If you're implementing animations or visual effects, it's important to determine if an element is visible before applying the animation or effect to it.
Checking the visibility of an element can help optimize the performance of your web page or application. You can minimize unnecessary processing and improve overall performance by selectively applying actions or calculations only to visible elements.
This code checks if two elements, identified by their IDs "top_ele" and "bottom_ele", are visible within the viewport of a web page. It uses the getBoundingClientRect method to get the position and size of each element, and then compares it with the dimensions of the viewport. The function isElementInViewPort returns true if an element is completely visible in the viewport, and false otherwise. The results are logged to the console for the "top_ele" and "bottom_ele" elements.