33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
import { _nullishCoalesce } from './_nullishCoalesce.js';
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// https://github.com/alangpierce/sucrase/tree/265887868966917f3b924ce38dfad01fbab1329f
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/**
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* Polyfill for the nullish coalescing operator (`??`), when used in situations where at least one of the values is the
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* result of an async operation.
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*
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* Note that the RHS is wrapped in a function so that if it's a computed value, that evaluation won't happen unless the
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* LHS evaluates to a nullish value, to mimic the operator's short-circuiting behavior.
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*
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* Adapted from Sucrase (https://github.com/alangpierce/sucrase)
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*
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* @param lhs The value of the expression to the left of the `??`
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* @param rhsFn A function returning the value of the expression to the right of the `??`
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* @returns The LHS value, unless it's `null` or `undefined`, in which case, the RHS value
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*/
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async function _asyncNullishCoalesce(lhs, rhsFn) {
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return _nullishCoalesce(lhs, rhsFn);
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}
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// Sucrase version:
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// async function _asyncNullishCoalesce(lhs, rhsFn) {
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// if (lhs != null) {
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// return lhs;
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// } else {
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// return await rhsFn();
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// }
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// }
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export { _asyncNullishCoalesce };
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//# sourceMappingURL=_asyncNullishCoalesce.js.map
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