TypeScript - [string] vs string []

Question

In typescript, what is right?

[string] vs string []

public searchOption: [string] = ['date'];
public searchOption: string[] = ['date'];

Answer 1

The first is tuple , and the second is an array of strings.

You can do this with tuples:

let searchOption: [string, number] = ['date', 22];

Answer 2

If all you are going to do is make an array of strings, they both seem to behave the same. However, the second is the one you should use.

First, so you can make Tuples like this.

let searchOption: [string, number] = ['date', 1];

Answer 3

. , https://www.typescriptlang.org/docs/handbook/basic-types.html