forked from treehouse/mastodon
37 lines
840 B
JavaScript
37 lines
840 B
JavaScript
|
import { isMobile } from '../is_mobile';
|
||
|
|
|
||
|
|
/** @type {number | null} */
|
||
|
|
let cachedScrollbarWidth = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return {number}
|
||
|
|
*/
|
||
|
|
const getActualScrollbarWidth = () => {
|
||
|
|
const outer = document.createElement('div');
|
||
|
|
outer.style.visibility = 'hidden';
|
||
|
|
outer.style.overflow = 'scroll';
|
||
|
|
document.body.appendChild(outer);
|
||
|
|
|
||
|
|
const inner = document.createElement('div');
|
||
|
|
outer.appendChild(inner);
|
||
|
|
|
||
|
|
const scrollbarWidth = outer.offsetWidth - inner.offsetWidth;
|
||
|
|
outer.parentNode.removeChild(outer);
|
||
|
|
|
||
|
|
return scrollbarWidth;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return {number}
|
||
|
|
*/
|
||
|
|
export const getScrollbarWidth = () => {
|
||
|
|
if (cachedScrollbarWidth !== null) {
|
||
|
|
return cachedScrollbarWidth;
|
||
|
|
}
|
||
|
|
|
||
|
|
const scrollbarWidth = isMobile(window.innerWidth) ? 0 : getActualScrollbarWidth();
|
||
|
|
cachedScrollbarWidth = scrollbarWidth;
|
||
|
|
|
||
|
|
return scrollbarWidth;
|
||
|
|
};
|