36 lines
1.7 KiB
JavaScript
36 lines
1.7 KiB
JavaScript
Object.defineProperty(exports, '__esModule', { value: true });
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const _optionalChain = require('./_optionalChain.js');
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// https://github.com/alangpierce/sucrase/tree/265887868966917f3b924ce38dfad01fbab1329f
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/**
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* Polyfill for the optional chain operator, `?.`, given previous conversion of the expression into an array of values,
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* descriptors, and functions, in cases where the value of the expression is to be deleted.
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*
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* Adapted from Sucrase (https://github.com/alangpierce/sucrase) See
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* https://github.com/alangpierce/sucrase/blob/265887868966917f3b924ce38dfad01fbab1329f/src/transformers/OptionalChainingNullishTransformer.ts#L15
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*
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* @param ops Array result of expression conversion
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* @returns The return value of the `delete` operator: `true`, unless the deletion target is an own, non-configurable
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* property (one which can't be deleted or turned into an accessor, and whose enumerability can't be changed), in which
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* case `false`.
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*/
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function _optionalChainDelete(ops) {
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const result = _optionalChain._optionalChain(ops) ;
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// If `result` is `null`, it means we didn't get to the end of the chain and so nothing was deleted (in which case,
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// return `true` since that's what `delete` does when it no-ops). If it's non-null, we know the delete happened, in
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// which case we return whatever the `delete` returned, which will be a boolean.
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return result == null ? true : result;
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}
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// Sucrase version:
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// function _optionalChainDelete(ops) {
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// const result = _optionalChain(ops);
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// // by checking for loose equality to `null`, we catch both `null` and `undefined`
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// return result == null ? true : result;
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// }
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exports._optionalChainDelete = _optionalChainDelete;
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//# sourceMappingURL=_optionalChainDelete.js.map
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