cloud-ui.vusion/src/components/f-scroll-view.vue/js/scrollbar-width.js

Vusion Cloud UI

let scrollBarWidth;

export default function () {
    if (scrollBarWidth !== undefined) {
        return scrollBarWidth;
    }

    const outer = document.createElement('div');
    outer.className = 'f-scroll-view__wrap';
    outer.style.visibility = 'hidden';
    outer.style.width = '100px';
    outer.style.position = 'absolute';
    outer.style.top = '-9999px';
    document.body.appendChild(outer);

    const widthNoScroll = outer.offsetWidth;
    outer.style.overflow = 'scroll';

    const inner = document.createElement('div');
    inner.style.width = '100%';
    outer.appendChild(inner);

    const widthWithScroll = inner.offsetWidth;
    outer.parentNode.removeChild(outer);
    scrollBarWidth = widthNoScroll - widthWithScroll;
    return scrollBarWidth;
}