1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = useThenable;
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7 | var React = _interopRequireWildcard(require("react"));
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8 | function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
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9 | function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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10 | function useThenable(create) {
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11 | const [promise] = React.useState(create);
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12 | let initialState = [false, undefined];
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13 |
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14 |
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15 | promise.then(result => {
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16 | initialState = [true, result];
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17 | });
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18 | const [state, setState] = React.useState(initialState);
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19 | const [resolved] = state;
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20 | React.useEffect(() => {
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21 | let cancelled = false;
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22 | const resolve = async () => {
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23 | let result;
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24 | try {
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25 | result = await promise;
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26 | } finally {
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27 | if (!cancelled) {
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28 | setState([true, result]);
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29 | }
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30 | }
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31 | };
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32 | if (!resolved) {
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33 | resolve();
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34 | }
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35 | return () => {
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36 | cancelled = true;
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37 | };
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38 | }, [promise, resolved]);
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39 | return state;
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40 | }
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41 |
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