How to Create a Sparkly-Spoiler Effect like the one in Threads Mobile App

If you use Meta’s Threads app on a mobile device, you may have noticed an interesting effect: the spoiler tag that hides text behind a sparkly veil. In this article, I will show you how to implement this effect in the browser using HTML, CSS, and JavaScript. NOTE: You can scroll to the bottom of this article to find the completed HTML, CSS, and JavaScript code if you don’t want to read the whole article. The Spoiler Effect on Threads in a Nutshell If you’re unfamiliar with the “spoiler” tag, it