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Partial Types (Optionalized Properties for Existing Types) #4889

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RyanCavanaugh
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CommittedThe team has roadmapped this issueSuggestionAn idea for TypeScript
@Gaelan

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@Gaelan
// Given:interfaceFoo{simpleMember:number;optionalMember?:string;objectMember:X;// Where X is a inline object type, interface, or other object-like type}// This:varfoo:partialFoo;// Is equivalent to:varfoo:{simpleMember?:number,optionalMember?:string,objectMember?:X};// And this:varbar:deepPartialFoo;// Is equivalent to:varfoo:{simpleMember?:number,optionalMember?:string,objectMember?:deepPartialX};

Potential Use Cases

  • Mongo Queries (deepPartial)
  • React.setState (partial)

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