48 lines
1.8 KiB
JavaScript
48 lines
1.8 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = useThenable;
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var React = _interopRequireWildcard(require("react"));
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (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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function useThenable(create) {
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const [promise] = React.useState(create);
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let initialState = [false, undefined]; // Check if our thenable is synchronous
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promise.then(result => {
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initialState = [true, result];
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});
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const [state, setState] = React.useState(initialState);
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const [resolved] = state;
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React.useEffect(() => {
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let cancelled = false;
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const resolve = async () => {
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let result;
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try {
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result = await promise;
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} finally {
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if (!cancelled) {
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setState([true, result]);
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}
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}
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};
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if (!resolved) {
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resolve();
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}
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return () => {
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cancelled = true;
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};
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}, [promise, resolved]);
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return state;
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}
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//# sourceMappingURL=useThenable.js.map
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