Array with only specfic values in Typescript

Question

I want to have an array which can contain only specific value

for example socialService would be an array which can only contain value such as facebook, twitter, github, linkedin and few more.

The goal is to only initialise service which are passed in the array.

In typescript how Can I specify an array which can only have certain values?

Noah Stahl · Accepted Answer · 2020-08-13 00:36:38Z

2

You can achieve this using a string literal type. Example:

type SocialService = "facebook" | "twitter" | "github";
const arr: SocialService[] = [];
arr.push("github"); // Yay
arr.push("foo"); // Error

answered Aug 13, 2020 at 0:36

Noah Stahl

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