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handle multiple body scroll lockers

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taehoon 2019-10-17 16:03:41 -04:00
parent 8db1fa506c
commit 093d785fbf
1 changed files with 33 additions and 22 deletions
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55
src/directives/body_scroll_lock.js
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@ -2,42 +2,53 @@ import * as bodyScrollLock from 'body-scroll-lock'
let previousNavPaddingRight
let previousAppBgWrapperRight
let lockerEls = []
const disableBodyScroll = (el) => {
const scrollBarGap = window.innerWidth - document.documentElement.clientWidth
bodyScrollLock.disableBodyScroll(el, {
reserveScrollBarGap: true
})
if (!lockerEls.includes(el)) {
lockerEls.push(el)
}
setTimeout(() => {
// If previousNavPaddingRight is already set, don't set it again.
if (previousNavPaddingRight === undefined) {
const navEl = document.getElementById('nav')
previousNavPaddingRight = window.getComputedStyle(navEl).getPropertyValue('padding-right')
navEl.style.paddingRight = previousNavPaddingRight ? `calc(${previousNavPaddingRight} + ${scrollBarGap}px)` : `${scrollBarGap}px`
if (lockerEls.length <= 1) {
// If previousNavPaddingRight is already set, don't set it again.
if (previousNavPaddingRight === undefined) {
const navEl = document.getElementById('nav')
previousNavPaddingRight = window.getComputedStyle(navEl).getPropertyValue('padding-right')
navEl.style.paddingRight = previousNavPaddingRight ? `calc(${previousNavPaddingRight} + ${scrollBarGap}px)` : `${scrollBarGap}px`
}
// If previousAppBgWrapeprRight is already set, don't set it again.
if (previousAppBgWrapperRight === undefined) {
const appBgWrapperEl = document.getElementById('app_bg_wrapper')
previousAppBgWrapperRight = window.getComputedStyle(appBgWrapperEl).getPropertyValue('right')
appBgWrapperEl.style.right = previousAppBgWrapperRight ? `calc(${previousAppBgWrapperRight} + ${scrollBarGap}px)` : `${scrollBarGap}px`
}
document.body.classList.add('scroll-locked')
}
// If previousAppBgWrapeprRight is already set, don't set it again.
if (previousAppBgWrapperRight === undefined) {
const appBgWrapperEl = document.getElementById('app_bg_wrapper')
previousAppBgWrapperRight = window.getComputedStyle(appBgWrapperEl).getPropertyValue('right')
appBgWrapperEl.style.right = previousAppBgWrapperRight ? `calc(${previousAppBgWrapperRight} + ${scrollBarGap}px)` : `${scrollBarGap}px`
}
document.body.classList.add('scroll-locked')
})
}
const enableBodyScroll = (el) => {
if (lockerEls.includes(el)) {
lockerEls = lockerEls.filter(e => e !== el)
}
setTimeout(() => {
if (previousNavPaddingRight !== undefined) {
document.getElementById('nav').style.paddingRight = previousNavPaddingRight
// Restore previousNavPaddingRight to undefined so disableBodyScroll knows it can be set again.
previousNavPaddingRight = undefined
if (!lockerEls.length) {
if (previousNavPaddingRight !== undefined) {
document.getElementById('nav').style.paddingRight = previousNavPaddingRight
// Restore previousNavPaddingRight to undefined so disableBodyScroll knows it can be set again.
previousNavPaddingRight = undefined
}
if (previousAppBgWrapperRight !== undefined) {
document.getElementById('app_bg_wrapper').style.right = previousAppBgWrapperRight
// Restore previousAppBgWrapperRight to undefined so disableBodyScroll knows it can be set again.
previousAppBgWrapperRight = undefined
}
document.body.classList.remove('scroll-locked')
}
if (previousAppBgWrapperRight !== undefined) {
document.getElementById('app_bg_wrapper').style.right = previousAppBgWrapperRight
// Restore previousAppBgWrapperRight to undefined so disableBodyScroll knows it can be set again.
previousAppBgWrapperRight = undefined
}
document.body.classList.remove('scroll-locked')
})
bodyScrollLock.enableBodyScroll(el)
}