Is it possible to find a CSS property of a pseudo-class (like scrollbar pseudoclasses in Chrome) for an element styled with it? Here's an example:
<body><div #a></div></body>
<style>
#a::-webkit-scrollbar {
width: 10px
}
</style>
I attempted to use
getComputedStyle(domNode,'::-webkit-scrollbar').widthTo find the size of the scroll bar, subtract the element's offset by its client size.
var myDiv = document.getElement...
var verticalScrollBarWidth = myDiv.offsetWidth - myDiv.clientWidth;
var horizontalScrollBarHeight = myDiv.offsetHeight - myDiv.clientHeight;
These are two properties:
Object.defineProperty(HTMLElement, "verticalScrollBarWidth", {
get: function() {
var tmpWidth = HTMLElement.offsetWidth - HTMLElement.clientWidth;
if (tmpWidth > 0)
return tmpWidth;
return -1;
},
set: undefined
});
Object.defineProperty(HTMLElement, "horizontalScrollBarHeight", {
get: function() {
var tmpHeight = HTMLElement.offsetHeight - HTMLElement.clientHeight;
if (tmpHeight > 0)
return tmpHeight;
return -1;
},
set: undefined
});
How to use it:
var myDiv = document.getElement...
var vScrollBarWidth = myDiv.verticalScrollBarWidth;
var hScrollBarWidth = myDiv.horizontalScrollBarHeight;
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