Edit File: _nullishCoalesce.js
// https://github.com/alangpierce/sucrase/tree/265887868966917f3b924ce38dfad01fbab1329f // // The MIT License (MIT) // // Copyright (c) 2012-2018 various contributors (see AUTHORS) // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in all // copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. /** * Polyfill for the nullish coalescing operator (`??`). * * Note that the RHS is wrapped in a function so that if it's a computed value, that evaluation won't happen unless the * LHS evaluates to a nullish value, to mimic the operator's short-circuiting behavior. * * Adapted from Sucrase (https://github.com/alangpierce/sucrase) * * @param lhs The value of the expression to the left of the `??` * @param rhsFn A function returning the value of the expression to the right of the `??` * @returns The LHS value, unless it's `null` or `undefined`, in which case, the RHS value */ function _nullishCoalesce(lhs, rhsFn) { // by checking for loose equality to `null`, we catch both `null` and `undefined` return lhs != null ? lhs : rhsFn(); } // Sucrase version: // function _nullishCoalesce(lhs, rhsFn) { // if (lhs != null) { // return lhs; // } else { // return rhsFn(); // } // } export { _nullishCoalesce }; //# sourceMappingURL=_nullishCoalesce.js.map
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