javascript - What does the "as" keyword do?

Question

if (process.env.NODE_ENV !== 'production') {
    (WithUser as any).displayName = wrapDisplayName(Component, 'withUser');
}

I'm not even sure if as is a keyword, but anyway, what does it do in JavaScript?

question from:https://stackoverflow.com/questions/55781559/what-does-the-as-keyword-do

Answer 1

That is not vanilla JavaScript, it is TypeScript. As any means consider the typed object as a plain untyped JavaScrpt object.

The as keyword is a Type Assertion in TypeScript which tells the compiler to consider the object as another type than the type the compiler infers the object to be.