| 1 |
|
| 2 | export const Dropdown = {
|
| 3 |
|
| 4 | _collection: {},
|
| 5 |
|
| 6 | init(dropdown) {
|
| 7 | dropdown = this._elOrId(dropdown);
|
| 8 | if (dropdown._dropdown === undefined) {
|
| 9 | dropdown._dropdown = true;
|
| 10 | } else {
|
| 11 | return false;
|
| 12 | }
|
| 13 |
|
| 14 | if (dropdown.id !== undefined) {
|
| 15 | this._collection[dropdown.id] = dropdown;
|
| 16 | }
|
| 17 | const toggle_btn = this.getDropdownToggleBtn(dropdown);
|
| 18 | if (toggle_btn !== null) {
|
| 19 | this._makeUnclosableInside(dropdown);
|
| 20 | this._attachToggleClickEvent(dropdown);
|
| 21 | this._attachToggleBtnMethods(dropdown);
|
| 22 | }
|
| 23 | return true;
|
| 24 | },
|
| 25 |
|
| 26 | _elOrId(dropdown) {
|
| 27 | if (typeof dropdown === 'string') {
|
| 28 | return document.getElementById(dropdown);
|
| 29 | }
|
| 30 | return dropdown;
|
| 31 | },
|
| 32 |
|
| 33 | _attachToggleClickEvent(dropdown) {
|
| 34 | this.getDropdownToggleBtn(dropdown).addEventListener('click', (e) => {
|
| 35 | e.stopPropagation();
|
| 36 | this.toggle(dropdown);
|
| 37 | });
|
| 38 | },
|
| 39 |
|
| 40 | get(id) {
|
| 41 | return this._collection[id];
|
| 42 | },
|
| 43 |
|
| 44 | getDropdownToggleBtn(dropdown) {
|
| 45 | dropdown = this._elOrId(dropdown);
|
| 46 |
|
| 47 | return dropdown.querySelector('[data-toggle="dropdown"]');
|
| 48 | },
|
| 49 |
|
| 50 | getDropdownMenu(dropdown) {
|
| 51 | dropdown = this._elOrId(dropdown);
|
| 52 | return dropdown.getElementsByClassName('dropdown-menu')[0];
|
| 53 | },
|
| 54 |
|
| 55 | isClosableInside(dropdown) {
|
| 56 | return dropdown.hasAttribute('data-close-inside');
|
| 57 | },
|
| 58 |
|
| 59 | _makeUnclosableInside(dropdown) {
|
| 60 | if (this.isClosableInside(dropdown)) {
|
| 61 | this.getDropdownMenu(dropdown).addEventListener('click', (e) => {
|
| 62 | e.stopPropagation();
|
| 63 | })
|
| 64 | }
|
| 65 | },
|
| 66 |
|
| 67 | _getCloseEvent(dropdown) {
|
| 68 | return new CustomEvent('close', {detail: {dropdown: dropdown}});
|
| 69 | },
|
| 70 |
|
| 71 | _getOpenEvent(dropdown) {
|
| 72 | return new CustomEvent('open', {detail: {dropdown: dropdown}});
|
| 73 | },
|
| 74 |
|
| 75 | _bodyHandler(dropdown) {
|
| 76 | if (dropdown.classList.contains('open')) {
|
| 77 | this.close(dropdown);
|
| 78 | }
|
| 79 | },
|
| 80 |
|
| 81 | _getUniqueBodyHandler(dropdown) {
|
| 82 | if (dropdown._bodyHandler === undefined) {
|
| 83 | dropdown._bodyHandler = this._bodyHandler.bind(this, dropdown);
|
| 84 | }
|
| 85 | return dropdown._bodyHandler;
|
| 86 | },
|
| 87 |
|
| 88 | close(dropdown) {
|
| 89 | dropdown = this._elOrId(dropdown);
|
| 90 | dropdown.classList.remove('open');
|
| 91 | document.body.removeEventListener('click', this._getUniqueBodyHandler(dropdown));
|
| 92 | this.getDropdownToggleBtn(dropdown).dispatchEvent(this._getCloseEvent(dropdown));
|
| 93 | },
|
| 94 |
|
| 95 | _attachToggleBtnMethods(dropdown) {
|
| 96 | const toggle_btn = this.getDropdownToggleBtn(dropdown);
|
| 97 | toggle_btn.close = function() {
|
| 98 | this.close(dropdown);
|
| 99 | };
|
| 100 | toggle_btn.open = function() {
|
| 101 | this.open(dropdown);
|
| 102 | };
|
| 103 | toggle_btn.toggle = function() {
|
| 104 | this.toggle(dropdown);
|
| 105 | };
|
| 106 | },
|
| 107 |
|
| 108 | open(dropdown) {
|
| 109 | dropdown = this._elOrId(dropdown);
|
| 110 | dropdown.classList.add('open');
|
| 111 | document.body.addEventListener('click', this._getUniqueBodyHandler(dropdown));
|
| 112 | this.getDropdownToggleBtn(dropdown).dispatchEvent(this._getOpenEvent(dropdown));
|
| 113 | },
|
| 114 |
|
| 115 | toggle(dropdown) {
|
| 116 | dropdown = this._elOrId(dropdown);
|
| 117 | if (!dropdown.classList.contains('open')) {
|
| 118 | this.open(dropdown);
|
| 119 | } else {
|
| 120 | this.close(dropdown);
|
| 121 | }
|
| 122 | }
|
| 123 |
|
| 124 | };
|
| 125 |
|
| 126 | [].forEach.call(document.getElementsByClassName('dropdown'), dropdown => {
|
| 127 | Dropdown.init(dropdown);
|
| 128 | });
|