CODEWITHSUNDEEP
angulartypescript
Henjun Soram
Henjun Soram

Reputation: 33

TypeScript. what does it mean :(<any>(() => true))

I am new to TypeScript. Currently I am trying to understand some code related to testing and I came across this code,

instance.nav.setRoot = (<any>(() => true));

What is the meaning of the outermost parentheses? What is the result of this assignment?

Upvotes: 1

Views: 113

Answers (2)

Syam
Syam

Reputation: 1621

()=> true is a short function form for regular function. <any> is type casting, which tells typescript that the function can be any type and just ignore type errors. Outer most parentheses just scopes the whole expression for typecasting. The end result in javascript is as follows

instance.nav.setRoot =  function(){
   return true;
}

Upvotes: 1

francium
francium

Reputation: 2480

The <any> a type casting. It's making the compiler treat () => true as type any.

Upvotes: 0

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