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 { isDisabled, getElementFromSelector, getNextActiveElement } from './util/index.js';
import EventHandler from './dom/event-handler.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): tab.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
/**
* Constants
*/
const NAME = 'tab';
const DATA_KEY = 'bs.tab';
const EVENT_KEY = `.${DATA_KEY}`;
const EVENT_HIDE = `hide${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}`;
const EVENT_KEYDOWN = `keydown${EVENT_KEY}`;
const EVENT_LOAD_DATA_API = `load${EVENT_KEY}`;
const ARROW_LEFT_KEY = 'ArrowLeft';
const ARROW_RIGHT_KEY = 'ArrowRight';
const ARROW_UP_KEY = 'ArrowUp';
const ARROW_DOWN_KEY = 'ArrowDown';
const ENTER_KEY = 'Enter';
const SPACE_BAR_KEY = ' ';
const CLASS_NAME_ACTIVE = 'active';
const CLASS_NAME_FADE = 'fade';
const CLASS_NAME_SHOW = 'show';
const CLASS_DROPDOWN = 'dropdown';
const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';
const SELECTOR_DROPDOWN_MENU = '.dropdown-menu';
const NOT_SELECTOR_DROPDOWN_TOGGLE = ':not(.dropdown-toggle)';
const SELECTOR_TAB_PANEL = '.list-group, .nav, [role="tablist"]';
const SELECTOR_OUTER = '.nav-item, .list-group-item';
const SELECTOR_INNER = `.nav-link${NOT_SELECTOR_DROPDOWN_TOGGLE}, .list-group-item${NOT_SELECTOR_DROPDOWN_TOGGLE}, [role="tab"]${NOT_SELECTOR_DROPDOWN_TOGGLE}`;
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="tab"], [data-bs-toggle="pill"], [data-bs-toggle="list"]'; // todo:v6: could be only `tab`
const SELECTOR_INNER_ELEM = `${SELECTOR_INNER}, ${SELECTOR_DATA_TOGGLE}`;
/**
* Class definition
*/
class Tab extends BaseComponent {
constructor(element) {
super(element);
this._parent = this._element.closest(SELECTOR_TAB_PANEL);
if (!this._parent) {
return
// todo: should Throw exception on v6
// throw new TypeError(`${element.outerHTML} has not a valid parent ${SELECTOR_INNER_ELEM}`)
}
// Set up initial aria attributes
this._setInitialAttributes(this._parent, this._getChildren());
EventHandler.on(this._element, EVENT_KEYDOWN, (event) => this._keydown(event));
}
// Getters
static get NAME() {
return NAME
}
// Public
show() {
// Shows this elem and deactivate the active sibling if exists
const innerElem = this._element;
if (this._elemIsActive(innerElem)) {
return
}
// Search for active tab on same parent to deactivate it
const active = this._getActiveElem();
const hideEvent = active ? EventHandler.trigger(active, EVENT_HIDE, { relatedTarget: innerElem }) : null;
const showEvent = EventHandler.trigger(innerElem, EVENT_SHOW, { relatedTarget: active });
if (showEvent.defaultPrevented || (hideEvent && hideEvent.defaultPrevented)) {
return
}
this._deactivate(active, innerElem);
this._activate(innerElem, active);
}
// Private
_activate(element, relatedElem) {
if (!element) {
return
}
element.classList.add(CLASS_NAME_ACTIVE);
this._activate(getElementFromSelector(element)); // Search and activate/show the proper section
const complete = () => {
if (element.getAttribute('role') !== 'tab') {
element.classList.add(CLASS_NAME_SHOW);
return
}
element.removeAttribute('tabindex');
element.setAttribute('aria-selected', true);
this._toggleDropDown(element, true);
EventHandler.trigger(element, EVENT_SHOWN, {
relatedTarget: relatedElem,
});
};
this._queueCallback(complete, element, element.classList.contains(CLASS_NAME_FADE));
}
_deactivate(element, relatedElem) {
if (!element) {
return
}
element.classList.remove(CLASS_NAME_ACTIVE);
element.blur();
this._deactivate(getElementFromSelector(element)); // Search and deactivate the shown section too
const complete = () => {
if (element.getAttribute('role') !== 'tab') {
element.classList.remove(CLASS_NAME_SHOW);
return
}
element.setAttribute('aria-selected', false);
element.setAttribute('tabindex', '-1');
this._toggleDropDown(element, false);
EventHandler.trigger(element, EVENT_HIDDEN, { relatedTarget: relatedElem });
};
this._queueCallback(complete, element, element.classList.contains(CLASS_NAME_FADE));
}
_keydown(event) {
if (![ARROW_LEFT_KEY, ARROW_RIGHT_KEY, ARROW_UP_KEY, ARROW_DOWN_KEY, ENTER_KEY, SPACE_BAR_KEY].includes(event.key)) {
return
}
event.stopPropagation(); // stopPropagation/preventDefault both added to support up/down keys without scrolling the page
event.preventDefault();
if (event.key === ENTER_KEY || event.key === SPACE_BAR_KEY) {
Tab.getOrCreateInstance(event.target).show();
return
}
const isNext = [ARROW_RIGHT_KEY, ARROW_DOWN_KEY].includes(event.key);
const nextActiveElement = getNextActiveElement(
this._getChildren().filter((element) => !isDisabled(element)),
event.target,
isNext,
true
);
if (nextActiveElement) {
nextActiveElement.focus({ preventScroll: true });
}
}
_getChildren() {
// collection of inner elements
return SelectorEngine.find(SELECTOR_INNER_ELEM, this._parent)
}
_getActiveElem() {
return this._getChildren().find((child) => this._elemIsActive(child)) || null
}
_setInitialAttributes(parent, children) {
this._setAttributeIfNotExists(parent, 'role', 'tablist');
for (const child of children) {
this._setInitialAttributesOnChild(child);
}
}
_setInitialAttributesOnChild(child) {
child = this._getInnerElement(child);
const isActive = this._elemIsActive(child);
const outerElem = this._getOuterElement(child);
child.setAttribute('aria-selected', isActive);
if (outerElem !== child) {
this._setAttributeIfNotExists(outerElem, 'role', 'presentation');
}
if (!isActive) {
child.setAttribute('tabindex', '-1');
}
this._setAttributeIfNotExists(child, 'role', 'tab');
// set attributes to the related panel too
this._setInitialAttributesOnTargetPanel(child);
}
_setInitialAttributesOnTargetPanel(child) {
const target = getElementFromSelector(child);
if (!target) {
return
}
this._setAttributeIfNotExists(target, 'role', 'tabpanel');
if (child.id) {
this._setAttributeIfNotExists(target, 'aria-labelledby', `#${child.id}`);
}
}
_toggleDropDown(element, open) {
const outerElem = this._getOuterElement(element);
if (!outerElem.classList.contains(CLASS_DROPDOWN)) {
return
}
const toggle = (selector, className) => {
const element = SelectorEngine.findOne(selector, outerElem);
if (element) {
element.classList.toggle(className, open);
}
};
toggle(SELECTOR_DROPDOWN_TOGGLE, CLASS_NAME_ACTIVE);
toggle(SELECTOR_DROPDOWN_MENU, CLASS_NAME_SHOW);
outerElem.setAttribute('aria-expanded', open);
}
_setAttributeIfNotExists(element, attribute, value) {
if (!element.hasAttribute(attribute)) {
element.setAttribute(attribute, value);
}
}
_elemIsActive(elem) {
return elem.classList.contains(CLASS_NAME_ACTIVE)
}
// Try to get the inner element (usually the .nav-link)
_getInnerElement(elem) {
return elem.matches(SELECTOR_INNER_ELEM) ? elem : SelectorEngine.findOne(SELECTOR_INNER_ELEM, elem)
}
// Try to get the outer element (usually the .nav-item)
_getOuterElement(elem) {
return elem.closest(SELECTOR_OUTER) || elem
}
}
/**
* Data API implementation
*/
if (typeof window !== 'undefined' && typeof document !== 'undefined') {
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
if (['A', 'AREA'].includes(this.tagName)) {
event.preventDefault();
}
if (isDisabled(this)) {
return
}
const t = Tab.getOrCreateInstance(this);
t.dispose();
Tab.getOrCreateInstance(this).show();
});
/**
* Initialize on focus
*/
EventHandler.on(window, EVENT_LOAD_DATA_API, () => {
for (const element of SelectorEngine.find(SELECTOR_DATA_TOGGLE)) {
const t = Tab.getOrCreateInstance(element);
t.dispose();
Tab.getOrCreateInstance(element);
}
});
}
export { Tab as default };
//# sourceMappingURL=tab.js.map