js/dist/collapse.js

/*!
  * Bootstrap collapse.js v5.3.5 (https://getbootstrap.com/)
  * Copyright 2011-2025 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('./base-component.js'), require('./dom/event-handler.js'), require('./dom/selector-engine.js'), require('./util/index.js')) :
  typeof define === 'function' && define.amd ? define(['./base-component', './dom/event-handler', './dom/selector-engine', './util/index'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Collapse = factory(global.BaseComponent, global.EventHandler, global.SelectorEngine, global.Index));
})(this, (function (BaseComponent, EventHandler, SelectorEngine, index_js) { 'use strict';

  /**
   * --------------------------------------------------------------------------
   * Bootstrap collapse.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */


  /**
   * Constants
   */

  const NAME = 'collapse';
  const DATA_KEY = 'bs.collapse';
  const EVENT_KEY = `.${DATA_KEY}`;
  const DATA_API_KEY = '.data-api';
  const EVENT_SHOW = `show${EVENT_KEY}`;
  const EVENT_SHOWN = `shown${EVENT_KEY}`;
  const EVENT_HIDE = `hide${EVENT_KEY}`;
  const EVENT_HIDDEN = `hidden${EVENT_KEY}`;
  const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`;
  const CLASS_NAME_SHOW = 'show';
  const CLASS_NAME_COLLAPSE = 'collapse';
  const CLASS_NAME_COLLAPSING = 'collapsing';
  const CLASS_NAME_COLLAPSED = 'collapsed';
  const CLASS_NAME_DEEPER_CHILDREN = `:scope .${CLASS_NAME_COLLAPSE} .${CLASS_NAME_COLLAPSE}`;
  const CLASS_NAME_HORIZONTAL = 'collapse-horizontal';
  const WIDTH = 'width';
  const HEIGHT = 'height';
  const SELECTOR_ACTIVES = '.collapse.show, .collapse.collapsing';
  const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="collapse"]';
  const Default = {
    parent: null,
    toggle: true
  };
  const DefaultType = {
    parent: '(null|element)',
    toggle: 'boolean'
  };

  /**
   * Class definition
   */

  class Collapse extends BaseComponent {
    constructor(element, config) {
      super(element, config);
      this._isTransitioning = false;
      this._triggerArray = [];
      const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE);
      for (const elem of toggleList) {
        const selector = SelectorEngine.getSelectorFromElement(elem);
        const filterElement = SelectorEngine.find(selector).filter(foundElement => foundElement === this._element);
        if (selector !== null && filterElement.length) {
          this._triggerArray.push(elem);
        }
      }
      this._initializeChildren();
      if (!this._config.parent) {
        this._addAriaAndCollapsedClass(this._triggerArray, this._isShown());
      }
      if (this._config.toggle) {
        this.toggle();
      }
    }

    // Getters
    static get Default() {
      return Default;
    }
    static get DefaultType() {
      return DefaultType;
    }
    static get NAME() {
      return NAME;
    }

    // Public
    toggle() {
      if (this._isShown()) {
        this.hide();
      } else {
        this.show();
      }
    }
    show() {
      if (this._isTransitioning || this._isShown()) {
        return;
      }
      let activeChildren = [];

      // find active children
      if (this._config.parent) {
        activeChildren = this._getFirstLevelChildren(SELECTOR_ACTIVES).filter(element => element !== this._element).map(element => Collapse.getOrCreateInstance(element, {
          toggle: false
        }));
      }
      if (activeChildren.length && activeChildren[0]._isTransitioning) {
        return;
      }
      const startEvent = EventHandler.trigger(this._element, EVENT_SHOW);
      if (startEvent.defaultPrevented) {
        return;
      }
      for (const activeInstance of activeChildren) {
        activeInstance.hide();
      }
      const dimension = this._getDimension();
      this._element.classList.remove(CLASS_NAME_COLLAPSE);
      this._element.classList.add(CLASS_NAME_COLLAPSING);
      this._element.style[dimension] = 0;
      this._addAriaAndCollapsedClass(this._triggerArray, true);
      this._isTransitioning = true;
      const complete = () => {
        this._isTransitioning = false;
        this._element.classList.remove(CLASS_NAME_COLLAPSING);
        this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW);
        this._element.style[dimension] = '';
        EventHandler.trigger(this._element, EVENT_SHOWN);
      };
      const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1);
      const scrollSize = `scroll${capitalizedDimension}`;
      this._queueCallback(complete, this._element, true);
      this._element.style[dimension] = `${this._element[scrollSize]}px`;
    }
    hide() {
      if (this._isTransitioning || !this._isShown()) {
        return;
      }
      const startEvent = EventHandler.trigger(this._element, EVENT_HIDE);
      if (startEvent.defaultPrevented) {
        return;
      }
      const dimension = this._getDimension();
      this._element.style[dimension] = `${this._element.getBoundingClientRect()[dimension]}px`;
      index_js.reflow(this._element);
      this._element.classList.add(CLASS_NAME_COLLAPSING);
      this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW);
      for (const trigger of this._triggerArray) {
        const element = SelectorEngine.getElementFromSelector(trigger);
        if (element && !this._isShown(element)) {
          this._addAriaAndCollapsedClass([trigger], false);
        }
      }
      this._isTransitioning = true;
      const complete = () => {
        this._isTransitioning = false;
        this._element.classList.remove(CLASS_NAME_COLLAPSING);
        this._element.classList.add(CLASS_NAME_COLLAPSE);
        EventHandler.trigger(this._element, EVENT_HIDDEN);
      };
      this._element.style[dimension] = '';
      this._queueCallback(complete, this._element, true);
    }
    _isShown(element = this._element) {
      return element.classList.contains(CLASS_NAME_SHOW);
    }

    // Private
    _configAfterMerge(config) {
      config.toggle = Boolean(config.toggle); // Coerce string values
      config.parent = index_js.getElement(config.parent);
      return config;
    }
    _getDimension() {
      return this._element.classList.contains(CLASS_NAME_HORIZONTAL) ? WIDTH : HEIGHT;
    }
    _initializeChildren() {
      if (!this._config.parent) {
        return;
      }
      const children = this._getFirstLevelChildren(SELECTOR_DATA_TOGGLE);
      for (const element of children) {
        const selected = SelectorEngine.getElementFromSelector(element);
        if (selected) {
          this._addAriaAndCollapsedClass([element], this._isShown(selected));
        }
      }
    }
    _getFirstLevelChildren(selector) {
      const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent);
      // remove children if greater depth
      return SelectorEngine.find(selector, this._config.parent).filter(element => !children.includes(element));
    }
    _addAriaAndCollapsedClass(triggerArray, isOpen) {
      if (!triggerArray.length) {
        return;
      }
      for (const element of triggerArray) {
        element.classList.toggle(CLASS_NAME_COLLAPSED, !isOpen);
        element.setAttribute('aria-expanded', isOpen);
      }
    }

    // Static
    static jQueryInterface(config) {
      const _config = {};
      if (typeof config === 'string' && /show|hide/.test(config)) {
        _config.toggle = false;
      }
      return this.each(function () {
        const data = Collapse.getOrCreateInstance(this, _config);
        if (typeof config === 'string') {
          if (typeof data[config] === 'undefined') {
            throw new TypeError(`No method named "${config}"`);
          }
          data[config]();
        }
      });
    }
  }

  /**
   * Data API implementation
   */

  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
    // preventDefault only for <a> elements (which change the URL) not inside the collapsible element
    if (event.target.tagName === 'A' || event.delegateTarget && event.delegateTarget.tagName === 'A') {
      event.preventDefault();
    }
    for (const element of SelectorEngine.getMultipleElementsFromSelector(this)) {
      Collapse.getOrCreateInstance(element, {
        toggle: false
      }).toggle();
    }
  });

  /**
   * jQuery
   */

  index_js.defineJQueryPlugin(Collapse);

  return Collapse;

}));
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