@jthomae1/dselect
Version:
Dropdown select box for bootstrap 5.3
212 lines (211 loc) • 9.74 kB
JavaScript
function dselectUpdate(button, classElement, classToggler) {
const value = button.dataset.dselectValue;
const target = button.closest(`.${classElement}`).previousElementSibling;
const toggler = target.nextElementSibling.getElementsByClassName(classToggler)[0];
const input = target.nextElementSibling.querySelector("input");
const itemsContainer = button.parentNode;
const noResults = itemsContainer.nextElementSibling;
if (target.multiple) {
Array.from(target.options).filter((option) => option.value === value)[0].selected = true;
} else {
target.value = value;
}
if (target.multiple) {
toggler.click();
}
target.dispatchEvent(new Event("change"));
toggler.focus();
if (input) {
input.value = "";
noResults.classList.add("d-none");
}
}
function dselectRemoveTag(button, classElement, classToggler) {
const value = button.parentNode.dataset.dselectValue;
const target = button.closest(`.${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"));
let hasExactMatch = false;
items.forEach((item) => {
const filterText = item.textContent.toLowerCase();
if (filterText.indexOf(filterValue) > -1) {
item.classList.remove("d-none");
if (filterText === filterValue) {
hasExactMatch = true;
}
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 (creatable && !hasExactMatch && filterValue.length >= 3) {
noResults.classList.remove("d-none");
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();
itemsContainer.classList.remove("d-none");
}
} else {
noResults.classList.add("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(option2) {
return option2.getAttribute("value") === "";
}
function selectedTag(options, multiple) {
if (multiple) {
const selectedOptions = Array.from(options).filter((option2) => option2.selected && !isPlaceholder(option2));
const placeholderOption = Array.from(options).filter((option2) => isPlaceholder(option2));
let tag = [];
if (selectedOptions.length === 0) {
const text = placeholderOption.length ? placeholderOption[0].textContent : " ";
tag.push(`<span class="${classPlaceholder}">${text}</span>`);
} else {
for (const option2 of selectedOptions) {
tag.push(`
<div class="${classTag}" data-dselect-value="${option2.value}">
${option2.text}
<svg onclick="dselectRemoveTag(this, '${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 option2 of options) {
if (option2.tagName === "OPTGROUP") {
items.push(`<h6 class="dropdown-header">${option2.getAttribute("label")}</h6>`);
} else {
const hidden = isPlaceholder(option2) ? " hidden" : "";
const active = option2.selected ? " active" : "";
const disabled = el.multiple && option2.selected ? " disabled" : "";
const value = option2.value;
const text = option2.textContent;
items.push(`<button${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);
}
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);
}