1 | import _setImmediate from "babel-runtime/core-js/set-immediate";
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2 | import _WeakMap from "babel-runtime/core-js/weak-map";
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19 |
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20 | var readyMap = void 0,
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21 | queueMap = void 0;
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22 |
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23 | function isContentReady(element) {
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24 | if (element.childNodes.length > 0) {
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25 | setContentReady(element);
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26 | }
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27 | return readyMap.has(element);
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28 | }
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29 |
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30 | function setContentReady(element) {
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31 | readyMap.set(element, true);
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32 | }
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33 |
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34 | function addCallback(element, fn) {
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35 | if (!queueMap.has(element)) {
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36 | queueMap.set(element, []);
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37 | }
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38 | queueMap.get(element).push(fn);
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39 | }
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40 |
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41 | function consumeQueue(element) {
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42 | var callbacks = queueMap.get(element, []) || [];
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43 | queueMap.delete(element);
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44 | callbacks.forEach(function (callback) {
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45 | return callback();
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46 | });
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47 | }
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48 |
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49 | export default function contentReady(element) {
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50 | var fn = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function () {};
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51 |
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52 | if (readyMap === undefined) {
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53 | readyMap = new _WeakMap();
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54 | queueMap = new _WeakMap();
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55 | }
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56 |
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57 | addCallback(element, fn);
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58 |
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59 | if (isContentReady(element)) {
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60 | consumeQueue(element);
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61 | return;
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62 | }
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63 |
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64 | var observer = new MutationObserver(function (changes) {
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65 | setContentReady(element);
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66 | consumeQueue(element);
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67 | });
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68 | observer.observe(element, { childList: true, characterData: true });
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69 |
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70 |
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71 | _setImmediate(function () {
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72 | setContentReady(element);
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73 | consumeQueue(element);
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74 | });
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75 | } |
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