376 lines
17 KiB
JavaScript
376 lines
17 KiB
JavaScript
/*
|
|
* Created by David Adams
|
|
* https://codeshack.io/multi-select-dropdown-html-javascript/
|
|
*
|
|
* Released under the MIT license
|
|
*/
|
|
class MultiSelect {
|
|
|
|
constructor(element, options = {}) {
|
|
let defaults = {
|
|
searchText: 'Search...',
|
|
placeholder: 'Select item(s)',
|
|
max: null,
|
|
min: null,
|
|
disabled: false,
|
|
search: true,
|
|
selectAll: true,
|
|
listAll: true,
|
|
closeListOnItemSelect: false,
|
|
name: '',
|
|
width: '',
|
|
height: '',
|
|
dropdownWidth: '',
|
|
dropdownHeight: '',
|
|
data: [],
|
|
onChange: function() {},
|
|
onSelect: function() {},
|
|
onUnselect: function() {},
|
|
onMaxReached: function() {}
|
|
};
|
|
this.options = Object.assign(defaults, options);
|
|
this.selectElement = typeof element === 'string' ? document.querySelector(element) : element;
|
|
this.originalSelectElement = this.selectElement.cloneNode(true);
|
|
for(const prop in this.selectElement.dataset) {
|
|
if (this.options[prop] !== undefined) {
|
|
if (typeof this.options[prop] === 'boolean') {
|
|
this.options[prop] = this.selectElement.dataset[prop] === 'true';
|
|
} else {
|
|
this.options[prop] = this.selectElement.dataset[prop];
|
|
}
|
|
}
|
|
}
|
|
this.name = this.selectElement.getAttribute('name') ? this.selectElement.getAttribute('name') : 'multi-select-' + Math.floor(Math.random() * 1000000);
|
|
if (!this.options.data.length) {
|
|
let options = this.selectElement.querySelectorAll('option');
|
|
for (let i = 0; i < options.length; i++) {
|
|
this.options.data.push({
|
|
value: options[i].value,
|
|
text: options[i].innerHTML,
|
|
selected: options[i].selected,
|
|
html: options[i].getAttribute('data-html')
|
|
});
|
|
}
|
|
}
|
|
this.originalData = JSON.parse(JSON.stringify(this.options.data));
|
|
this.element = this._template();
|
|
this.selectElement.replaceWith(this.element);
|
|
this.outsideClickHandler = this._outsideClick.bind(this);
|
|
this._updateSelected();
|
|
this._eventHandlers();
|
|
if (this.options.disabled) {
|
|
this.disable();
|
|
}
|
|
}
|
|
|
|
_template() {
|
|
let optionsHTML = '';
|
|
for (let i = 0; i < this.data.length; i++) {
|
|
const isSelected = this.data[i].selected;
|
|
optionsHTML += `
|
|
<div class="multi-select-option${isSelected ? ' multi-select-selected' : ''}" data-value="${this.data[i].value}" role="option" aria-selected="${isSelected}" tabindex="-1">
|
|
<span class="multi-select-option-radio"></span>
|
|
<span class="multi-select-option-text">${this.data[i].html ? this.data[i].html : this.data[i].text}</span>
|
|
</div>
|
|
`;
|
|
}
|
|
let selectAllHTML = '';
|
|
if (this.options.selectAll) {
|
|
selectAllHTML = `<div class="multi-select-all" role="option" tabindex="-1">
|
|
<span class="multi-select-option-radio"></span>
|
|
<span class="multi-select-option-text">Select all</span>
|
|
</div>`;
|
|
}
|
|
let template = `
|
|
<div class="multi-select ${this.name}"${this.selectElement.id ? ' id="' + this.selectElement.id + '"' : ''} style="${this.width ? 'width:' + this.width + ';' : ''}${this.height ? 'height:' + this.height + ';' : ''}" role="combobox" aria-haspopup="listbox" aria-expanded="false">
|
|
${this.selectedValues.map(value => `<input type="hidden" name="${this.name}[]" value="${value}">`).join('')}
|
|
<div class="multi-select-header" style="${this.width ? 'width:' + this.width + ';' : ''}${this.height ? 'height:' + this.height + ';' : ''}" tabindex="0">
|
|
<span class="multi-select-header-max">${this.options.max ? this.selectedValues.length + '/' + this.options.max : ''}</span>
|
|
<span class="multi-select-header-placeholder">${this.placeholder}</span>
|
|
</div>
|
|
<div class="multi-select-options" style="${this.options.dropdownWidth ? 'width:' + this.options.dropdownWidth + ';' : ''}${this.options.dropdownHeight ? 'height:' + this.options.dropdownHeight + ';' : ''}" role="listbox">
|
|
${this.options.search ? '<input type="text" class="multi-select-search" placeholder="' + this.searchText + '" role="searchbox">' : ''}
|
|
${selectAllHTML}
|
|
${optionsHTML}
|
|
</div>
|
|
</div>
|
|
`;
|
|
let element = document.createElement('div');
|
|
element.innerHTML = template;
|
|
return element.firstElementChild;
|
|
}
|
|
|
|
_eventHandlers() {
|
|
let headerElement = this.element.querySelector('.multi-select-header');
|
|
const toggleDropdown = (forceClose = false) => {
|
|
if (this.element.classList.contains('disabled')) return;
|
|
if (forceClose || headerElement.classList.contains('multi-select-header-active')) {
|
|
headerElement.classList.remove('multi-select-header-active');
|
|
this.element.setAttribute('aria-expanded', 'false');
|
|
} else {
|
|
headerElement.classList.add('multi-select-header-active');
|
|
this.element.setAttribute('aria-expanded', 'true');
|
|
}
|
|
};
|
|
this.element.querySelectorAll('.multi-select-option').forEach(option => {
|
|
option.onclick = (e) => {
|
|
e.stopPropagation();
|
|
if (this.element.classList.contains('disabled')) return;
|
|
let selected = true;
|
|
if (!option.classList.contains('multi-select-selected')) {
|
|
if (this.options.max && this.selectedValues.length >= this.options.max) {
|
|
this.options.onMaxReached(this.options.max);
|
|
return;
|
|
}
|
|
option.classList.add('multi-select-selected');
|
|
option.setAttribute('aria-selected', 'true');
|
|
this.element.insertAdjacentHTML('afterbegin', `<input type="hidden" name="${this.name}[]" value="${option.dataset.value}">`);
|
|
this.data.find(data => data.value == option.dataset.value).selected = true;
|
|
} else {
|
|
option.classList.remove('multi-select-selected');
|
|
option.setAttribute('aria-selected', 'false');
|
|
this.element.querySelector(`input[value="${option.dataset.value}"]`).remove();
|
|
this.data.find(data => data.value == option.dataset.value).selected = false;
|
|
selected = false;
|
|
}
|
|
this._updateHeader();
|
|
if (this.options.search) {
|
|
this.element.querySelector('.multi-select-search').value = '';
|
|
this.element.querySelectorAll('.multi-select-option').forEach(opt => opt.style.display = 'flex');
|
|
}
|
|
if (this.options.closeListOnItemSelect) {
|
|
toggleDropdown(true);
|
|
}
|
|
this.options.onChange(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option);
|
|
if (selected) {
|
|
this.options.onSelect(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option);
|
|
} else {
|
|
this.options.onUnselect(option.dataset.value, option.querySelector('.multi-select-option-text').innerHTML, option);
|
|
}
|
|
this._validate();
|
|
};
|
|
});
|
|
headerElement.onclick = () => toggleDropdown();
|
|
if (this.options.search) {
|
|
let search = this.element.querySelector('.multi-select-search');
|
|
search.oninput = () => {
|
|
this.element.querySelectorAll('.multi-select-option').forEach(option => {
|
|
const text = option.querySelector('.multi-select-option-text').innerHTML.toLowerCase();
|
|
option.style.display = text.includes(search.value.toLowerCase()) ? 'flex' : 'none';
|
|
});
|
|
};
|
|
}
|
|
if (this.options.selectAll) {
|
|
let selectAllButton = this.element.querySelector('.multi-select-all');
|
|
selectAllButton.onclick = (e) => {
|
|
e.stopPropagation();
|
|
if (this.element.classList.contains('disabled')) return;
|
|
let allSelected = selectAllButton.classList.contains('multi-select-selected');
|
|
this.element.querySelectorAll('.multi-select-option').forEach(option => {
|
|
let dataItem = this.data.find(data => data.value == option.dataset.value);
|
|
if (dataItem && ((allSelected && dataItem.selected) || (!allSelected && !dataItem.selected))) {
|
|
option.click();
|
|
}
|
|
});
|
|
selectAllButton.classList.toggle('multi-select-selected');
|
|
};
|
|
}
|
|
if (this.selectElement.id && document.querySelector('label[for="' + this.selectElement.id + '"]')) {
|
|
document.querySelector('label[for="' + this.selectElement.id + '"]').onclick = () => {
|
|
toggleDropdown();
|
|
};
|
|
}
|
|
document.addEventListener('click', this.outsideClickHandler);
|
|
headerElement.addEventListener('keydown', (e) => {
|
|
if (['Enter', ' ', 'ArrowDown', 'ArrowUp'].includes(e.key)) {
|
|
e.preventDefault();
|
|
toggleDropdown();
|
|
const firstElement = this.element.querySelector('[role="searchbox"]') || this.element.querySelector('[role="option"]');
|
|
if (firstElement) firstElement.focus();
|
|
}
|
|
});
|
|
this.element.addEventListener('keydown', (e) => {
|
|
if (e.key === 'Escape') {
|
|
toggleDropdown(true);
|
|
headerElement.focus();
|
|
}
|
|
});
|
|
const optionsContainer = this.element.querySelector('.multi-select-options');
|
|
optionsContainer.addEventListener('keydown', (e) => {
|
|
const currentFocused = document.activeElement;
|
|
if (currentFocused.closest('.multi-select-options')) {
|
|
if (['ArrowDown', 'ArrowUp'].includes(e.key)) {
|
|
e.preventDefault();
|
|
const direction = e.key === 'ArrowDown' ? 'nextElementSibling' : 'previousElementSibling';
|
|
let nextElement = currentFocused[direction];
|
|
while (nextElement && (nextElement.style.display === 'none' || !nextElement.matches('[role="option"], [role="searchbox"]'))) {
|
|
nextElement = nextElement[direction];
|
|
}
|
|
if (nextElement) nextElement.focus();
|
|
} else if (['Enter', ' '].includes(e.key) && currentFocused.matches('[role="option"]')) {
|
|
e.preventDefault();
|
|
currentFocused.click();
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
_updateHeader() {
|
|
this.element.querySelectorAll('.multi-select-header-option, .multi-select-header-placeholder').forEach(el => el.remove());
|
|
if (this.selectedValues.length > 0) {
|
|
if (this.options.listAll) {
|
|
this.selectedItems.forEach(item => {
|
|
const el = document.createElement('span');
|
|
el.className = 'multi-select-header-option';
|
|
el.dataset.value = item.value;
|
|
el.innerHTML = item.text;
|
|
this.element.querySelector('.multi-select-header').prepend(el);
|
|
});
|
|
} else {
|
|
this.element.querySelector('.multi-select-header').insertAdjacentHTML('afterbegin', `<span class="multi-select-header-option">${this.selectedValues.length} selected</span>`);
|
|
}
|
|
} else {
|
|
this.element.querySelector('.multi-select-header').insertAdjacentHTML('beforeend', `<span class="multi-select-header-placeholder">${this.placeholder}</span>`);
|
|
}
|
|
if (this.options.max) {
|
|
this.element.querySelector('.multi-select-header-max').innerHTML = this.selectedValues.length + '/' + this.options.max;
|
|
}
|
|
}
|
|
|
|
_updateSelected() { this._updateHeader(); }
|
|
|
|
_validate() {
|
|
if (this.options.min && this.selectedValues.length < this.options.min) {
|
|
this.element.classList.add('multi-select-invalid');
|
|
} else {
|
|
this.element.classList.remove('multi-select-invalid');
|
|
}
|
|
}
|
|
|
|
_outsideClick(event) {
|
|
if (!this.element.contains(event.target) && !event.target.closest('label[for="' + this.selectElement.id + '"]')) {
|
|
let headerElement = this.element.querySelector('.multi-select-header');
|
|
if (headerElement.classList.contains('multi-select-header-active')) {
|
|
headerElement.classList.remove('multi-select-header-active');
|
|
this.element.setAttribute('aria-expanded', 'false');
|
|
}
|
|
}
|
|
}
|
|
|
|
select(value) {
|
|
const option = this.element.querySelector(`.multi-select-option[data-value="${value}"]`);
|
|
if (option && !option.classList.contains('multi-select-selected')) {
|
|
option.click();
|
|
}
|
|
}
|
|
|
|
unselect(value) {
|
|
const option = this.element.querySelector(`.multi-select-option[data-value="${value}"]`);
|
|
if (option && option.classList.contains('multi-select-selected')) {
|
|
option.click();
|
|
}
|
|
}
|
|
|
|
setValues(values) {
|
|
this.data.forEach(item => {
|
|
item.selected = values.includes(item.value);
|
|
});
|
|
this.refresh();
|
|
}
|
|
|
|
disable() {
|
|
this.element.classList.add('disabled');
|
|
this.element.querySelector('.multi-select-header').removeAttribute('tabindex');
|
|
const searchInput = this.element.querySelector('.multi-select-search');
|
|
if (searchInput) searchInput.disabled = true;
|
|
}
|
|
|
|
enable() {
|
|
this.element.classList.remove('disabled');
|
|
this.element.querySelector('.multi-select-header').setAttribute('tabindex', '0');
|
|
const searchInput = this.element.querySelector('.multi-select-search');
|
|
if (searchInput) searchInput.disabled = false;
|
|
}
|
|
|
|
destroy() {
|
|
this.element.replaceWith(this.originalSelectElement);
|
|
document.removeEventListener('click', this.outsideClickHandler);
|
|
}
|
|
|
|
refresh() {
|
|
const newElement = this._template();
|
|
this.element.replaceWith(newElement);
|
|
this.element = newElement;
|
|
this._updateSelected();
|
|
this._eventHandlers();
|
|
this._validate();
|
|
}
|
|
|
|
addItem(item) {
|
|
this.options.data.push(item);
|
|
this.refresh();
|
|
}
|
|
|
|
addItems(items) {
|
|
this.options.data.push(...items);
|
|
this.refresh();
|
|
}
|
|
|
|
async fetch(url, options = {}) {
|
|
const response = await fetch(url, options);
|
|
const data = await response.json();
|
|
this.addItems(data);
|
|
if (this.options.onload) {
|
|
this.options.onload(data, this.options);
|
|
}
|
|
}
|
|
|
|
removeItem(value) {
|
|
this.options.data = this.options.data.filter(item => item.value !== value);
|
|
this.refresh();
|
|
}
|
|
|
|
clear() {
|
|
this.options.data = [];
|
|
this.refresh();
|
|
}
|
|
|
|
reset() {
|
|
this.data = JSON.parse(JSON.stringify(this.originalData));
|
|
this.refresh();
|
|
}
|
|
|
|
selectAll() {
|
|
this.data.forEach(item => item.selected = true);
|
|
this.refresh();
|
|
}
|
|
|
|
get selectedValues() { return this.data.filter(d => d.selected).map(d => d.value); }
|
|
get selectedItems() { return this.data.filter(d => d.selected); }
|
|
get data() { return this.options.data; }
|
|
set data(value) { this.options.data = value; }
|
|
|
|
set selectElement(value) { this.options.selectElement = value; }
|
|
get selectElement() { return this.options.selectElement; }
|
|
|
|
set element(value) { this.options.element = value; }
|
|
get element() { return this.options.element; }
|
|
|
|
set searchText(value) { this.options.searchText = value; }
|
|
get searchText() { return this.options.searchText; }
|
|
|
|
set placeholder(value) { this.options.placeholder = value; }
|
|
get placeholder() { return this.options.placeholder; }
|
|
|
|
set name(value) { this.options.name = value; }
|
|
get name() { return this.options.name; }
|
|
|
|
set width(value) { this.options.width = value; }
|
|
get width() { return this.options.width; }
|
|
|
|
set height(value) { this.options.height = value; }
|
|
get height() { return this.options.height; }
|
|
|
|
}
|
|
document.querySelectorAll('[data-multi-select]').forEach(select => new MultiSelect(select));
|