bootstrap-italia
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Bootstrap Italia è un tema Bootstrap 5 per la creazione di applicazioni web nel pieno rispetto delle linee guida di design per i siti internet e i servizi digitali della PA
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JavaScript
import * as Popper from '@popperjs/core';
import { isRTL, isDisabled, noop, isElement, getElement, isVisible, getNextActiveElement } from './util/index.js';
import EventHandler from './dom/event-handler.js';
import Manipulator from './dom/manipulator.js';
import SelectorEngine from './dom/selector-engine.js';
import BaseComponent from './base-component.js';
/**
* --------------------------------------------------------------------------
* Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
* Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
* Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
* This a fork of Bootstrap: Initial license and original file name below
* Bootstrap (v5.2.3): dropdown.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
/**
* Constants
*/
const NAME = 'dropdown';
const DATA_KEY = 'bs.dropdown';
const EVENT_KEY = `.${DATA_KEY}`;
const DATA_API_KEY = '.data-api';
const ESCAPE_KEY = 'Escape';
const TAB_KEY = 'Tab';
const ARROW_UP_KEY = 'ArrowUp';
const ARROW_DOWN_KEY = 'ArrowDown';
const RIGHT_MOUSE_BUTTON = 2; // MouseEvent.button value for the secondary button, usually the right button
const EVENT_HIDE = `hide${EVENT_KEY}`;
const EVENT_HIDDEN = `hidden${EVENT_KEY}`;
const EVENT_SHOW = `show${EVENT_KEY}`;
const EVENT_SHOWN = `shown${EVENT_KEY}`;
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`;
const EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY}${DATA_API_KEY}`;
const EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY}${DATA_API_KEY}`;
const CLASS_NAME_SHOW = 'show';
const CLASS_NAME_DROPUP = 'dropup';
const CLASS_NAME_DROPEND = 'dropend';
const CLASS_NAME_DROPSTART = 'dropstart';
const CLASS_NAME_DROPUP_CENTER = 'dropup-center';
const CLASS_NAME_DROPDOWN_CENTER = 'dropdown-center';
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="dropdown"]:not(.disabled):not(:disabled)';
const SELECTOR_DATA_TOGGLE_SHOWN = `${SELECTOR_DATA_TOGGLE}.${CLASS_NAME_SHOW}`;
const SELECTOR_MENU = '.dropdown-menu';
const SELECTOR_NAVBAR = '.navbar';
const SELECTOR_NAVBAR_NAV = '.navbar-nav';
const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)';
const PLACEMENT_TOP = isRTL() ? 'top-end' : 'top-start';
const PLACEMENT_TOPEND = isRTL() ? 'top-start' : 'top-end';
const PLACEMENT_BOTTOM = isRTL() ? 'bottom-end' : 'bottom-start';
const PLACEMENT_BOTTOMEND = isRTL() ? 'bottom-start' : 'bottom-end';
const PLACEMENT_RIGHT = isRTL() ? 'left-start' : 'right-start';
const PLACEMENT_LEFT = isRTL() ? 'right-start' : 'left-start';
const PLACEMENT_TOPCENTER = 'top';
const PLACEMENT_BOTTOMCENTER = 'bottom';
const Default = {
autoClose: true,
boundary: 'clippingParents',
display: 'dynamic',
offset: [0, 2],
popperConfig: null,
reference: 'toggle',
};
const DefaultType = {
autoClose: '(boolean|string)',
boundary: '(string|element)',
display: 'string',
offset: '(array|string|function)',
popperConfig: '(null|object|function)',
reference: '(string|element|object)',
};
/**
* Class definition
*/
class Dropdown extends BaseComponent {
constructor(element, config) {
super(element, config);
this._popper = null;
this._parent = this._element.parentNode; // dropdown wrapper
// todo: v6 revert #37011 & change markup https://getbootstrap.com/docs/5.2/forms/input-group/
this._menu =
SelectorEngine.next(this._element, SELECTOR_MENU)[0] ||
SelectorEngine.prev(this._element, SELECTOR_MENU)[0] ||
SelectorEngine.findOne(SELECTOR_MENU, this._parent);
this._inNavbar = this._detectNavbar();
}
// Getters
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
static get NAME() {
return NAME
}
// Public
toggle() {
return this._isShown() ? this.hide() : this.show()
}
show() {
if (isDisabled(this._element) || this._isShown()) {
return
}
const relatedTarget = {
relatedTarget: this._element,
};
const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, relatedTarget);
if (showEvent.defaultPrevented) {
return
}
this._createPopper();
// If this is a touch-enabled device we add extra
// empty mouseover listeners to the body's immediate children;
// only needed because of broken event delegation on iOS
// https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
if ('ontouchstart' in document.documentElement && !this._parent.closest(SELECTOR_NAVBAR_NAV)) {
for (const element of [].concat(...document.body.children)) {
EventHandler.on(element, 'mouseover', noop);
}
}
this._element.focus();
this._element.setAttribute('aria-expanded', true);
this._menu.classList.add(CLASS_NAME_SHOW);
this._element.classList.add(CLASS_NAME_SHOW);
EventHandler.trigger(this._element, EVENT_SHOWN, relatedTarget);
}
hide() {
if (isDisabled(this._element) || !this._isShown()) {
return
}
const relatedTarget = {
relatedTarget: this._element,
};
this._completeHide(relatedTarget);
}
dispose() {
if (this._popper) {
this._popper.destroy();
}
super.dispose();
}
update() {
this._inNavbar = this._detectNavbar();
if (this._popper) {
this._popper.update();
}
}
// Private
_completeHide(relatedTarget) {
const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE, relatedTarget);
if (hideEvent.defaultPrevented) {
return
}
// If this is a touch-enabled device we remove the extra
// empty mouseover listeners we added for iOS support
if ('ontouchstart' in document.documentElement) {
for (const element of [].concat(...document.body.children)) {
EventHandler.off(element, 'mouseover', noop);
}
}
if (this._popper) {
this._popper.destroy();
}
this._menu.classList.remove(CLASS_NAME_SHOW);
this._element.classList.remove(CLASS_NAME_SHOW);
this._element.setAttribute('aria-expanded', 'false');
Manipulator.removeDataAttribute(this._menu, 'popper');
EventHandler.trigger(this._element, EVENT_HIDDEN, relatedTarget);
}
_getConfig(config) {
config = super._getConfig(config);
if (typeof config.reference === 'object' && !isElement(config.reference) && typeof config.reference.getBoundingClientRect !== 'function') {
// Popper virtual elements require a getBoundingClientRect method
throw new TypeError(`${NAME.toUpperCase()}: Option "reference" provided type "object" without a required "getBoundingClientRect" method.`)
}
return config
}
_createPopper() {
if (typeof Popper === 'undefined') {
throw new TypeError("Bootstrap's dropdowns require Popper (https://popper.js.org)")
}
let referenceElement = this._element;
if (this._config.reference === 'parent') {
referenceElement = this._parent;
} else if (isElement(this._config.reference)) {
referenceElement = getElement(this._config.reference);
} else if (typeof this._config.reference === 'object') {
referenceElement = this._config.reference;
}
const popperConfig = this._getPopperConfig();
this._popper = Popper.createPopper(referenceElement, this._menu, popperConfig);
}
_isShown() {
return this._menu.classList.contains(CLASS_NAME_SHOW)
}
_getPlacement() {
const parentDropdown = this._parent;
if (parentDropdown.classList.contains(CLASS_NAME_DROPEND)) {
return PLACEMENT_RIGHT
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPSTART)) {
return PLACEMENT_LEFT
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPUP_CENTER)) {
return PLACEMENT_TOPCENTER
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPDOWN_CENTER)) {
return PLACEMENT_BOTTOMCENTER
}
// We need to trim the value because custom properties can also include spaces
const isEnd = getComputedStyle(this._menu).getPropertyValue('--bs-position').trim() === 'end';
if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {
return isEnd ? PLACEMENT_TOPEND : PLACEMENT_TOP
}
return isEnd ? PLACEMENT_BOTTOMEND : PLACEMENT_BOTTOM
}
_detectNavbar() {
return this._element.closest(SELECTOR_NAVBAR) !== null
}
_getOffset() {
const { offset } = this._config;
if (typeof offset === 'string') {
return offset.split(',').map((value) => Number.parseInt(value, 10))
}
if (typeof offset === 'function') {
return (popperData) => offset(popperData, this._element)
}
return offset
}
_getPopperConfig() {
const defaultBsPopperConfig = {
placement: this._getPlacement(),
modifiers: [
{
name: 'preventOverflow',
options: {
boundary: this._config.boundary,
},
},
{
name: 'offset',
options: {
offset: this._getOffset(),
},
},
],
};
// Disable Popper if we have a static display or Dropdown is in Navbar
if (this._inNavbar || this._config.display === 'static') {
Manipulator.setDataAttribute(this._menu, 'popper', 'static'); // todo:v6 remove
defaultBsPopperConfig.modifiers = [
{
name: 'applyStyles',
enabled: false,
},
];
}
return {
...defaultBsPopperConfig,
...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig),
}
}
_selectMenuItem({ key, target }) {
const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, this._menu).filter((element) => isVisible(element));
if (!items.length) {
return
}
// if target isn't included in items (e.g. when expanding the dropdown)
// allow cycling to get the last item in case key equals ARROW_UP_KEY
getNextActiveElement(items, target, key === ARROW_DOWN_KEY, !items.includes(target)).focus();
}
static clearMenus(event) {
if (event.button === RIGHT_MOUSE_BUTTON || (event.type === 'keyup' && event.key !== TAB_KEY)) {
return
}
const openToggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE_SHOWN);
for (const toggle of openToggles) {
const context = Dropdown.getInstance(toggle);
if (!context || context._config.autoClose === false) {
continue
}
const composedPath = event.composedPath();
const isMenuTarget = composedPath.includes(context._menu);
if (
composedPath.includes(context._element) ||
(context._config.autoClose === 'inside' && !isMenuTarget) ||
(context._config.autoClose === 'outside' && isMenuTarget)
) {
continue
}
// Tab navigation through the dropdown menu or events from contained inputs shouldn't close the menu
if (
context._menu.contains(event.target) &&
((event.type === 'keyup' && event.key === TAB_KEY) || /input|select|option|textarea|form/i.test(event.target.tagName))
) {
continue
}
const relatedTarget = { relatedTarget: context._element };
if (event.type === 'click') {
relatedTarget.clickEvent = event;
}
context._completeHide(relatedTarget);
}
}
static dataApiKeydownHandler(event) {
// If not an UP | DOWN | ESCAPE key => not a dropdown command
// If input/textarea && if key is other than ESCAPE => not a dropdown command
const isInput = /input|textarea/i.test(event.target.tagName);
const isEscapeEvent = event.key === ESCAPE_KEY;
const isUpOrDownEvent = [ARROW_UP_KEY, ARROW_DOWN_KEY].includes(event.key);
if (!isUpOrDownEvent && !isEscapeEvent) {
return
}
if (isInput && !isEscapeEvent) {
return
}
event.preventDefault();
// todo: v6 revert #37011 & change markup https://getbootstrap.com/docs/5.2/forms/input-group/
const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE)
? this
: SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0] ||
SelectorEngine.next(this, SELECTOR_DATA_TOGGLE)[0] ||
SelectorEngine.findOne(SELECTOR_DATA_TOGGLE, event.delegateTarget.parentNode);
const instance = Dropdown.getOrCreateInstance(getToggleButton);
if (isUpOrDownEvent) {
event.stopPropagation();
instance.show();
instance._selectMenuItem(event);
return
}
if (instance._isShown()) {
// else is escape and we check if it is shown
event.stopPropagation();
instance.hide();
getToggleButton.focus();
}
}
}
/**
* Data API implementation
*/
if (typeof window !== 'undefined' && typeof document !== 'undefined') {
EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE, Dropdown.dataApiKeydownHandler);
EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);
EventHandler.on(document, EVENT_CLICK_DATA_API, Dropdown.clearMenus);
EventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
event.preventDefault();
Dropdown.getOrCreateInstance(this).toggle();
});
}
export { Dropdown as default };
//# sourceMappingURL=dropdown.js.map