alert on button click if the specified element exists. Example Here is the outcome screenshot and code to check if an element is visible in window viewport. Similarly element top can be obtained using (el).offset ().top and its height can be obtained using (el).height (). Logincollapse is my container div that holds the login form and other hidden content until the login button is clicked. length property to determine whether an element exists or not in case if you want to fire some event only if a particular element exists in DOM. Using jQuery cepedamarc jQuery Select 'next' until specific element is reached in Using jQuery 14 years ago I have a simple show/hide thing Im working on, but I cant figure out how to have the script show ALL the hidden rows up to the next heading. Window top can be obtained using (window).scrollTop () and height can be obtained using (window).height (). I came up with this to update the navbar position so if a user clicks 'login' and then scrolls, the navbar will correctly fix itself to the top. ![]() Here is the full example, let’s create example.html file with the following. We often apply this to the page which contains License Agreement section and we only want to enable the Submit button if the user scrolls the license section till the end. When the user scrolls down, I want the div to stay where it is until it reaches the top of the screen. This post shows you the way to detect if an HTML element is scrolled till the end using jQuery. So what? Well, now the position of my navbar has changed and if I don't update that position, when I scroll the navbar will fly up to the top of the browser - even though it's not really at the top. I have a div that is positioned about 100px from the top of the browser window. I also have a 'login' button on my page that when clicked, slides the navbar and all contents below it down to reveal the login form. I am using a Twitter Bootstrap Navbar for my primary navigation. Using the accepted answer above and also referencing the 'Learning from Twitter' link (thank you Sibler) I came up with the following. Not so much an answer, but could be helpful to someone else. ![]()
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