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Request: Class Decorator Mutation · Issue #4881 · microsoft/TypeScript · GitHub
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Needs ProposalThis issue needs a plan that clarifies the finer details of how it could be implemented.This issue needs a plan that clarifies the finer details of how it could be implemented.SuggestionAn idea for TypeScriptAn idea for TypeScript
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If we can get this to type check properly, we would have perfect support for boilerplate-free mixins:
declare function Blah<T>(target: T): T & {foo: number}
@Blah
class Foo {
bar() {
return this.foo; // Property 'foo' does not exist on type 'Foo'
}
}
new Foo().foo; // Property 'foo' does not exist on type 'Foo'nevir, frankwallis, dsherret, patrick-rodgers, RichiCoder1 and 1117 moreericmorandExifers, suhailmalik07 and imaliourisxe4me, Artazor, IonelLupu, kevupton, maulerjan and 27 morebermanboris, clitetailor, kevupton, melroy89, Asing1001 and 7 moreluketanner, smqz, asosnovsky, NullVoxPopuli, incetarik and 134 morekevupton, noramass, LM-G, brandonseydel, l0ll098 and 48 morezhaochy1990, kevupton, brandonseydel, zakharov-dy, l0ll098 and 46 more
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