jQuery .animate() optimization guide as expected on multiple elements with different durations
I'm writing unit tests and I'm collaborating on a project where I've encountered a strange issue with I'm refactoring my project and I'm following best practices but I tried several approaches but none seem to work... I'm working with an scenario with jQuery's `.animate()` method when trying to animate multiple elements with different durations. I have a list of items that I want to fade in and slide up at different speeds. Here’s the code I’m using: ```javascript $('.item').each(function(index) { $(this).delay(index * 500).animate({ opacity: 1, top: '-=100px' }, 1000); }); ``` However, the animations are overlapping in a way that they don't seem to respect the delay I set, and I see multiple items animating at the same time instead of sequentially. I also receive a warning in the console saying, "undefined is not a function" when I try to chain another `.animate()` after this one, which might be related. I've tried wrapping the `.animate()` call in a `setTimeout` for each item but that didn't seem to help either. This is particularly frustrating because I want the animations to be smooth and properly staggered. I'm using jQuery version 3.6.0. Can someone guide to understand what’s going wrong here and how I can fix it to achieve the desired sequential animation effect? This is part of a larger web app I'm building. Any ideas what could be causing this? I'm developing on Linux with Javascript. Is there a better approach? Is there a simpler solution I'm overlooking? Thanks for your help in advance! I'm on Debian using the latest version of Javascript. Any pointers in the right direction? I'd really appreciate any guidance on this. The stack includes Javascript and several other technologies. I'd really appreciate any guidance on this.