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getOwnPropertyDescriptor return should allow undefined

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getOwnPropertyDescriptor _should_ return undefined in certain situations. This is documented here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/getOwnPropertyDescriptor

This change addresses https://github.com/Microsoft/TypeScript/issues/14923 and https://github.com/Microsoft/TypeScript/issues/10904. The original fix to 14923 was to the /lib/lib.es2015.proxy.d.ts file instead of /src/lib/lib.es2015.proxy.d.ts (see: https://github.com/Microsoft/TypeScript/pull/10550/commits). I think this meant that the change got over-written by a generation script (see note here: https://github.com/Microsoft/TypeScript/tree/master/lib)
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Andrew Stegmaier 2017-05-08 23:56:29 -07:00 committed by GitHub
parent 9a62db2b5c
commit ccec13aaf1
1 changed files with 1 additions and 1 deletions
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2
src/lib/es2015.proxy.d.ts vendored
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@ -3,7 +3,7 @@ interface ProxyHandler<T> {
setPrototypeOf? (target: T, v: any): boolean;
isExtensible? (target: T): boolean;
preventExtensions? (target: T): boolean;
getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor;
getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor | undefined;
has? (target: T, p: PropertyKey): boolean;
get? (target: T, p: PropertyKey, receiver: any): any;
set? (target: T, p: PropertyKey, value: any, receiver: any): boolean;