I am trying to invoke a callback via intersection observer.    I want the target to be style: "position: fixed" and move it via style.top.    I also specified the root element which is an ancestor of the target with style: "position: rela...
I need to create a list with drag and drop reordering in HTML/Js where overlap/intersection of elements is detected like here:    I'm currently looking at the Intersection Observer API to detect when list items are overlapping, but most tuts and...
Trying to understand a quirk in intersectionObserver API.  If an observed element is partially on screen but has not met the threshold defined in the options I would expect the call back not to fire, but it does. Trying to understand why or how to pr...
IntersectionObserver is fairly new, experimental API, and at this moment is not fully supported by all browsers.  It will have many uses, but for now the most prominent one is lazy-loading your images, that is if you have them plenty on your website....
I want a callback to be called when a specific DOM node enters the viewport.  Additionally I have the following situation:   aFarkas/lazysizes is used on the page. Intersection Observer API is not implemented in some of the Browsers that need to be s...
I'm looking for some help, I'm trying to recreate the homepage on this site.  https://madebyarticle.com/  I don't want to use Jquery, either Plain JS or Vue.  I've got it to do most what I want it to but have a few issues.  Codepen Ex...
I'm using the IntersectionObserver to add and remove classes to elements as they enter the viewport.  Instead of saying "when X% of the element is visible - add this class" I would like to say "when X% of the element is visible or whe...
How would I pass an extra argument to the IntersectionObserver? I am trying to create a lazyload plugin for Vue. It works fine like this but I also want to be able to call a provided directive function.  const lazyload = {     install(Vue) {...
I am using the Intersection Observer API to help me with a parallax effect. So far everything work well except for one scenario:  When the image is already visible and in the middle of the page, as long as the image it not intersecting with the edge...
I come across two cases where the navigation bar items are selected automatically when I scroll to certain section. How do I achieve that? I'm looking for a solution which is up to date of 2018 and as simple as possible(vanilla JS or without extr...

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