How to get value from promise synchronously?

Question

Angular

You need to write a method that would return the state of the element true/false

IsValid():boolean {
        return element(by.id(this.id)).isDisplayed();
}

isDisplayed returns a promise on how to get a value from it and return it to IsValid.
Simply put, how to make asynchronous synchronous?
Do not offer alternative solutions, that's how it should be.

Answer 1

how to make asynchronous synchronous?

No way. You can use async/await if the promises seem verbose, but that will only change the syntax, not the point.
Anything further down the stack from an async function must be async, even if you really, really want it to be otherwise.