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import SimpleBarCore from 'simplebar-core'; |
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|
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const { getOptions, addClasses, canUseDOM } = SimpleBarCore.helpers; |
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|
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export default class SimpleBar extends SimpleBarCore { |
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static globalObserver: MutationObserver; |
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|
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static instances = new WeakMap<Node, SimpleBar>(); |
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|
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constructor(...args: ConstructorParameters<typeof SimpleBarCore>) { |
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super(...args); |
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|
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// // Save a reference to the instance, so we know this DOM node has already been instancied |
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SimpleBar.instances.set(args[0], this); |
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} |
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|
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static initDOMLoadedElements() { |
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document.removeEventListener( |
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'DOMContentLoaded', |
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this.initDOMLoadedElements |
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); |
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window.removeEventListener('load', this.initDOMLoadedElements); |
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|
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Array.prototype.forEach.call( |
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document.querySelectorAll('[data-simplebar]'), |
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(el) => { |
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if ( |
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el.getAttribute('data-simplebar') !== 'init' && |
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!SimpleBar.instances.has(el) |
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) |
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new SimpleBar(el, getOptions(el.attributes)); |
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} |
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); |
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} |
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|
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static removeObserver() { |
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SimpleBar.globalObserver?.disconnect(); |
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} |
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|
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initDOM() { |
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// make sure this element doesn't have the elements yet |
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if ( |
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!Array.prototype.filter.call(this.el.children, (child) => |
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child.classList.contains(this.classNames.wrapper) |
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).length |
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) { |
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// Prepare DOM |
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this.wrapperEl = document.createElement('div'); |
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this.contentWrapperEl = document.createElement('div'); |
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this.offsetEl = document.createElement('div'); |
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this.maskEl = document.createElement('div'); |
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this.contentEl = document.createElement('div'); |
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this.placeholderEl = document.createElement('div'); |
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this.heightAutoObserverWrapperEl = document.createElement('div'); |
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this.heightAutoObserverEl = document.createElement('div'); |
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addClasses(this.wrapperEl, this.classNames.wrapper); |
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addClasses(this.contentWrapperEl, this.classNames.contentWrapper); |
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addClasses(this.offsetEl, this.classNames.offset); |
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addClasses(this.maskEl, this.classNames.mask); |
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addClasses(this.contentEl, this.classNames.contentEl); |
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addClasses(this.placeholderEl, this.classNames.placeholder); |
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addClasses( |
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this.heightAutoObserverWrapperEl, |
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this.classNames.heightAutoObserverWrapperEl |
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); |
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addClasses( |
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this.heightAutoObserverEl, |
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this.classNames.heightAutoObserverEl |
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); |
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|
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while (this.el.firstChild) { |
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this.contentEl.appendChild(this.el.firstChild); |
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} |
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|
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this.contentWrapperEl.appendChild(this.contentEl); |
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this.offsetEl.appendChild(this.contentWrapperEl); |
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this.maskEl.appendChild(this.offsetEl); |
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this.heightAutoObserverWrapperEl.appendChild(this.heightAutoObserverEl); |
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this.wrapperEl.appendChild(this.heightAutoObserverWrapperEl); |
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this.wrapperEl.appendChild(this.maskEl); |
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this.wrapperEl.appendChild(this.placeholderEl); |
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this.el.appendChild(this.wrapperEl); |
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|
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this.contentWrapperEl?.setAttribute( |
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'tabindex', |
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this.options.tabIndex.toString() |
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); |
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this.contentWrapperEl?.setAttribute('role', 'region'); |
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this.contentWrapperEl?.setAttribute('aria-label', this.options.ariaLabel); |
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} |
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|
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if (!this.axis.x.track.el || !this.axis.y.track.el) { |
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const track = document.createElement('div'); |
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const scrollbar = document.createElement('div'); |
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|
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addClasses(track, this.classNames.track); |
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addClasses(scrollbar, this.classNames.scrollbar); |
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|
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track.appendChild(scrollbar); |
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|
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this.axis.x.track.el = track.cloneNode(true) as HTMLElement; |
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addClasses(this.axis.x.track.el, this.classNames.horizontal); |
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|
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this.axis.y.track.el = track.cloneNode(true) as HTMLElement; |
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addClasses(this.axis.y.track.el, this.classNames.vertical); |
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|
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this.el.appendChild(this.axis.x.track.el); |
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this.el.appendChild(this.axis.y.track.el); |
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} |
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|
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SimpleBarCore.prototype.initDOM.call(this); |
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|
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this.el.setAttribute('data-simplebar', 'init'); |
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} |
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|
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unMount() { |
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SimpleBarCore.prototype.unMount.call(this); |
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SimpleBar.instances.delete(this.el); |
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} |
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|
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static initHtmlApi() { |
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this.initDOMLoadedElements = this.initDOMLoadedElements.bind(this); |
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|
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// MutationObserver is IE11+ |
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if (typeof MutationObserver !== 'undefined') { |
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// Mutation observer to observe dynamically added elements |
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this.globalObserver = new MutationObserver(SimpleBar.handleMutations); |
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|
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this.globalObserver.observe(document, { childList: true, subtree: true }); |
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} |
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|
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// Taken from jQuery `ready` function |
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// Instantiate elements already present on the page |
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if ( |
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document.readyState === 'complete' || // @ts-ignore: IE specific |
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(document.readyState !== 'loading' && !document.documentElement.doScroll) |
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) { |
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// Handle it asynchronously to allow scripts the opportunity to delay init |
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window.setTimeout(this.initDOMLoadedElements); |
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} else { |
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document.addEventListener('DOMContentLoaded', this.initDOMLoadedElements); |
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window.addEventListener('load', this.initDOMLoadedElements); |
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} |
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} |
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|
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static handleMutations(mutations: MutationRecord[]) { |
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mutations.forEach((mutation) => { |
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mutation.addedNodes.forEach((addedNode) => { |
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if (addedNode.nodeType === 1) { |
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if ((addedNode as Element).hasAttribute('data-simplebar')) { |
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!SimpleBar.instances.has(addedNode) && |
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document.documentElement.contains(addedNode) && |
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new SimpleBar( |
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addedNode as HTMLElement, |
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getOptions((addedNode as Element).attributes) |
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); |
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} else { |
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(addedNode as Element) |
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.querySelectorAll('[data-simplebar]') |
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.forEach((el) => { |
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if ( |
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el.getAttribute('data-simplebar') !== 'init' && |
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!SimpleBar.instances.has(el) && |
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document.documentElement.contains(el) |
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) |
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new SimpleBar(el as HTMLElement, getOptions(el.attributes)); |
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}); |
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} |
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} |
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}); |
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|
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mutation.removedNodes.forEach((removedNode) => { |
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if (removedNode.nodeType === 1) { |
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if ( |
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(removedNode as Element).getAttribute('data-simplebar') === 'init' |
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) { |
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!document.documentElement.contains(removedNode) && |
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SimpleBar.instances.get(removedNode)?.unMount(); |
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} else { |
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Array.prototype.forEach.call( |
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(removedNode as Element).querySelectorAll( |
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'[data-simplebar="init"]' |
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), |
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(el) => { |
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!document.documentElement.contains(el) && |
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SimpleBar.instances.get(el)?.unMount(); |
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} |
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); |
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} |
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} |
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}); |
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}); |
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} |
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} |
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|
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/** |
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* HTML API |
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* Called only in a browser env. |
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*/ |
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if (canUseDOM) { |
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SimpleBar.initHtmlApi(); |
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} |
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|
