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260 lines
12 KiB
260 lines
12 KiB
/* |
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* Created by David Adams |
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* https://codeshack.io/multi-select-dropdown-html-javascript/ |
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* |
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* Released under the MIT license |
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*/ |
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class MultiSelect { |
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constructor(element, options = {}) { |
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let defaults = { |
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placeholder: 'Select item(s)', |
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max: null, |
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search: true, |
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selectAll: true, |
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listAll: true, |
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closeListOnItemSelect: false, |
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name: '', |
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width: '', |
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height: '', |
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dropdownWidth: '', |
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dropdownHeight: '', |
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data: [], |
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onChange: function() {}, |
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onSelect: function() {}, |
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onUnselect: function() {} |
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}; |
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this.options = Object.assign(defaults, options); |
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this.selectElement = typeof element === 'string' ? document.querySelector(element) : element; |
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for(const prop in this.selectElement.dataset) { |
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if (this.options[prop] !== undefined) { |
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this.options[prop] = this.selectElement.dataset[prop]; |
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} |
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} |
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this.name = this.selectElement.getAttribute('name') ? this.selectElement.getAttribute('name') : 'multi-select-' + Math.floor(Math.random() * 1000000); |
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if (!this.options.data.length) { |
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let options = this.selectElement.querySelectorAll('option'); |
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for (let i = 0; i < options.length; i++) { |
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this.options.data.push({ |
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value: options[i].value, |
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text: options[i].innerHTML, |
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selected: options[i].selected, |
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html: options[i].getAttribute('data-html') |
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}); |
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} |
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} |
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this.element = this._template(); |
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this.selectElement.replaceWith(this.element); |
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this._updateSelected(); |
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this._eventHandlers(); |
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} |
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_template() { |
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let optionsHTML = ''; |
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for (let i = 0; i < this.data.length; i++) { |
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optionsHTML += ` |
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<div class="multi-select-option${this.selectedValues.includes(this.data[i].value) ? ' multi-select-selected' : ''}" data-value="${this.data[i].value}"> |
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<span class="multi-select-option-radio"></span> |
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<span class="multi-select-option-text">${this.data[i].html ? this.data[i].html : this.data[i].text}</span> |
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</div> |
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`; |
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} |
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let selectAllHTML = ''; |
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if (this.options.selectAll === true || this.options.selectAll === 'true') { |
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selectAllHTML = `<div class="multi-select-all"> |
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<span class="multi-select-option-radio"></span> |
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<span class="multi-select-option-text">Select all</span> |
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</div>`; |
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} |
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let template = ` |
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<div class="multi-select ${this.name}"${this.selectElement.id ? ' id="' + this.selectElement.id + '"' : ''} style="${this.width ? 'width:' + this.width + ';' : ''}${this.height ? 'height:' + this.height + ';' : ''}"> |
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${this.selectedValues.map(value => `<input type="hidden" name="${this.name}[]" value="${value}">`).join('')} |
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<div class="multi-select-header" style="${this.width ? 'width:' + this.width + ';' : ''}${this.height ? 'height:' + this.height + ';' : ''}"> |
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<span class="multi-select-header-max">${this.options.max ? this.selectedValues.length + '/' + this.options.max : ''}</span> |
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<span class="multi-select-header-placeholder">${this.placeholder}</span> |
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</div> |
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<div class="multi-select-options" style="${this.options.dropdownWidth ? 'width:' + this.options.dropdownWidth + ';' : ''}${this.options.dropdownHeight ? 'height:' + this.options.dropdownHeight + ';' : ''}"> |
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${this.options.search === true || this.options.search === 'true' ? '<input type="text" class="multi-select-search" placeholder="Search...">' : ''} |
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${selectAllHTML} |
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${optionsHTML} |
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</div> |
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</div> |
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`; |
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let element = document.createElement('div'); |
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element.innerHTML = template; |
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return element; |
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} |
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_eventHandlers() { |
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let headerElement = this.element.querySelector('.multi-select-header'); |
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this.element.querySelectorAll('.multi-select-option').forEach(option => { |
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option.onclick = () => { |
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let selected = true; |
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if (!option.classList.contains('multi-select-selected')) { |
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if (this.options.max && this.selectedValues.length >= this.options.max) { |
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return; |
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} |
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option.classList.add('multi-select-selected'); |
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if (this.options.listAll === true || this.options.listAll === 'true') { |
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if (this.element.querySelector('.multi-select-header-option')) { |
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let opt = Array.from(this.element.querySelectorAll('.multi-select-header-option')).pop(); |
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opt.insertAdjacentHTML('afterend', `<span class="multi-select-header-option" data-value="${option.dataset.value}">${option.querySelector('.multi-select-option-text').innerHTML}</span>`); |
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} else { |
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headerElement.insertAdjacentHTML('afterbegin', `<span class="multi-select-header-option" data-value="${option.dataset.value}">${option.querySelector('.multi-select-option-text').innerHTML}</span>`); |
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} |
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} |
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this.element.querySelector('.multi-select').insertAdjacentHTML('afterbegin', `<input type="hidden" name="${this.name}[]" value="${option.dataset.value}">`); |
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this.data.filter(data => data.value == option.dataset.value)[0].selected = true; |
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} else { |
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option.classList.remove('multi-select-selected'); |
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this.element.querySelectorAll('.multi-select-header-option').forEach(headerOption => headerOption.dataset.value == option.dataset.value ? headerOption.remove() : ''); |
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this.element.querySelector(`input[value="${option.dataset.value}"]`).remove(); |
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this.data.filter(data => data.value == option.dataset.value)[0].selected = false; |
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selected = false; |
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} |
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if (this.options.listAll === false || this.options.listAll === 'false') { |
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if (this.element.querySelector('.multi-select-header-option')) { |
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this.element.querySelector('.multi-select-header-option').remove(); |
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} |
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headerElement.insertAdjacentHTML('afterbegin', `<span class="multi-select-header-option">${this.selectedValues.length} selected</span>`); |
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} |
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if (!this.element.querySelector('.multi-select-header-option')) { |
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headerElement.insertAdjacentHTML('afterbegin', `<span class="multi-select-header-placeholder">${this.placeholder}</span>`); |
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} else if (this.element.querySelector('.multi-select-header-placeholder')) { |
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this.element.querySelector('.multi-select-header-placeholder').remove(); |
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} |
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if (this.options.max) { |
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this.element.querySelector('.multi-select-header-max').innerHTML = this.selectedValues.length + '/' + this.options.max; |
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} |
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if (this.options.search === true || this.options.search === 'true') { |
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this.element.querySelector('.multi-select-search').value = ''; |
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} |
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this.element.querySelectorAll('.multi-select-option').forEach(option => option.style.display = 'flex'); |
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if (this.options.closeListOnItemSelect === true || this.options.closeListOnItemSelect === 'true') { |
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headerElement.classList.remove('multi-select-header-active'); |
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} |
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this.options.onChange(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option); |
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if (selected) { |
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this.options.onSelect(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option); |
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} else { |
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this.options.onUnselect(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option); |
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} |
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}; |
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}); |
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headerElement.onclick = () => headerElement.classList.toggle('multi-select-header-active'); |
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if (this.options.search === true || this.options.search === 'true') { |
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let search = this.element.querySelector('.multi-select-search'); |
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search.oninput = () => { |
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this.element.querySelectorAll('.multi-select-option').forEach(option => { |
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option.style.display = option.querySelector('.multi-select-option-text').innerHTML.toLowerCase().indexOf(search.value.toLowerCase()) > -1 ? 'flex' : 'none'; |
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}); |
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}; |
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} |
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if (this.options.selectAll === true || this.options.selectAll === 'true') { |
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let selectAllButton = this.element.querySelector('.multi-select-all'); |
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selectAllButton.onclick = () => { |
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let allSelected = selectAllButton.classList.contains('multi-select-selected'); |
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this.element.querySelectorAll('.multi-select-option').forEach(option => { |
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let dataItem = this.data.find(data => data.value == option.dataset.value); |
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if (dataItem && ((allSelected && dataItem.selected) || (!allSelected && !dataItem.selected))) { |
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option.click(); |
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} |
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}); |
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selectAllButton.classList.toggle('multi-select-selected'); |
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}; |
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} |
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if (this.selectElement.id && document.querySelector('label[for="' + this.selectElement.id + '"]')) { |
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document.querySelector('label[for="' + this.selectElement.id + '"]').onclick = () => { |
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headerElement.classList.toggle('multi-select-header-active'); |
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}; |
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} |
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document.addEventListener('click', event => { |
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if (!event.target.closest('.' + this.name) && !event.target.closest('label[for="' + this.selectElement.id + '"]')) { |
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headerElement.classList.remove('multi-select-header-active'); |
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} |
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}); |
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} |
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_updateSelected() { |
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if (this.options.listAll === true || this.options.listAll === 'true') { |
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this.element.querySelectorAll('.multi-select-option').forEach(option => { |
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if (option.classList.contains('multi-select-selected')) { |
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this.element.querySelector('.multi-select-header').insertAdjacentHTML('afterbegin', `<span class="multi-select-header-option" data-value="${option.dataset.value}">${option.querySelector('.multi-select-option-text').innerHTML}</span>`); |
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} |
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}); |
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} else { |
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if (this.selectedValues.length > 0) { |
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this.element.querySelector('.multi-select-header').insertAdjacentHTML('afterbegin', `<span class="multi-select-header-option">${this.selectedValues.length} selected</span>`); |
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} |
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} |
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if (this.element.querySelector('.multi-select-header-option')) { |
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this.element.querySelector('.multi-select-header-placeholder').remove(); |
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} |
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} |
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get selectedValues() { |
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return this.data.filter(data => data.selected).map(data => data.value); |
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} |
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get selectedItems() { |
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return this.data.filter(data => data.selected); |
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} |
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set data(value) { |
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this.options.data = value; |
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} |
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get data() { |
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return this.options.data; |
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} |
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set selectElement(value) { |
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this.options.selectElement = value; |
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} |
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get selectElement() { |
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return this.options.selectElement; |
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} |
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set element(value) { |
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this.options.element = value; |
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} |
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get element() { |
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return this.options.element; |
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} |
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set placeholder(value) { |
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this.options.placeholder = value; |
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} |
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get placeholder() { |
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return this.options.placeholder; |
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} |
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set name(value) { |
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this.options.name = value; |
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} |
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get name() { |
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return this.options.name; |
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} |
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set width(value) { |
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this.options.width = value; |
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} |
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get width() { |
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return this.options.width; |
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} |
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set height(value) { |
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this.options.height = value; |
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} |
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get height() { |
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return this.options.height; |
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} |
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} |
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document.querySelectorAll('[data-multi-select]').forEach(select => new MultiSelect(select));
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