How can we access any value from css such as "height:20px" using javascript

Question

I want to access width of a shape designed on css and want to access its value using javascript

Answer 1

Refer to Mozilla official documents
https://developer.mozilla.org/en-US/docs/Web/API/Window/getComputedStyle

Answer 2

Use object.getComputedStyle(element,pseudo-element).getPropertyValue(propertyname)

https://www.w3schools.com/jsref/jsref_getcomputedstyle.asp