How to find the width of a div using vanilla JavaScript?

Question

How do you find the current width of a

in a cross-browser compatible way without using a library like jQuery?

Answer 1

All Answers are right, but i still want to give some other alternatives that may work.

If you are looking for the assigned width (ignoring padding, margin and so on) you could use.

getComputedStyle(element).width; //returns value in px like "727.7px"

getComputedStyle allows you to access all styles of that elements. For example: padding, paddingLeft, margin, border-top-left-radius and so on.