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Cómo definir una función con "este" contexto en mecanografiado
type Animal = { name: string } function getBear(this: Animal) : Animal { this.name = "hi" return this } console.log(getBear().name)

¿Alguien podría ayudarme con esto? No puedo llamar a la función getBear.

about 4 years ago · Juan Pablo Isaza
2 answers
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No puede hacer esto porque this contexto de getBear no está vinculado a un Animal cuando lo llama. Simplemente decirle a TypeScript que this es un Animal no es suficiente, también debe llamar a su función con ese contexto.

En este caso tendrías que llamarlo así.

 type Animal = { name: string } function getBear(this: Animal) : Animal { this.name = "hi" return this } console.log(getBear.call({ name: "test" }).name)
about 4 years ago · Juan Pablo Isaza Report

0

Puedes llamarlo de 3 formas:

 type Animal = { name: string } function getBear(this: Animal, a: string): Animal { this.name = a return this } // First one // function.call(objcontext,parameters) calls a function under a different object context. // read more at : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call console.log(getBear.call({ name: "test" }, "Username").name) // Here we create a object //second console.log(new (getBear as any)("Username").name) //third console.log(new (<any>getBear)("Praveen").name)
about 4 years ago · Juan Pablo Isaza Report
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