How to define an array of strings in TypeScript interface?

I have an object like this:

{ "address": ["line1", "line2", "line3"] }

How to define address in an interface? the number of elements in the array is not fixed.

5 Answers

interface Addressable { address: string[]; }

An array is a special type of data type which can store multiple values of different data types sequentially using a special syntax.

TypeScript supports arrays, similar to JavaScript. There are two ways to declare an array:

Using square brackets. This method is similar to how you would declare arrays in JavaScript.

let fruits: string[] = ['Apple', 'Orange', 'Banana'];

let fruits: Array<string> = ['Apple', 'Orange', 'Banana'];

Both methods produce the same output.

Of course, you can always initialize an array like shown below, but you will not get the advantage of TypeScript's type system.

let arr = [1, 3, 'Apple', 'Orange', 'Banana', true, false];

It's simple as this:

address: string[]

Or:

{ address: Array<string> }

I think the best way to do it is something like: type yourtype = { [key: string]: string[] }