18 lines
630 B
JavaScript
18 lines
630 B
JavaScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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export function once(fn) {
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const _this = this;
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let didCall = false;
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let result;
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return function () {
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if (didCall) {
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return result;
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}
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didCall = true;
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result = fn.apply(_this, arguments);
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return result;
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};
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}
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