784 lines
33 KiB
JavaScript
784 lines
33 KiB
JavaScript
/*!
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* focus-trap 7.4.3
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* @license MIT, https://github.com/focus-trap/focus-trap/blob/master/LICENSE
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('tabbable')) :
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typeof define === 'function' && define.amd ? define(['exports', 'tabbable'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, (function () {
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var current = global.focusTrap;
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var exports = global.focusTrap = {};
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factory(exports, global.tabbable);
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exports.noConflict = function () { global.focusTrap = current; return exports; };
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})());
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})(this, (function (exports, tabbable) { 'use strict';
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function ownKeys(object, enumerableOnly) {
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var keys = Object.keys(object);
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if (Object.getOwnPropertySymbols) {
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var symbols = Object.getOwnPropertySymbols(object);
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enumerableOnly && (symbols = symbols.filter(function (sym) {
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return Object.getOwnPropertyDescriptor(object, sym).enumerable;
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})), keys.push.apply(keys, symbols);
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}
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return keys;
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}
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function _objectSpread2(target) {
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for (var i = 1; i < arguments.length; i++) {
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var source = null != arguments[i] ? arguments[i] : {};
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i % 2 ? ownKeys(Object(source), !0).forEach(function (key) {
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_defineProperty(target, key, source[key]);
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}) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) {
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Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
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});
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}
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return target;
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}
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function _defineProperty(obj, key, value) {
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key = _toPropertyKey(key);
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if (key in obj) {
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Object.defineProperty(obj, key, {
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value: value,
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enumerable: true,
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configurable: true,
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writable: true
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});
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} else {
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obj[key] = value;
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}
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return obj;
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}
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function _toPrimitive(input, hint) {
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if (typeof input !== "object" || input === null) return input;
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var prim = input[Symbol.toPrimitive];
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if (prim !== undefined) {
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var res = prim.call(input, hint || "default");
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if (typeof res !== "object") return res;
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throw new TypeError("@@toPrimitive must return a primitive value.");
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}
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return (hint === "string" ? String : Number)(input);
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}
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function _toPropertyKey(arg) {
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var key = _toPrimitive(arg, "string");
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return typeof key === "symbol" ? key : String(key);
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}
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var activeFocusTraps = {
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activateTrap: function activateTrap(trapStack, trap) {
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if (trapStack.length > 0) {
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var activeTrap = trapStack[trapStack.length - 1];
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if (activeTrap !== trap) {
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activeTrap.pause();
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}
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}
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var trapIndex = trapStack.indexOf(trap);
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if (trapIndex === -1) {
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trapStack.push(trap);
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} else {
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// move this existing trap to the front of the queue
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trapStack.splice(trapIndex, 1);
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trapStack.push(trap);
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}
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},
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deactivateTrap: function deactivateTrap(trapStack, trap) {
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var trapIndex = trapStack.indexOf(trap);
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if (trapIndex !== -1) {
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trapStack.splice(trapIndex, 1);
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}
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if (trapStack.length > 0) {
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trapStack[trapStack.length - 1].unpause();
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}
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}
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};
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var isSelectableInput = function isSelectableInput(node) {
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return node.tagName && node.tagName.toLowerCase() === 'input' && typeof node.select === 'function';
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};
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var isEscapeEvent = function isEscapeEvent(e) {
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return e.key === 'Escape' || e.key === 'Esc' || e.keyCode === 27;
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};
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var isTabEvent = function isTabEvent(e) {
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return e.key === 'Tab' || e.keyCode === 9;
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};
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// checks for TAB by default
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var isKeyForward = function isKeyForward(e) {
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return isTabEvent(e) && !e.shiftKey;
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};
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// checks for SHIFT+TAB by default
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var isKeyBackward = function isKeyBackward(e) {
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return isTabEvent(e) && e.shiftKey;
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};
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var delay = function delay(fn) {
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return setTimeout(fn, 0);
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};
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// Array.find/findIndex() are not supported on IE; this replicates enough
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// of Array.findIndex() for our needs
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var findIndex = function findIndex(arr, fn) {
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var idx = -1;
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arr.every(function (value, i) {
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if (fn(value)) {
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idx = i;
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return false; // break
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}
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return true; // next
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});
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return idx;
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};
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/**
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* Get an option's value when it could be a plain value, or a handler that provides
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* the value.
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* @param {*} value Option's value to check.
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* @param {...*} [params] Any parameters to pass to the handler, if `value` is a function.
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* @returns {*} The `value`, or the handler's returned value.
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*/
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var valueOrHandler = function valueOrHandler(value) {
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for (var _len = arguments.length, params = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
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params[_key - 1] = arguments[_key];
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}
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return typeof value === 'function' ? value.apply(void 0, params) : value;
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};
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var getActualTarget = function getActualTarget(event) {
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// NOTE: If the trap is _inside_ a shadow DOM, event.target will always be the
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// shadow host. However, event.target.composedPath() will be an array of
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// nodes "clicked" from inner-most (the actual element inside the shadow) to
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// outer-most (the host HTML document). If we have access to composedPath(),
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// then use its first element; otherwise, fall back to event.target (and
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// this only works for an _open_ shadow DOM; otherwise,
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// composedPath()[0] === event.target always).
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return event.target.shadowRoot && typeof event.composedPath === 'function' ? event.composedPath()[0] : event.target;
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};
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// NOTE: this must be _outside_ `createFocusTrap()` to make sure all traps in this
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// current instance use the same stack if `userOptions.trapStack` isn't specified
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var internalTrapStack = [];
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var createFocusTrap = function createFocusTrap(elements, userOptions) {
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// SSR: a live trap shouldn't be created in this type of environment so this
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// should be safe code to execute if the `document` option isn't specified
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var doc = (userOptions === null || userOptions === void 0 ? void 0 : userOptions.document) || document;
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var trapStack = (userOptions === null || userOptions === void 0 ? void 0 : userOptions.trapStack) || internalTrapStack;
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var config = _objectSpread2({
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returnFocusOnDeactivate: true,
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escapeDeactivates: true,
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delayInitialFocus: true,
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isKeyForward: isKeyForward,
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isKeyBackward: isKeyBackward
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}, userOptions);
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var state = {
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// containers given to createFocusTrap()
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// @type {Array<HTMLElement>}
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containers: [],
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// list of objects identifying tabbable nodes in `containers` in the trap
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// NOTE: it's possible that a group has no tabbable nodes if nodes get removed while the trap
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// is active, but the trap should never get to a state where there isn't at least one group
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// with at least one tabbable node in it (that would lead to an error condition that would
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// result in an error being thrown)
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// @type {Array<{
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// container: HTMLElement,
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// tabbableNodes: Array<HTMLElement>, // empty if none
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// focusableNodes: Array<HTMLElement>, // empty if none
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// firstTabbableNode: HTMLElement|null,
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// lastTabbableNode: HTMLElement|null,
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// nextTabbableNode: (node: HTMLElement, forward: boolean) => HTMLElement|undefined
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// }>}
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containerGroups: [],
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// same order/length as `containers` list
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// references to objects in `containerGroups`, but only those that actually have
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// tabbable nodes in them
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// NOTE: same order as `containers` and `containerGroups`, but __not necessarily__
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// the same length
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tabbableGroups: [],
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nodeFocusedBeforeActivation: null,
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mostRecentlyFocusedNode: null,
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active: false,
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paused: false,
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// timer ID for when delayInitialFocus is true and initial focus in this trap
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// has been delayed during activation
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delayInitialFocusTimer: undefined
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};
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var trap; // eslint-disable-line prefer-const -- some private functions reference it, and its methods reference private functions, so we must declare here and define later
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/**
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* Gets a configuration option value.
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* @param {Object|undefined} configOverrideOptions If true, and option is defined in this set,
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* value will be taken from this object. Otherwise, value will be taken from base configuration.
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* @param {string} optionName Name of the option whose value is sought.
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* @param {string|undefined} [configOptionName] Name of option to use __instead of__ `optionName`
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* IIF `configOverrideOptions` is not defined. Otherwise, `optionName` is used.
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*/
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var getOption = function getOption(configOverrideOptions, optionName, configOptionName) {
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return configOverrideOptions && configOverrideOptions[optionName] !== undefined ? configOverrideOptions[optionName] : config[configOptionName || optionName];
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};
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/**
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* Finds the index of the container that contains the element.
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* @param {HTMLElement} element
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* @param {Event} [event]
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* @returns {number} Index of the container in either `state.containers` or
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* `state.containerGroups` (the order/length of these lists are the same); -1
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* if the element isn't found.
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*/
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var findContainerIndex = function findContainerIndex(element, event) {
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var composedPath = typeof (event === null || event === void 0 ? void 0 : event.composedPath) === 'function' ? event.composedPath() : undefined;
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// NOTE: search `containerGroups` because it's possible a group contains no tabbable
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// nodes, but still contains focusable nodes (e.g. if they all have `tabindex=-1`)
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// and we still need to find the element in there
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return state.containerGroups.findIndex(function (_ref) {
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var container = _ref.container,
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tabbableNodes = _ref.tabbableNodes;
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return container.contains(element) || ( // fall back to explicit tabbable search which will take into consideration any
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// web components if the `tabbableOptions.getShadowRoot` option was used for
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// the trap, enabling shadow DOM support in tabbable (`Node.contains()` doesn't
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// look inside web components even if open)
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composedPath === null || composedPath === void 0 ? void 0 : composedPath.includes(container)) || tabbableNodes.find(function (node) {
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return node === element;
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});
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});
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};
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/**
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* Gets the node for the given option, which is expected to be an option that
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* can be either a DOM node, a string that is a selector to get a node, `false`
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* (if a node is explicitly NOT given), or a function that returns any of these
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* values.
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* @param {string} optionName
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* @returns {undefined | false | HTMLElement | SVGElement} Returns
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* `undefined` if the option is not specified; `false` if the option
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* resolved to `false` (node explicitly not given); otherwise, the resolved
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* DOM node.
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* @throws {Error} If the option is set, not `false`, and is not, or does not
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* resolve to a node.
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*/
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var getNodeForOption = function getNodeForOption(optionName) {
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var optionValue = config[optionName];
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if (typeof optionValue === 'function') {
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for (var _len2 = arguments.length, params = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
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params[_key2 - 1] = arguments[_key2];
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}
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optionValue = optionValue.apply(void 0, params);
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}
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if (optionValue === true) {
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optionValue = undefined; // use default value
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}
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if (!optionValue) {
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if (optionValue === undefined || optionValue === false) {
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return optionValue;
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}
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// else, empty string (invalid), null (invalid), 0 (invalid)
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throw new Error("`".concat(optionName, "` was specified but was not a node, or did not return a node"));
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}
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var node = optionValue; // could be HTMLElement, SVGElement, or non-empty string at this point
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if (typeof optionValue === 'string') {
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node = doc.querySelector(optionValue); // resolve to node, or null if fails
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if (!node) {
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throw new Error("`".concat(optionName, "` as selector refers to no known node"));
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}
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}
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return node;
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};
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var getInitialFocusNode = function getInitialFocusNode() {
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var node = getNodeForOption('initialFocus');
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// false explicitly indicates we want no initialFocus at all
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if (node === false) {
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return false;
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}
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if (node === undefined || !tabbable.isFocusable(node, config.tabbableOptions)) {
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// option not specified nor focusable: use fallback options
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if (findContainerIndex(doc.activeElement) >= 0) {
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node = doc.activeElement;
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} else {
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var firstTabbableGroup = state.tabbableGroups[0];
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var firstTabbableNode = firstTabbableGroup && firstTabbableGroup.firstTabbableNode;
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// NOTE: `fallbackFocus` option function cannot return `false` (not supported)
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node = firstTabbableNode || getNodeForOption('fallbackFocus');
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}
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}
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if (!node) {
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throw new Error('Your focus-trap needs to have at least one focusable element');
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}
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return node;
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};
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var updateTabbableNodes = function updateTabbableNodes() {
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state.containerGroups = state.containers.map(function (container) {
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var tabbableNodes = tabbable.tabbable(container, config.tabbableOptions);
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// NOTE: if we have tabbable nodes, we must have focusable nodes; focusable nodes
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// are a superset of tabbable nodes
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var focusableNodes = tabbable.focusable(container, config.tabbableOptions);
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return {
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container: container,
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tabbableNodes: tabbableNodes,
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focusableNodes: focusableNodes,
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firstTabbableNode: tabbableNodes.length > 0 ? tabbableNodes[0] : null,
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lastTabbableNode: tabbableNodes.length > 0 ? tabbableNodes[tabbableNodes.length - 1] : null,
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/**
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* Finds the __tabbable__ node that follows the given node in the specified direction,
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* in this container, if any.
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* @param {HTMLElement} node
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* @param {boolean} [forward] True if going in forward tab order; false if going
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* in reverse.
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* @returns {HTMLElement|undefined} The next tabbable node, if any.
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*/
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nextTabbableNode: function nextTabbableNode(node) {
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var forward = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
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// NOTE: If tabindex is positive (in order to manipulate the tab order separate
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// from the DOM order), this __will not work__ because the list of focusableNodes,
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// while it contains tabbable nodes, does not sort its nodes in any order other
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// than DOM order, because it can't: Where would you place focusable (but not
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// tabbable) nodes in that order? They have no order, because they aren't tabbale...
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// Support for positive tabindex is already broken and hard to manage (possibly
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// not supportable, TBD), so this isn't going to make things worse than they
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// already are, and at least makes things better for the majority of cases where
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// tabindex is either 0/unset or negative.
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// FYI, positive tabindex issue: https://github.com/focus-trap/focus-trap/issues/375
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var nodeIdx = focusableNodes.findIndex(function (n) {
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return n === node;
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});
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if (nodeIdx < 0) {
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return undefined;
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}
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if (forward) {
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return focusableNodes.slice(nodeIdx + 1).find(function (n) {
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return tabbable.isTabbable(n, config.tabbableOptions);
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});
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}
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return focusableNodes.slice(0, nodeIdx).reverse().find(function (n) {
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return tabbable.isTabbable(n, config.tabbableOptions);
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});
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}
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};
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});
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state.tabbableGroups = state.containerGroups.filter(function (group) {
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return group.tabbableNodes.length > 0;
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});
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// throw if no groups have tabbable nodes and we don't have a fallback focus node either
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if (state.tabbableGroups.length <= 0 && !getNodeForOption('fallbackFocus') // returning false not supported for this option
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) {
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throw new Error('Your focus-trap must have at least one container with at least one tabbable node in it at all times');
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}
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};
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var tryFocus = function tryFocus(node) {
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if (node === false) {
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return;
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}
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if (node === doc.activeElement) {
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return;
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}
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if (!node || !node.focus) {
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tryFocus(getInitialFocusNode());
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return;
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}
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node.focus({
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preventScroll: !!config.preventScroll
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});
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state.mostRecentlyFocusedNode = node;
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if (isSelectableInput(node)) {
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node.select();
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}
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};
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var getReturnFocusNode = function getReturnFocusNode(previousActiveElement) {
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var node = getNodeForOption('setReturnFocus', previousActiveElement);
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return node ? node : node === false ? false : previousActiveElement;
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};
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// This needs to be done on mousedown and touchstart instead of click
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// so that it precedes the focus event.
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var checkPointerDown = function checkPointerDown(e) {
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var target = getActualTarget(e);
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if (findContainerIndex(target, e) >= 0) {
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// allow the click since it ocurred inside the trap
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return;
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}
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if (valueOrHandler(config.clickOutsideDeactivates, e)) {
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// immediately deactivate the trap
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trap.deactivate({
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// NOTE: by setting `returnFocus: false`, deactivate() will do nothing,
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// which will result in the outside click setting focus to the node
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// that was clicked (and if not focusable, to "nothing"); by setting
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// `returnFocus: true`, we'll attempt to re-focus the node originally-focused
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// on activation (or the configured `setReturnFocus` node), whether the
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// outside click was on a focusable node or not
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returnFocus: config.returnFocusOnDeactivate
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});
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return;
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}
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// This is needed for mobile devices.
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// (If we'll only let `click` events through,
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// then on mobile they will be blocked anyways if `touchstart` is blocked.)
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if (valueOrHandler(config.allowOutsideClick, e)) {
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// allow the click outside the trap to take place
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return;
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}
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// otherwise, prevent the click
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e.preventDefault();
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};
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// In case focus escapes the trap for some strange reason, pull it back in.
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var checkFocusIn = function checkFocusIn(e) {
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var target = getActualTarget(e);
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var targetContained = findContainerIndex(target, e) >= 0;
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// In Firefox when you Tab out of an iframe the Document is briefly focused.
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if (targetContained || target instanceof Document) {
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if (targetContained) {
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state.mostRecentlyFocusedNode = target;
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}
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} else {
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// escaped! pull it back in to where it just left
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e.stopImmediatePropagation();
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tryFocus(state.mostRecentlyFocusedNode || getInitialFocusNode());
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}
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};
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// Hijack key nav events on the first and last focusable nodes of the trap,
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// in order to prevent focus from escaping. If it escapes for even a
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// moment it can end up scrolling the page and causing confusion so we
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// kind of need to capture the action at the keydown phase.
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var checkKeyNav = function checkKeyNav(event) {
|
|
var isBackward = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
|
|
var target = getActualTarget(event);
|
|
updateTabbableNodes();
|
|
var destinationNode = null;
|
|
if (state.tabbableGroups.length > 0) {
|
|
// make sure the target is actually contained in a group
|
|
// NOTE: the target may also be the container itself if it's focusable
|
|
// with tabIndex='-1' and was given initial focus
|
|
var containerIndex = findContainerIndex(target, event);
|
|
var containerGroup = containerIndex >= 0 ? state.containerGroups[containerIndex] : undefined;
|
|
if (containerIndex < 0) {
|
|
// target not found in any group: quite possible focus has escaped the trap,
|
|
// so bring it back into...
|
|
if (isBackward) {
|
|
// ...the last node in the last group
|
|
destinationNode = state.tabbableGroups[state.tabbableGroups.length - 1].lastTabbableNode;
|
|
} else {
|
|
// ...the first node in the first group
|
|
destinationNode = state.tabbableGroups[0].firstTabbableNode;
|
|
}
|
|
} else if (isBackward) {
|
|
// REVERSE
|
|
|
|
// is the target the first tabbable node in a group?
|
|
var startOfGroupIndex = findIndex(state.tabbableGroups, function (_ref2) {
|
|
var firstTabbableNode = _ref2.firstTabbableNode;
|
|
return target === firstTabbableNode;
|
|
});
|
|
if (startOfGroupIndex < 0 && (containerGroup.container === target || tabbable.isFocusable(target, config.tabbableOptions) && !tabbable.isTabbable(target, config.tabbableOptions) && !containerGroup.nextTabbableNode(target, false))) {
|
|
// an exception case where the target is either the container itself, or
|
|
// a non-tabbable node that was given focus (i.e. tabindex is negative
|
|
// and user clicked on it or node was programmatically given focus)
|
|
// and is not followed by any other tabbable node, in which
|
|
// case, we should handle shift+tab as if focus were on the container's
|
|
// first tabbable node, and go to the last tabbable node of the LAST group
|
|
startOfGroupIndex = containerIndex;
|
|
}
|
|
if (startOfGroupIndex >= 0) {
|
|
// YES: then shift+tab should go to the last tabbable node in the
|
|
// previous group (and wrap around to the last tabbable node of
|
|
// the LAST group if it's the first tabbable node of the FIRST group)
|
|
var destinationGroupIndex = startOfGroupIndex === 0 ? state.tabbableGroups.length - 1 : startOfGroupIndex - 1;
|
|
var destinationGroup = state.tabbableGroups[destinationGroupIndex];
|
|
destinationNode = destinationGroup.lastTabbableNode;
|
|
} else if (!isTabEvent(event)) {
|
|
// user must have customized the nav keys so we have to move focus manually _within_
|
|
// the active group: do this based on the order determined by tabbable()
|
|
destinationNode = containerGroup.nextTabbableNode(target, false);
|
|
}
|
|
} else {
|
|
// FORWARD
|
|
|
|
// is the target the last tabbable node in a group?
|
|
var lastOfGroupIndex = findIndex(state.tabbableGroups, function (_ref3) {
|
|
var lastTabbableNode = _ref3.lastTabbableNode;
|
|
return target === lastTabbableNode;
|
|
});
|
|
if (lastOfGroupIndex < 0 && (containerGroup.container === target || tabbable.isFocusable(target, config.tabbableOptions) && !tabbable.isTabbable(target, config.tabbableOptions) && !containerGroup.nextTabbableNode(target))) {
|
|
// an exception case where the target is the container itself, or
|
|
// a non-tabbable node that was given focus (i.e. tabindex is negative
|
|
// and user clicked on it or node was programmatically given focus)
|
|
// and is not followed by any other tabbable node, in which
|
|
// case, we should handle tab as if focus were on the container's
|
|
// last tabbable node, and go to the first tabbable node of the FIRST group
|
|
lastOfGroupIndex = containerIndex;
|
|
}
|
|
if (lastOfGroupIndex >= 0) {
|
|
// YES: then tab should go to the first tabbable node in the next
|
|
// group (and wrap around to the first tabbable node of the FIRST
|
|
// group if it's the last tabbable node of the LAST group)
|
|
var _destinationGroupIndex = lastOfGroupIndex === state.tabbableGroups.length - 1 ? 0 : lastOfGroupIndex + 1;
|
|
var _destinationGroup = state.tabbableGroups[_destinationGroupIndex];
|
|
destinationNode = _destinationGroup.firstTabbableNode;
|
|
} else if (!isTabEvent(event)) {
|
|
// user must have customized the nav keys so we have to move focus manually _within_
|
|
// the active group: do this based on the order determined by tabbable()
|
|
destinationNode = containerGroup.nextTabbableNode(target);
|
|
}
|
|
}
|
|
} else {
|
|
// no groups available
|
|
// NOTE: the fallbackFocus option does not support returning false to opt-out
|
|
destinationNode = getNodeForOption('fallbackFocus');
|
|
}
|
|
if (destinationNode) {
|
|
if (isTabEvent(event)) {
|
|
// since tab natively moves focus, we wouldn't have a destination node unless we
|
|
// were on the edge of a container and had to move to the next/previous edge, in
|
|
// which case we want to prevent default to keep the browser from moving focus
|
|
// to where it normally would
|
|
event.preventDefault();
|
|
}
|
|
tryFocus(destinationNode);
|
|
}
|
|
// else, let the browser take care of [shift+]tab and move the focus
|
|
};
|
|
|
|
var checkKey = function checkKey(event) {
|
|
if (isEscapeEvent(event) && valueOrHandler(config.escapeDeactivates, event) !== false) {
|
|
event.preventDefault();
|
|
trap.deactivate();
|
|
return;
|
|
}
|
|
if (config.isKeyForward(event) || config.isKeyBackward(event)) {
|
|
checkKeyNav(event, config.isKeyBackward(event));
|
|
}
|
|
};
|
|
var checkClick = function checkClick(e) {
|
|
var target = getActualTarget(e);
|
|
if (findContainerIndex(target, e) >= 0) {
|
|
return;
|
|
}
|
|
if (valueOrHandler(config.clickOutsideDeactivates, e)) {
|
|
return;
|
|
}
|
|
if (valueOrHandler(config.allowOutsideClick, e)) {
|
|
return;
|
|
}
|
|
e.preventDefault();
|
|
e.stopImmediatePropagation();
|
|
};
|
|
|
|
//
|
|
// EVENT LISTENERS
|
|
//
|
|
|
|
var addListeners = function addListeners() {
|
|
if (!state.active) {
|
|
return;
|
|
}
|
|
|
|
// There can be only one listening focus trap at a time
|
|
activeFocusTraps.activateTrap(trapStack, trap);
|
|
|
|
// Delay ensures that the focused element doesn't capture the event
|
|
// that caused the focus trap activation.
|
|
state.delayInitialFocusTimer = config.delayInitialFocus ? delay(function () {
|
|
tryFocus(getInitialFocusNode());
|
|
}) : tryFocus(getInitialFocusNode());
|
|
doc.addEventListener('focusin', checkFocusIn, true);
|
|
doc.addEventListener('mousedown', checkPointerDown, {
|
|
capture: true,
|
|
passive: false
|
|
});
|
|
doc.addEventListener('touchstart', checkPointerDown, {
|
|
capture: true,
|
|
passive: false
|
|
});
|
|
doc.addEventListener('click', checkClick, {
|
|
capture: true,
|
|
passive: false
|
|
});
|
|
doc.addEventListener('keydown', checkKey, {
|
|
capture: true,
|
|
passive: false
|
|
});
|
|
return trap;
|
|
};
|
|
var removeListeners = function removeListeners() {
|
|
if (!state.active) {
|
|
return;
|
|
}
|
|
doc.removeEventListener('focusin', checkFocusIn, true);
|
|
doc.removeEventListener('mousedown', checkPointerDown, true);
|
|
doc.removeEventListener('touchstart', checkPointerDown, true);
|
|
doc.removeEventListener('click', checkClick, true);
|
|
doc.removeEventListener('keydown', checkKey, true);
|
|
return trap;
|
|
};
|
|
|
|
//
|
|
// MUTATION OBSERVER
|
|
//
|
|
|
|
var checkDomRemoval = function checkDomRemoval(mutations) {
|
|
var isFocusedNodeRemoved = mutations.some(function (mutation) {
|
|
var removedNodes = Array.from(mutation.removedNodes);
|
|
return removedNodes.some(function (node) {
|
|
return node === state.mostRecentlyFocusedNode;
|
|
});
|
|
});
|
|
|
|
// If the currently focused is removed then browsers will move focus to the
|
|
// <body> element. If this happens, try to move focus back into the trap.
|
|
if (isFocusedNodeRemoved) {
|
|
tryFocus(getInitialFocusNode());
|
|
}
|
|
};
|
|
|
|
// Use MutationObserver - if supported - to detect if focused node is removed
|
|
// from the DOM.
|
|
var mutationObserver = typeof window !== 'undefined' && 'MutationObserver' in window ? new MutationObserver(checkDomRemoval) : undefined;
|
|
var updateObservedNodes = function updateObservedNodes() {
|
|
if (!mutationObserver) {
|
|
return;
|
|
}
|
|
mutationObserver.disconnect();
|
|
if (state.active && !state.paused) {
|
|
state.containers.map(function (container) {
|
|
mutationObserver.observe(container, {
|
|
subtree: true,
|
|
childList: true
|
|
});
|
|
});
|
|
}
|
|
};
|
|
|
|
//
|
|
// TRAP DEFINITION
|
|
//
|
|
|
|
trap = {
|
|
get active() {
|
|
return state.active;
|
|
},
|
|
get paused() {
|
|
return state.paused;
|
|
},
|
|
activate: function activate(activateOptions) {
|
|
if (state.active) {
|
|
return this;
|
|
}
|
|
var onActivate = getOption(activateOptions, 'onActivate');
|
|
var onPostActivate = getOption(activateOptions, 'onPostActivate');
|
|
var checkCanFocusTrap = getOption(activateOptions, 'checkCanFocusTrap');
|
|
if (!checkCanFocusTrap) {
|
|
updateTabbableNodes();
|
|
}
|
|
state.active = true;
|
|
state.paused = false;
|
|
state.nodeFocusedBeforeActivation = doc.activeElement;
|
|
onActivate === null || onActivate === void 0 ? void 0 : onActivate();
|
|
var finishActivation = function finishActivation() {
|
|
if (checkCanFocusTrap) {
|
|
updateTabbableNodes();
|
|
}
|
|
addListeners();
|
|
updateObservedNodes();
|
|
onPostActivate === null || onPostActivate === void 0 ? void 0 : onPostActivate();
|
|
};
|
|
if (checkCanFocusTrap) {
|
|
checkCanFocusTrap(state.containers.concat()).then(finishActivation, finishActivation);
|
|
return this;
|
|
}
|
|
finishActivation();
|
|
return this;
|
|
},
|
|
deactivate: function deactivate(deactivateOptions) {
|
|
if (!state.active) {
|
|
return this;
|
|
}
|
|
var options = _objectSpread2({
|
|
onDeactivate: config.onDeactivate,
|
|
onPostDeactivate: config.onPostDeactivate,
|
|
checkCanReturnFocus: config.checkCanReturnFocus
|
|
}, deactivateOptions);
|
|
clearTimeout(state.delayInitialFocusTimer); // noop if undefined
|
|
state.delayInitialFocusTimer = undefined;
|
|
removeListeners();
|
|
state.active = false;
|
|
state.paused = false;
|
|
updateObservedNodes();
|
|
activeFocusTraps.deactivateTrap(trapStack, trap);
|
|
var onDeactivate = getOption(options, 'onDeactivate');
|
|
var onPostDeactivate = getOption(options, 'onPostDeactivate');
|
|
var checkCanReturnFocus = getOption(options, 'checkCanReturnFocus');
|
|
var returnFocus = getOption(options, 'returnFocus', 'returnFocusOnDeactivate');
|
|
onDeactivate === null || onDeactivate === void 0 ? void 0 : onDeactivate();
|
|
var finishDeactivation = function finishDeactivation() {
|
|
delay(function () {
|
|
if (returnFocus) {
|
|
tryFocus(getReturnFocusNode(state.nodeFocusedBeforeActivation));
|
|
}
|
|
onPostDeactivate === null || onPostDeactivate === void 0 ? void 0 : onPostDeactivate();
|
|
});
|
|
};
|
|
if (returnFocus && checkCanReturnFocus) {
|
|
checkCanReturnFocus(getReturnFocusNode(state.nodeFocusedBeforeActivation)).then(finishDeactivation, finishDeactivation);
|
|
return this;
|
|
}
|
|
finishDeactivation();
|
|
return this;
|
|
},
|
|
pause: function pause(pauseOptions) {
|
|
if (state.paused || !state.active) {
|
|
return this;
|
|
}
|
|
var onPause = getOption(pauseOptions, 'onPause');
|
|
var onPostPause = getOption(pauseOptions, 'onPostPause');
|
|
state.paused = true;
|
|
onPause === null || onPause === void 0 ? void 0 : onPause();
|
|
removeListeners();
|
|
updateObservedNodes();
|
|
onPostPause === null || onPostPause === void 0 ? void 0 : onPostPause();
|
|
return this;
|
|
},
|
|
unpause: function unpause(unpauseOptions) {
|
|
if (!state.paused || !state.active) {
|
|
return this;
|
|
}
|
|
var onUnpause = getOption(unpauseOptions, 'onUnpause');
|
|
var onPostUnpause = getOption(unpauseOptions, 'onPostUnpause');
|
|
state.paused = false;
|
|
onUnpause === null || onUnpause === void 0 ? void 0 : onUnpause();
|
|
updateTabbableNodes();
|
|
addListeners();
|
|
updateObservedNodes();
|
|
onPostUnpause === null || onPostUnpause === void 0 ? void 0 : onPostUnpause();
|
|
return this;
|
|
},
|
|
updateContainerElements: function updateContainerElements(containerElements) {
|
|
var elementsAsArray = [].concat(containerElements).filter(Boolean);
|
|
state.containers = elementsAsArray.map(function (element) {
|
|
return typeof element === 'string' ? doc.querySelector(element) : element;
|
|
});
|
|
if (state.active) {
|
|
updateTabbableNodes();
|
|
}
|
|
updateObservedNodes();
|
|
return this;
|
|
}
|
|
};
|
|
|
|
// initialize container elements
|
|
trap.updateContainerElements(elements);
|
|
return trap;
|
|
};
|
|
|
|
exports.createFocusTrap = createFocusTrap;
|
|
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
|
|
|
}));
|
|
//# sourceMappingURL=focus-trap.umd.js.map
|