1 | 'use strict';
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2 |
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3 | exports.__esModule = true;
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4 | exports.removeResizeListener = exports.addResizeListener = undefined;
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5 |
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6 | var _resizeObserverPolyfill = require('resize-observer-polyfill');
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7 |
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8 | var _resizeObserverPolyfill2 = _interopRequireDefault(_resizeObserverPolyfill);
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9 |
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10 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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11 |
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12 | var isServer = typeof window === 'undefined';
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13 |
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14 |
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15 | var resizeHandler = function resizeHandler(entries) {
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16 | for (var _iterator = entries, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
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17 | var _ref;
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18 |
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19 | if (_isArray) {
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20 | if (_i >= _iterator.length) break;
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21 | _ref = _iterator[_i++];
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22 | } else {
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23 | _i = _iterator.next();
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24 | if (_i.done) break;
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25 | _ref = _i.value;
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26 | }
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27 |
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28 | var entry = _ref;
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29 |
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30 | var listeners = entry.target.__resizeListeners__ || [];
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31 | if (listeners.length) {
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32 | listeners.forEach(function (fn) {
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33 | fn();
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34 | });
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35 | }
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36 | }
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37 | };
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38 |
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39 |
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40 | var addResizeListener = exports.addResizeListener = function addResizeListener(element, fn) {
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41 | if (isServer) return;
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42 | if (!element.__resizeListeners__) {
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43 | element.__resizeListeners__ = [];
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44 | element.__ro__ = new _resizeObserverPolyfill2.default(resizeHandler);
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45 | element.__ro__.observe(element);
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46 | }
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47 | element.__resizeListeners__.push(fn);
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48 | };
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49 |
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50 |
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51 | var removeResizeListener = exports.removeResizeListener = function removeResizeListener(element, fn) {
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52 | if (!element || !element.__resizeListeners__) return;
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53 | element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);
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54 | if (!element.__resizeListeners__.length) {
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55 | element.__ro__.disconnect();
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56 | }
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57 | }; |
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