| /*! |
| * Bootstrap focustrap.js v5.2.1 (https://getbootstrap.com/) |
| * Copyright 2011-2022 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('../dom/event-handler'), require('../dom/selector-engine'), require('./config')) : |
| typeof define === 'function' && define.amd ? define(['../dom/event-handler', '../dom/selector-engine', './config'], factory) : |
| (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Focustrap = factory(global.EventHandler, global.SelectorEngine, global.Config)); |
| })(this, (function (EventHandler, SelectorEngine, Config) { 'use strict'; |
| |
| const _interopDefaultLegacy = e => e && typeof e === 'object' && 'default' in e ? e : { default: e }; |
| |
| const EventHandler__default = /*#__PURE__*/_interopDefaultLegacy(EventHandler); |
| const SelectorEngine__default = /*#__PURE__*/_interopDefaultLegacy(SelectorEngine); |
| const Config__default = /*#__PURE__*/_interopDefaultLegacy(Config); |
| |
| /** |
| * -------------------------------------------------------------------------- |
| * Bootstrap (v5.2.1): util/focustrap.js |
| * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE) |
| * -------------------------------------------------------------------------- |
| */ |
| /** |
| * Constants |
| */ |
| |
| const NAME = 'focustrap'; |
| const DATA_KEY = 'bs.focustrap'; |
| const EVENT_KEY = `.${DATA_KEY}`; |
| const EVENT_FOCUSIN = `focusin${EVENT_KEY}`; |
| const EVENT_KEYDOWN_TAB = `keydown.tab${EVENT_KEY}`; |
| const TAB_KEY = 'Tab'; |
| const TAB_NAV_FORWARD = 'forward'; |
| const TAB_NAV_BACKWARD = 'backward'; |
| const Default = { |
| autofocus: true, |
| trapElement: null // The element to trap focus inside of |
| |
| }; |
| const DefaultType = { |
| autofocus: 'boolean', |
| trapElement: 'element' |
| }; |
| /** |
| * Class definition |
| */ |
| |
| class FocusTrap extends Config__default.default { |
| constructor(config) { |
| super(); |
| this._config = this._getConfig(config); |
| this._isActive = false; |
| this._lastTabNavDirection = null; |
| } // Getters |
| |
| |
| static get Default() { |
| return Default; |
| } |
| |
| static get DefaultType() { |
| return DefaultType; |
| } |
| |
| static get NAME() { |
| return NAME; |
| } // Public |
| |
| |
| activate() { |
| if (this._isActive) { |
| return; |
| } |
| |
| if (this._config.autofocus) { |
| this._config.trapElement.focus(); |
| } |
| |
| EventHandler__default.default.off(document, EVENT_KEY); // guard against infinite focus loop |
| |
| EventHandler__default.default.on(document, EVENT_FOCUSIN, event => this._handleFocusin(event)); |
| EventHandler__default.default.on(document, EVENT_KEYDOWN_TAB, event => this._handleKeydown(event)); |
| this._isActive = true; |
| } |
| |
| deactivate() { |
| if (!this._isActive) { |
| return; |
| } |
| |
| this._isActive = false; |
| EventHandler__default.default.off(document, EVENT_KEY); |
| } // Private |
| |
| |
| _handleFocusin(event) { |
| const { |
| trapElement |
| } = this._config; |
| |
| if (event.target === document || event.target === trapElement || trapElement.contains(event.target)) { |
| return; |
| } |
| |
| const elements = SelectorEngine__default.default.focusableChildren(trapElement); |
| |
| if (elements.length === 0) { |
| trapElement.focus(); |
| } else if (this._lastTabNavDirection === TAB_NAV_BACKWARD) { |
| elements[elements.length - 1].focus(); |
| } else { |
| elements[0].focus(); |
| } |
| } |
| |
| _handleKeydown(event) { |
| if (event.key !== TAB_KEY) { |
| return; |
| } |
| |
| this._lastTabNavDirection = event.shiftKey ? TAB_NAV_BACKWARD : TAB_NAV_FORWARD; |
| } |
| |
| } |
| |
| return FocusTrap; |
| |
| })); |
| //# sourceMappingURL=focustrap.js.map |