Learn how to create a pulsating heart animation using CSS and Javascript, toggling between Font Awesome's `fa-heart-o` and `fa-heart` icons. --- This video is based on the question https://stackoverflow.com/q/63452877/ asked by the user 'RePsEj' ( https://stackoverflow.com/u/13833164/ ) and on the answer https://stackoverflow.com/a/63453014/ provided by the user 'Greedo' ( https://stackoverflow.com/u/11829408/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Start a css animation and finish with another icon using (fa-awesome) Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Create a Pulsating Heart Animation using CSS and Font Awesome If you've ever wanted to add some interactive flair to your website, a pulsating heart icon can be a charming choice! In this guide, we'll go through the process of creating a smooth CSS animation that toggles between a hollow heart (fa-heart-o) and a solid heart (fa-heart) each time it's clicked. We will use plain CSS coupled with JavaScript to achieve this effect. The Problem Statement The goal here is to create a fa-heart-o icon that, when clicked, animates with a pulse effect, switching to a solid heart, and vice versa on additional clicks. The initial implementation you're working with successfully handles the pulse animation but struggles to switch between the two heart icons when the animation completes. Let's break down the solution step by step. Step 1: Implement the Heart Animation We will start by using CSS to create the pulse animation effect. Here's how to set it up: CSS Animation Setup [[See Video to Reveal this Text or Code Snippet]] Keyframes: The @ keyframes fa-pulse-click defines the scale changes during the animation. .fa Class: This gives the icon proper size and allows it to be clickable. Step 2: Create the HTML Structure Now, we need a simple HTML structure to display our heart icons. Here's a brief snippet to illustrate this: [[See Video to Reveal this Text or Code Snippet]] Tooltip: The heart icon is wrapped in a tooltip for better user interaction. Step 3: JavaScript Logic Now, let’s jump into the core JavaScript functionality that handles the toggle and animation logic. Here’s the complete code to add to your script: [[See Video to Reveal this Text or Code Snippet]] Explanation of the JavaScript Functions: startAni(elem): This function triggers the animation effect on the heart icon when it is clicked. If the animation is still running, it resets the state. animate(elem): After the pulse effect, this function switches the class from fa-heart-o to fa-heart, or vice versa. Final Thoughts With this setup, you've created a beautiful pulsating heart animation that provides instant feedback for user interaction! Feel free to adjust the animation duration and effects to suit your design needs. Try it out on your projects and enjoy adding a touch of liveliness with the help of CSS and Font Awesome icons!