CenterOn

CenterOn is a JavaScript library designed to help developers easily center elements on a web page. It provides a simple and intuitive API to position an element precisely in the middle of its containing block, whether that container is the viewport or another HTML element. The library handles the complexities of calculating offsets and applying CSS properties to achieve true centering.

The core functionality of CenterOn is accessed through a single function. Developers typically select the element they wish to center using standard DOM manipulation methods and then pass that element to the CenterOn function. The library can center an element both horizontally and vertically. It's particularly useful for modal dialogs, pop-up windows, images, or any content that needs to be consistently placed in the center of the screen or a specific area.

CenterOn works by dynamically adjusting the `top`, `left`, `marginLeft`, and `marginTop` CSS properties of the targeted element. It accounts for the dimensions of the element itself to ensure accurate centering. The library is lightweight and has minimal dependencies, making it easy to integrate into existing projects. It aims to provide a straightforward solution to a common web development challenge, reducing the need for manual CSS calculations or more complex layout techniques.