yyzone/src/mixins/scrollbar.js

yyzone vue components and utils

import { getScrollBarSize } from '../utils/assist'
export default {
    methods: {
        checkScrollBar () {
            let fullWindowWidth = window.innerWidth
            if (!fullWindowWidth) { // workaround for missing window.innerWidth in IE8
                const documentElementRect = document.documentElement.getBoundingClientRect()
                fullWindowWidth = documentElementRect.right - Math.abs(documentElementRect.left)
            }
            this.bodyIsOverflowing = document.body.clientWidth < fullWindowWidth
            if (this.bodyIsOverflowing) {
                this.scrollBarWidth = getScrollBarSize()
            }
        },
        checkMaskInVisible () {
            let masks = document.getElementsByClassName('yy-modal-mask') || []
            return Array.from(masks).every(m => m.style.display === 'none' || m.classList.contains('fade-leave-to'))
        },
        setScrollBar () {
            if (this.bodyIsOverflowing && this.scrollBarWidth !== undefined) {
                document.body.style.paddingRight = `${this.scrollBarWidth}px`
            }
        },
        resetScrollBar () {
            document.body.style.paddingRight = ''
        },
        addScrollEffect () {
            this.checkScrollBar()
            this.setScrollBar()
            document.body.style.overflow = 'hidden'
        },
        removeScrollEffect() {
            if (this.checkMaskInVisible()) {
                document.body.style.overflow = ''
                this.resetScrollBar()
            }
        }
    }
}