How to Retrieve the Value of a CSS Property in JavaScript

If you are looking to obtain the value of a CSS property in a web page that is set using a stylesheet, you may be wondering how to achieve this using JavaScript. The style property of an element will not suffice since it only returns CSS properties defined inline or dynamically, and not those defined in an external stylesheet. Thankfully, there is a solution: the getComputedStyle() function. This global function allows you to retrieve the computed style of an element, including properties defined in stylesheets....