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multi-selects
This commit is contained in:
Simon Martens
517
views/transform/multi-select-simple.js
Normal file
517
views/transform/multi-select-simple.js
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@@ -0,0 +1,517 @@
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// --- Class Name Constants for MultiSelectSimple ---
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const MSS_COMPONENT_WRAPPER_CLASS = "mss-component-wrapper";
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const MSS_SELECTED_ITEMS_CONTAINER_CLASS = "mss-selected-items-container";
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const MSS_SELECTED_ITEM_PILL_CLASS = "mss-selected-item-pill";
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const MSS_SELECTED_ITEM_TEXT_CLASS = "mss-selected-item-text";
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const MSS_SELECTED_ITEM_DELETE_BTN_CLASS = "mss-selected-item-delete-btn";
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const MSS_INPUT_CONTROLS_CONTAINER_CLASS = "mss-input-controls-container"; // New container for input and create button
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const MSS_INPUT_WRAPPER_CLASS = "mss-input-wrapper";
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const MSS_TEXT_INPUT_CLASS = "mss-text-input";
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const MSS_CREATE_NEW_BUTTON_CLASS = "mss-create-new-button";
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const MSS_OPTIONS_LIST_CLASS = "mss-options-list";
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const MSS_OPTION_ITEM_CLASS = "mss-option-item";
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const MSS_OPTION_ITEM_NAME_CLASS = "mss-option-item-name";
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const MSS_OPTION_ITEM_DETAIL_CLASS = "mss-option-item-detail";
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const MSS_HIGHLIGHTED_OPTION_CLASS = "mss-option-item-highlighted";
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const MSS_HIDDEN_SELECT_CLASS = "mss-hidden-select";
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// State classes for MultiSelectSimple
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const MSS_STATE_NO_SELECTION = "mss-state-no-selection";
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const MSS_STATE_HAS_SELECTION = "mss-state-has-selection";
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const MSS_STATE_LIST_OPEN = "mss-state-list-open";
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// --- MultiSelectSimple Element ---
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export class MultiSelectSimple extends HTMLElement {
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static formAssociated = true;
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constructor() {
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super();
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this.internals_ = this.attachInternals();
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this._value = []; // Array of selected item IDs
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this._options = [
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// Default options
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{ id: "opt1", name: "Option Alpha", additional_data: "Info A" },
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{ id: "opt2", name: "Option Beta", additional_data: "Info B" },
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{ id: "opt3", name: "Option Gamma", additional_data: "Info C" },
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{ id: "opt4", name: "Option Delta", additional_data: "Info D" },
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];
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this._filteredOptions = [];
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this._highlightedIndex = -1;
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this._isOptionsListVisible = false;
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this._setupTemplates();
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this._bindEventHandlers();
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}
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_setupTemplates() {
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this.optionTemplate = document.createElement("template");
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this.optionTemplate.innerHTML = `
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<li role="option" class="${MSS_OPTION_ITEM_CLASS} px-3 py-2 text-sm cursor-pointer transition-colors duration-75 group">
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<span data-ref="nameEl" class="${MSS_OPTION_ITEM_NAME_CLASS} font-semibold"></span>
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<span data-ref="detailEl" class="${MSS_OPTION_ITEM_DETAIL_CLASS} text-xs ml-2"></span>
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</li>
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`;
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this.selectedItemTemplate = document.createElement("template");
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this.selectedItemTemplate.innerHTML = `
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<span class="${MSS_SELECTED_ITEM_PILL_CLASS} flex items-center">
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<span data-ref="textEl" class="${MSS_SELECTED_ITEM_TEXT_CLASS}"></span>
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<button type="button" data-ref="deleteBtn" class="${MSS_SELECTED_ITEM_DELETE_BTN_CLASS} ml-1.5 text-xs">×</button>
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</span>
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`;
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}
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_bindEventHandlers() {
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this._handleInput = this._handleInput.bind(this);
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this._handleKeyDown = this._handleKeyDown.bind(this);
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this._handleFocus = this._handleFocus.bind(this);
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this._handleBlur = this._handleBlur.bind(this);
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this._handleOptionMouseDown = this._handleOptionMouseDown.bind(this);
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this._handleOptionClick = this._handleOptionClick.bind(this);
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this._handleCreateNewButtonClick = this._handleCreateNewButtonClick.bind(this);
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}
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_getItemById(id) {
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return this._options.find((opt) => opt.id === id);
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}
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// --- Public Methods ---
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setOptions(newOptions) {
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if (
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Array.isArray(newOptions) &&
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newOptions.every((o) => o && typeof o.id === "string" && typeof o.name === "string")
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) {
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this._options = [...newOptions];
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const validValues = this._value.filter((id) => this._getItemById(id));
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if (validValues.length !== this._value.length) {
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this.value = validValues;
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}
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this._filteredOptions = [];
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this._highlightedIndex = -1;
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if (this.inputElement && this.inputElement.value) {
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this._handleInput({ target: this.inputElement });
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} else {
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this._hideOptionsList();
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}
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} else {
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console.error("setOptions expects an array of objects with id and name properties.");
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}
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}
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get value() {
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return this._value;
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}
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set value(newVal) {
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if (Array.isArray(newVal)) {
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this._value = [
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...new Set(newVal.filter((id) => typeof id === "string" && this._getItemById(id))),
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];
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} else {
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this._value = [];
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}
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this._updateFormValue();
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if (this.selectedItemsContainer) this._renderSelectedItems();
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this._updateRootElementStateClasses();
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}
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get name() {
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return this.getAttribute("name");
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}
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set name(value) {
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this.setAttribute("name", value);
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if (this.hiddenSelect) this.hiddenSelect.name = value;
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}
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connectedCallback() {
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this._render();
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this.inputControlsContainer = this.querySelector(`.${MSS_INPUT_CONTROLS_CONTAINER_CLASS}`);
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this.inputWrapper = this.querySelector(`.${MSS_INPUT_WRAPPER_CLASS}`);
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this.inputElement = this.querySelector(`.${MSS_TEXT_INPUT_CLASS}`);
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this.createNewButton = this.querySelector(`.${MSS_CREATE_NEW_BUTTON_CLASS}`);
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this.optionsListElement = this.querySelector(`.${MSS_OPTIONS_LIST_CLASS}`);
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this.selectedItemsContainer = this.querySelector(`.${MSS_SELECTED_ITEMS_CONTAINER_CLASS}`);
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this.hiddenSelect = this.querySelector(`.${MSS_HIDDEN_SELECT_CLASS}`);
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if (this.name && this.hiddenSelect) this.hiddenSelect.name = this.name;
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this.inputElement.addEventListener("input", this._handleInput);
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this.inputElement.addEventListener("keydown", this._handleKeyDown);
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this.inputElement.addEventListener("focus", this._handleFocus);
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this.inputElement.addEventListener("blur", this._handleBlur);
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this.optionsListElement.addEventListener("mousedown", this._handleOptionMouseDown);
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this.optionsListElement.addEventListener("click", this._handleOptionClick);
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this.createNewButton.addEventListener("click", this._handleCreateNewButtonClick);
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this._updateRootElementStateClasses();
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// Create button is always visible now, visibility logic removed from _handleInput
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// this.createNewButton.classList.add('hidden'); // No longer initially hidden by default in JS
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if (this.hasAttribute("value")) {
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try {
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this.value = JSON.parse(this.getAttribute("value"));
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} catch (e) {
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this.value = this.getAttribute("value")
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.split(",")
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.map((s) => s.trim())
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.filter(Boolean);
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}
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} else {
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this._renderSelectedItems();
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this._synchronizeHiddenSelect();
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}
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if (this.hasAttribute("disabled")) this.disabledCallback(true);
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}
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disconnectedCallback() {
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if (this.inputElement) {
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this.inputElement.removeEventListener("input", this._handleInput);
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this.inputElement.removeEventListener("keydown", this._handleKeyDown);
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this.inputElement.removeEventListener("focus", this._handleFocus);
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this.inputElement.removeEventListener("blur", this._handleBlur);
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}
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if (this.optionsListElement) {
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this.optionsListElement.removeEventListener("mousedown", this._handleOptionMouseDown);
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this.optionsListElement.removeEventListener("click", this._handleOptionClick);
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}
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if (this.createNewButton) {
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this.createNewButton.removeEventListener("click", this._handleCreateNewButtonClick);
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}
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clearTimeout(this._blurTimeout);
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}
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formAssociatedCallback(form) {}
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formDisabledCallback(disabled) {
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this.disabledCallback(disabled);
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}
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formResetCallback() {
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this.value = [];
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this._hideOptionsList();
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if (this.inputElement) this.inputElement.value = "";
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// Create button visibility is not tied to reset, it's always shown
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this._updateRootElementStateClasses();
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}
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formStateRestoreCallback(state, mode) {
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this.value = Array.isArray(state) ? state : [];
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this._updateRootElementStateClasses();
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}
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_synchronizeHiddenSelect() {
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if (!this.hiddenSelect) return;
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this.hiddenSelect.innerHTML = "";
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this._value.forEach((id) => {
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const option = document.createElement("option");
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option.value = id;
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option.textContent = id;
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option.selected = true;
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this.hiddenSelect.appendChild(option);
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});
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}
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_updateFormValue() {
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this.internals_.setFormValue(null);
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this._synchronizeHiddenSelect();
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}
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disabledCallback(disabled) {
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if (this.inputElement) this.inputElement.disabled = disabled;
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if (this.createNewButton) this.createNewButton.disabled = disabled;
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this.classList.toggle("opacity-50", disabled);
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this.classList.toggle("cursor-not-allowed", disabled);
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if (this.selectedItemsContainer)
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this.selectedItemsContainer.classList.toggle("pointer-events-none", disabled);
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this.querySelectorAll(`.${MSS_SELECTED_ITEM_DELETE_BTN_CLASS}`).forEach(
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(btn) => (btn.disabled = disabled),
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);
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if (this.hiddenSelect) this.hiddenSelect.disabled = disabled;
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}
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_updateRootElementStateClasses() {
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this.classList.toggle(MSS_STATE_NO_SELECTION, this._value.length === 0);
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this.classList.toggle(MSS_STATE_HAS_SELECTION, this._value.length > 0);
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this.classList.toggle(MSS_STATE_LIST_OPEN, this._isOptionsListVisible);
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}
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_render() {
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const componentId = this.id || `mss-${crypto.randomUUID().slice(0, 8)}`;
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if (!this.id) this.setAttribute("id", componentId);
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this.innerHTML = `
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<style> .${MSS_HIDDEN_SELECT_CLASS} { display: none !important; visibility: hidden !important; position: absolute !important; width: 0 !important; height: 0 !important; opacity: 0 !important; pointer-events: none !important; } </style>
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<div class="${MSS_COMPONENT_WRAPPER_CLASS} relative">
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<div class="${MSS_SELECTED_ITEMS_CONTAINER_CLASS} flex flex-wrap gap-1 mb-1 min-h-[38px]" aria-live="polite"></div>
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<div class="${MSS_INPUT_CONTROLS_CONTAINER_CLASS} flex items-center space-x-2">
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<div class="${MSS_INPUT_WRAPPER_CLASS} relative rounded-md flex items-center flex-grow">
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<input type="text" class="${MSS_TEXT_INPUT_CLASS} w-full outline-none bg-transparent p-1.5 text-sm" placeholder="Search items..."/>
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</div>
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<button type="button" class="${MSS_CREATE_NEW_BUTTON_CLASS} px-2 py-1 text-xs rounded-sm"> +
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</button>
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</div>
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<ul role="listbox" class="${MSS_OPTIONS_LIST_CLASS} absolute z-20 w-full max-h-60 overflow-y-auto mt-1 hidden"></ul>
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<select multiple name="${this.getAttribute("name") || "simple_items_default"}" id="hidden-select-${componentId}" class="${MSS_HIDDEN_SELECT_CLASS}" aria-hidden="true"></select>
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</div>
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`;
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}
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_createSelectedItemElement(itemId) {
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const itemData = this._getItemById(itemId);
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if (!itemData) return null;
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const fragment = this.selectedItemTemplate.content.cloneNode(true);
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const pillEl = fragment.firstElementChild;
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const textEl = pillEl.querySelector('[data-ref="textEl"]');
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textEl.textContent = itemData.name;
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if (itemData.additional_data) {
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const detailSpan = document.createElement("span");
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detailSpan.className = "ml-1 opacity-75 text-xs";
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detailSpan.textContent = `(${itemData.additional_data})`;
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textEl.appendChild(detailSpan);
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}
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const deleteBtn = pillEl.querySelector('[data-ref="deleteBtn"]');
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deleteBtn.setAttribute("aria-label", `Remove ${itemData.name}`);
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deleteBtn.dataset.id = itemId;
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deleteBtn.disabled = this.hasAttribute("disabled");
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deleteBtn.addEventListener("click", (e) => {
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e.stopPropagation();
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this._handleDeleteSelectedItem(itemId);
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});
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return pillEl;
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}
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_renderSelectedItems() {
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if (!this.selectedItemsContainer) return;
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this.selectedItemsContainer.innerHTML = "";
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this._value.forEach((id) => {
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const pillEl = this._createSelectedItemElement(id);
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if (pillEl) this.selectedItemsContainer.appendChild(pillEl);
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});
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if (this._value.length === 0) {
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this.selectedItemsContainer.innerHTML = `<span class="italic text-xs">No items selected</span>`;
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}
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this._updateRootElementStateClasses();
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}
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_createOptionElement(itemData, index) {
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const fragment = this.optionTemplate.content.cloneNode(true);
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const li = fragment.firstElementChild;
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const nameEl = li.querySelector('[data-ref="nameEl"]');
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const detailEl = li.querySelector('[data-ref="detailEl"]');
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nameEl.textContent = itemData.name;
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detailEl.textContent = itemData.additional_data ? `(${itemData.additional_data})` : "";
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li.dataset.id = itemData.id;
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li.setAttribute("aria-selected", String(index === this._highlightedIndex));
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if (index === this._highlightedIndex) {
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li.classList.add(MSS_HIGHLIGHTED_OPTION_CLASS);
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li.id = `highlighted-option-${this.id || "multi-select-simple"}`;
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}
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return li;
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}
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_renderOptionsList() {
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if (!this.optionsListElement) return;
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this.optionsListElement.innerHTML = "";
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if (this._filteredOptions.length === 0 || !this._isOptionsListVisible) {
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this.optionsListElement.classList.add("hidden");
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} else {
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this.optionsListElement.classList.remove("hidden");
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this._filteredOptions.forEach((item, index) => {
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const optionEl = this._createOptionElement(item, index);
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this.optionsListElement.appendChild(optionEl);
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});
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const highlightedElement = this.optionsListElement.querySelector(
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`#highlighted-option-${this.id || "multi-select-simple"}`,
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);
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if (highlightedElement) highlightedElement.scrollIntoView({ block: "nearest" });
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}
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this._updateRootElementStateClasses();
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}
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_handleCreateNewButtonClick() {
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const inputValue = this.inputElement ? this.inputElement.value.trim() : "";
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console.log(`"Create New" button clicked. Current input value: "${inputValue}"`);
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// User will implement the actual creation logic here.
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}
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_handleInput(event) {
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const searchTerm = event.target.value;
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// "Create New" button is always visible, no need to toggle based on input here.
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if (searchTerm.length === 0) {
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this._filteredOptions = [];
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this._isOptionsListVisible = false;
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} else {
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const searchTermLower = searchTerm.toLowerCase();
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this._filteredOptions = this._options.filter((item) => {
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if (this._value.includes(item.id)) return false;
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return (
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item.name.toLowerCase().includes(searchTermLower) ||
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(item.additional_data && item.additional_data.toLowerCase().includes(searchTermLower))
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);
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});
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this._isOptionsListVisible = this._filteredOptions.length > 0;
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}
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this._highlightedIndex = this._filteredOptions.length > 0 ? 0 : -1;
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this._renderOptionsList();
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}
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_handleKeyDown(event) {
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if (this.inputElement.disabled) return;
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if (event.key === "Backspace") {
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return;
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}
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if (!this._isOptionsListVisible || this._filteredOptions.length === 0) {
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if (event.key === "Escape") this._hideOptionsList();
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return;
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}
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switch (event.key) {
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case "ArrowDown":
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event.preventDefault();
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this._highlightedIndex = (this._highlightedIndex + 1) % this._filteredOptions.length;
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this._renderOptionsList();
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break;
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case "ArrowUp":
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event.preventDefault();
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this._highlightedIndex =
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(this._highlightedIndex - 1 + this._filteredOptions.length) %
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this._filteredOptions.length;
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this._renderOptionsList();
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break;
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case "Enter":
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event.preventDefault();
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if (this._highlightedIndex > -1 && this._filteredOptions[this._highlightedIndex]) {
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this._selectItem(this._filteredOptions[this._highlightedIndex].id);
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}
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break;
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case "Escape":
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event.preventDefault();
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this._hideOptionsList();
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break;
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case "Tab":
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this._hideOptionsList();
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break;
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}
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}
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_hideOptionsList() {
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this._isOptionsListVisible = false;
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this._highlightedIndex = -1;
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if (this.optionsListElement) this._renderOptionsList();
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}
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_handleFocus() {
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if (this.inputElement.disabled) return;
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if (this.inputWrapper)
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this.inputWrapper.classList.add(
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"border",
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"border-gray-300",
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||||
"focus-within:border-blue-500",
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||||
"focus-within:ring-1",
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"focus-within:ring-blue-500",
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);
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||||
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if (this.inputElement.value.length > 0) {
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this._handleInput({ target: this.inputElement });
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} else {
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this._hideOptionsList();
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||||
}
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||||
this._updateRootElementStateClasses();
|
||||
}
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_blurTimeout = null;
|
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_handleBlur() {
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if (this.inputWrapper)
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this.inputWrapper.classList.remove(
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||||
"border",
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||||
"border-gray-300",
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||||
"focus-within:border-blue-500",
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||||
"focus-within:ring-1",
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||||
"focus-within:ring-blue-500",
|
||||
);
|
||||
|
||||
this._blurTimeout = setTimeout(() => {
|
||||
if (
|
||||
!this.contains(document.activeElement) ||
|
||||
document.activeElement === this.createNewButton
|
||||
) {
|
||||
if (
|
||||
document.activeElement !== this.createNewButton &&
|
||||
!(this.optionsListElement && this.optionsListElement.contains(document.activeElement))
|
||||
) {
|
||||
this._hideOptionsList();
|
||||
}
|
||||
}
|
||||
}, 150);
|
||||
}
|
||||
|
||||
_handleOptionMouseDown(event) {
|
||||
event.preventDefault();
|
||||
}
|
||||
|
||||
_handleOptionClick(event) {
|
||||
const li = event.target.closest("li[data-id]");
|
||||
if (li) {
|
||||
const itemId = li.dataset.id;
|
||||
this._selectItem(itemId);
|
||||
}
|
||||
}
|
||||
|
||||
_selectItem(itemId) {
|
||||
if (itemId && !this._value.includes(itemId)) {
|
||||
this._value.push(itemId);
|
||||
this._updateFormValue();
|
||||
this._renderSelectedItems();
|
||||
}
|
||||
if (this.inputElement) this.inputElement.value = "";
|
||||
this._filteredOptions = [];
|
||||
this._hideOptionsList();
|
||||
// Create button remains visible
|
||||
if (this.inputElement) this.inputElement.focus();
|
||||
}
|
||||
|
||||
_handleDeleteSelectedItem(itemId) {
|
||||
this._value = this._value.filter((id) => id !== itemId);
|
||||
this._updateFormValue();
|
||||
this._renderSelectedItems();
|
||||
if (this.inputElement) {
|
||||
this.inputElement.focus();
|
||||
this._handleInput({ target: this.inputElement });
|
||||
}
|
||||
}
|
||||
}
|
||||
customElements.define("multi-select-simple", MultiSelectSimple);
|
||||
|
||||
// --- Demo Page Script for MultiSelectSimple ---
|
||||
const myFormSimple = document.getElementById("myFormSimple");
|
||||
const formDataDisplaySimple = document.getElementById("form-data-display-simple");
|
||||
const formDataPreSimple = formDataDisplaySimple.querySelector("pre");
|
||||
|
||||
myFormSimple.addEventListener("submit", function (event) {
|
||||
event.preventDefault();
|
||||
const formData = new FormData(this);
|
||||
let output = "";
|
||||
console.log("Simple Form Submitted. FormData entries:");
|
||||
for (let [name, value] of formData.entries()) {
|
||||
console.log(`FormData - ${name}: ${value}`);
|
||||
output += `FormData - ${name}: ${value}\n`;
|
||||
}
|
||||
const simpleItemSelectEl = document.getElementById("simple-item-select");
|
||||
output += `\nCustom element .value (IDs): [${simpleItemSelectEl.value.join(", ")}]`;
|
||||
|
||||
formDataPreSimple.textContent = output;
|
||||
formDataDisplaySimple.classList.remove("hidden");
|
||||
});
|
||||
|
||||
myFormSimple.addEventListener("reset", function (event) {
|
||||
console.log("Simple Form reset!");
|
||||
formDataPreSimple.textContent = "";
|
||||
formDataDisplaySimple.classList.add("hidden");
|
||||
setTimeout(() => {
|
||||
const el = document.getElementById("simple-item-select");
|
||||
if (el) {
|
||||
console.log(`simple-item-select .value after reset:`, el.value);
|
||||
if (el.hiddenSelect) {
|
||||
const hiddenOptions = Array.from(el.hiddenSelect.options).map((opt) => opt.value);
|
||||
console.log(`simple-item-select hidden select values:`, hiddenOptions);
|
||||
}
|
||||
}
|
||||
}, 0);
|
||||
});
|
||||
Reference in New Issue
Block a user