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dselect.js
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dselect.js
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function dselectUpdate(button, classElement, classToggler) {
const value = button.dataset.dselectValue
const target = button.closest(`.${classElement}`).previousElementSibling
const toggler = target.nextElementSibling.getElementsByClassName(classToggler)[0]
const input = target.nextElementSibling.querySelector('input')
if (target.multiple) {
Array.from(target.options).filter(option => option.value === value)[0].selected = true
} else {
target.value = value
}
if (target.multiple) {
toggler.click()
}
target.dispatchEvent(new Event('change'))
toggler.focus()
if (input) {
input.value = ''
}
}
function dselectRemoveTag(button, classElement, classToggler) {
const value = button.parentNode.dataset.dselectValue
const target = button.closest(`.${classElement}`).previousElementSibling
const toggler = target.nextElementSibling.getElementsByClassName(classToggler)[0]
const input = target.nextElementSibling.querySelector('input')
Array.from(target.options).filter(option => option.value === value)[0].selected = false
target.dispatchEvent(new Event('change'))
toggler.click()
if (input) {
input.value = ''
}
}
function dselectSearch(event, input, classElement, classToggler, creatable) {
const filterValue = input.value.toLowerCase().trim()
const itemsContainer = input.nextElementSibling
const headers = itemsContainer.querySelectorAll('.dropdown-header')
const items = itemsContainer.querySelectorAll('.dropdown-item')
const noResults = itemsContainer.nextElementSibling
headers.forEach(i => i.classList.add('d-none'))
for (const item of items) {
const filterText = item.textContent
if (filterText.toLowerCase().indexOf(filterValue) > -1) {
item.classList.remove('d-none')
let header = item
while(header = header.previousElementSibling) {
if (header.classList.contains('dropdown-header')) {
header.classList.remove('d-none')
break
}
}
} else {
item.classList.add('d-none')
}
}
const found = Array.from(items).filter(i => !i.classList.contains('d-none') && !i.hasAttribute('hidden'))
if (found.length < 1) {
noResults.classList.remove('d-none')
itemsContainer.classList.add('d-none')
if (creatable) {
noResults.innerHTML = `Press Enter to add "<strong>${input.value}</strong>"`
if (event.key === 'Enter') {
const target = input.closest(`.${classElement}`).previousElementSibling
const toggler = target.nextElementSibling.getElementsByClassName(classToggler)[0]
target.insertAdjacentHTML('afterbegin', `<option value="${input.value}" selected>${input.value}</option>`)
target.dispatchEvent(new Event('change'))
input.value = ''
input.dispatchEvent(new Event('keyup'))
toggler.click()
toggler.focus()
}
}
} else {
noResults.classList.add('d-none')
itemsContainer.classList.remove('d-none')
}
}
function dselectClear(button, classElement) {
const target = button.closest(`.${classElement}`).previousElementSibling
Array.from(target.options).forEach(option => option.selected = false)
target.dispatchEvent(new Event('change'))
}
function dselect(el, option = {}) {
el.style.display = 'none'
const classElement = 'dselect-wrapper'
const classNoResults = 'dselect-no-results'
const classTag = 'dselect-tag'
const classTagRemove = 'dselect-tag-remove'
const classPlaceholder = 'dselect-placeholder'
const classClearBtn = 'dselect-clear'
const classTogglerClearable = 'dselect-clearable'
const defaultSearch = false
const defaultCreatable = false
const defaultClearable = false
const defaultMaxHeight = '360px'
const defaultSize = ''
const search = attrBool('search') || option.search || defaultSearch
const creatable = attrBool('creatable') || option.creatable || defaultCreatable
const clearable = attrBool('clearable') || option.clearable || defaultClearable
const maxHeight = el.dataset.dselectMaxHeight || option.maxHeight || defaultMaxHeight
let size = el.dataset.dselectSize || option.size || defaultSize
size = size !== '' ? ` form-select-${size}` : ''
const classToggler = `form-select${size}`
const searchInput = search ? `<input onkeydown="return event.key !== 'Enter'" onkeyup="dselectSearch(event, this, '${classElement}', '${classToggler}', ${creatable})" type="text" class="form-control" placeholder="Search" autofocus>` : ''
function attrBool(attr) {
const attribute = `data-dselect-${attr}`
if (!el.hasAttribute(attribute)) return null
const value = el.getAttribute(attribute)
return value.toLowerCase() === 'true'
}
function removePrev() {
if (el.nextElementSibling && el.nextElementSibling.classList && el.nextElementSibling.classList.contains(classElement)) {
el.nextElementSibling.remove()
}
}
function isPlaceholder(option) {
return option.getAttribute('value') === ''
}
function selectedTag(options, multiple) {
if (multiple) {
const selectedOptions = Array.from(options).filter(option => option.selected && !isPlaceholder(option))
const placeholderOption = Array.from(options).filter(option => isPlaceholder(option))
let tag = []
if (selectedOptions.length === 0) {
const text = placeholderOption.length ? placeholderOption[0].textContent : ' '
tag.push(`<span class="${classPlaceholder}">${text}</span>`)
} else {
for (const option of selectedOptions) {
tag.push(`
<div class="${classTag}" data-dselect-value="${option.value}">
${option.text}
<svg onclick="dselectRemoveTag(this, '${classElement}', '${classToggler}')" class="${classTagRemove}" width="14" height="14" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"/><path d="M12 2C6.47 2 2 6.47 2 12s4.47 10 10 10 10-4.47 10-10S17.53 2 12 2zm5 13.59L15.59 17 12 13.41 8.41 17 7 15.59 10.59 12 7 8.41 8.41 7 12 10.59 15.59 7 17 8.41 13.41 12 17 15.59z"/></svg>
</div>
`)
}
}
return tag.join('')
} else {
const selectedOption = options[options.selectedIndex]
return isPlaceholder(selectedOption)
? `<span class="${classPlaceholder}">${selectedOption.innerHTML}</span>`
: selectedOption.innerHTML
}
}
function selectedText(options) {
const selectedOption = options[options.selectedIndex]
return isPlaceholder(selectedOption) ? '' : selectedOption.textContent
}
function itemTags(options) {
let items = []
for (const option of options) {
if (option.tagName === 'OPTGROUP') {
items.push(`<h6 class="dropdown-header">${option.getAttribute('label')}</h6>`)
} else {
const hidden = isPlaceholder(option) ? ' hidden' : ''
const active = option.selected ? ' active' : ''
const disabled = el.multiple && option.selected ? ' disabled' : ''
const value = option.value
const text = option.textContent
items.push(`<button${hidden} class="dropdown-item${active}" data-dselect-value="${value}" type="button" onclick="dselectUpdate(this, '${classElement}', '${classToggler}')"${disabled}>${text}</button>`)
}
}
items = items.join('')
return items
}
function createDom() {
const autoclose = el.multiple ? ' data-bs-auto-close="outside"' : ''
const additionalClass = Array.from(el.classList).filter(className => {
return className !== 'form-select'
&& className !== 'form-select-sm'
&& className !== 'form-select-lg'
}).join(' ')
const clearBtn = clearable && !el.multiple ? `
<button type="button" class="btn ${classClearBtn}" title="Clear selection" onclick="dselectClear(this, '${classElement}')">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 14 14" fill="none">
<path d="M13 1L0.999999 13" stroke-width="2" stroke="currentColor"></path>
<path d="M1 1L13 13" stroke-width="2" stroke="currentColor"></path>
</svg>
</button>
` : ''
const template = `
<div class="dropdown ${classElement} ${additionalClass}">
<button class="${classToggler} ${!el.multiple && clearable ? classTogglerClearable : ''}" data-dselect-text="${!el.multiple && selectedText(el.options)}" type="button" data-bs-toggle="dropdown" aria-expanded="false"${autoclose}>
${selectedTag(el.options, el.multiple)}
</button>
<div class="dropdown-menu">
<div class="d-flex flex-column">
${searchInput}
<div class="dselect-items" style="max-height:${maxHeight};overflow:auto">
${itemTags(el.querySelectorAll('*'))}
</div>
<div class="${classNoResults} d-none">No results found</div>
</div>
</div>
${clearBtn}
</div>
`
removePrev()
el.insertAdjacentHTML('afterend', template) // insert template after element
}
createDom()
function updateDom() {
const dropdown = el.nextElementSibling
const toggler = dropdown.getElementsByClassName(classToggler)[0]
const dSelectItems = dropdown.getElementsByClassName('dselect-items')[0]
toggler.innerHTML = selectedTag(el.options, el.multiple)
dSelectItems.innerHTML = itemTags(el.querySelectorAll('*'))
if (!el.multiple) {
toggler.dataset.dselectText = selectedText(el.options)
}
}
el.addEventListener('change', updateDom)
}