131 lines
3.8 KiB
JavaScript
Executable File
131 lines
3.8 KiB
JavaScript
Executable File
/*!
|
|
* Bootstrap focustrap.js v5.2.3 (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 (v5.2.3): 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
|