TypeScript - check if string contains letters

In this article, we would like to show you how to check if string contains letters in TypeScript.

Quick solution:

xxxxxxxxxx

const text: string = '123a';

​

if (text.match(/[a-zA-Z]/g)) {

  console.log('The string contains letter(s).');

}

Note:

This solution only forks for common, English letters.

In this example, we use match() method to check if the text string contains any letters.

xxxxxxxxxx

const regex: RegExp = /[a-zA-Z]/g;

const text: string = '12abc34';

​

if (text.match(regex)) {

  console.log('The string contains letter(s).');

}

Note:

The match() method used with /g flag returns all results matching the complete regular expression (regex). If nothing matches returns null.

1. JavaScript - check if string contains letters