portal trick on bz-select options
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STEINNI
+15
-3
@@ -41,7 +41,17 @@ bz-select > div.options-container{
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transition: max-height 0.4s ease;
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}
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bz-select > div.options-container.open{ pointer-events: auto; max-height: 10em;}
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bz-select option{
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div.options-container.portaled{
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pointer-events: none;
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position: fixed;
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z-index: 10000;
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max-height: 0;
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overflow: auto;
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transition: max-height 0.4s ease;
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}
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div.options-container.portaled.open{ pointer-events: auto; max-height: 10em;}
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bz-select option,
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div.options-container option{
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background-color: #DDD;
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border: 1px solid black;
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color: #000;
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@@ -57,12 +67,14 @@ bz-select option{
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margin-top 0.3s ease,
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opacity 0.3s ease;
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}
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bz-select option.open{
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bz-select option.open,
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div.options-container option.open{
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margin: 0;
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opacity: 1;
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pointer-events: auto;
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}
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bz-select option:hover{
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bz-select option:hover,
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div.options-container option:hover{
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background-color: #44F;
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color: #FFF;
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}
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+107
-13
@@ -74,7 +74,7 @@ class BZselect extends Buildoz {
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if(!this.optionscontainer) this.optionscontainer = document.createElement('div')
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this.optionscontainer.classList.add('options-container')
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this.append(this.optionscontainer)
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this.options = this.querySelectorAll('option')
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this.syncOptions()
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if(this.#fillFromMarkup){ //can only do it once and only if fillOptions was not already called !!
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for(const opt of this.options){
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this.optionscontainer.append(opt) // Will move is to the right parent
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@@ -86,6 +86,15 @@ class BZselect extends Buildoz {
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}
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disconnectedCallback() {
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if(this.open || this._closing) this.closeDropdown(true)
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}
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syncOptions() {
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if(this.optionscontainer) this.options = this.optionscontainer.querySelectorAll('option')
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else this.options = []
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}
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// static get observedAttributes(){ // Only if you want actions on attr change
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// return([...super.observedAttributes, 'disabled'])
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// }
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@@ -111,19 +120,104 @@ class BZselect extends Buildoz {
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}
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toggle(){
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for(const opt of this.options){
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if(this.open) {
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opt.classList.remove('open')
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this.optionscontainer.classList.remove('open')
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} else {
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if(this.open) this.closeDropdown()
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else this.openDropdown()
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}
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openDropdown() {
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document.querySelectorAll('bz-select').forEach((sel) => {
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if((sel!==this) && sel.open) sel.toggle()
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if((sel!==this) && sel.open) sel.closeDropdown(true)
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})
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opt.classList.add('open')
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this.optionscontainer.classList.add('portaled')
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document.body.appendChild(this.optionscontainer)
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this.positionPortal()
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this.bindPortalListeners()
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this.open = true
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requestAnimationFrame(() => {
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requestAnimationFrame(() => {
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if(!this.open) return
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this.optionscontainer.classList.add('open')
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for(const opt of this.options) opt.classList.add('open')
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})
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})
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}
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closeDropdown(immediate = false) {
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if(!this.open) return
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this.unbindPortalListeners()
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for(const opt of this.options) opt.classList.remove('open')
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this.optionscontainer.classList.remove('open')
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if(immediate) {
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this.clearCloseTransition()
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this.finishCloseDropdown()
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return
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}
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this._closing = true
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this._onTransitionEnd = (evt) => {
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if(evt.target !== this.optionscontainer) return
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if(evt.propertyName !== 'max-height') return
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this.finishCloseDropdownAfterTransition()
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}
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this.optionscontainer.addEventListener('transitionend', this._onTransitionEnd)
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this._closeTimer = setTimeout(() => this.finishCloseDropdownAfterTransition(), 450)
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}
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finishCloseDropdownAfterTransition() {
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if(!this._closing) return
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this.clearCloseTransition()
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this.finishCloseDropdown()
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}
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clearCloseTransition() {
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this._closing = false
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if(this._closeTimer) clearTimeout(this._closeTimer)
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this._closeTimer = null
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if(this._onTransitionEnd) {
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this.optionscontainer.removeEventListener('transitionend', this._onTransitionEnd)
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this._onTransitionEnd = null
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}
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}
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this.open = !this.open
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finishCloseDropdown() {
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this.optionscontainer.classList.remove('portaled')
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this.clearPortalStyles()
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if(this.optionscontainer.parentElement !== this) this.append(this.optionscontainer)
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this.open = false
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}
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positionPortal() {
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const rect = this.button.getBoundingClientRect()
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this.optionscontainer.style.top = `${rect.bottom}px`
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this.optionscontainer.style.left = `${rect.left}px`
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this.optionscontainer.style.width = `${rect.width}px`
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}
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clearPortalStyles() {
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this.optionscontainer.style.top = ''
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this.optionscontainer.style.left = ''
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this.optionscontainer.style.width = ''
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}
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bindPortalListeners() {
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this._repositionBound = this.positionPortal.bind(this)
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window.addEventListener('scroll', this._repositionBound, true)
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window.addEventListener('resize', this._repositionBound)
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this._outsideClickBound = (evt) => {
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if(this.open && !this.contains(evt.target) && !this.optionscontainer.contains(evt.target)) {
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this.closeDropdown()
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}
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}
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this._outsideClickTimer = setTimeout(() => {
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document.addEventListener('click', this._outsideClickBound, true)
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}, 0)
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}
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unbindPortalListeners() {
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if(this._repositionBound) window.removeEventListener('scroll', this._repositionBound, true)
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if(this._repositionBound) window.removeEventListener('resize', this._repositionBound)
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if(this._outsideClickBound) document.removeEventListener('click', this._outsideClickBound, true)
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if(this._outsideClickTimer) clearTimeout(this._outsideClickTimer)
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this._outsideClickTimer = null
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}
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onClick(evt){
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@@ -135,7 +229,7 @@ class BZselect extends Buildoz {
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onOption(value, silent=false){
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if(this.getAttribute('disabled') !== null) return
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this.value = value
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if(!silent) this.toggle()
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if(!silent && this.open) this.closeDropdown()
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}
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addOption(value, markup){
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@@ -146,16 +240,16 @@ class BZselect extends Buildoz {
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opt.addEventListener('click',this.onClick.bind(this))
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if(!this.optionscontainer) this.optionscontainer = document.createElement('div')
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this.optionscontainer.append(opt)
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this.options = this.querySelectorAll('option')
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this.syncOptions()
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this.#fillFromMarkup = false
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}
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fillOptions(opts, erase = true){
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// Caution: you cannot count on connectedCallback to have run already, because one might fill before adding to the DOM
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if(erase){
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this.options = this.querySelectorAll('option')
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this.syncOptions()
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this.options.forEach(node => { node.remove() })
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this.options = this.querySelectorAll('option')
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this.syncOptions()
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this.onOption('', true) // unselect last
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}
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for(const opt of opts) this.addOption(opt.value, opt.markup)
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