JavaScript - check if string contains letters

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

Quick solution:

// ONLINE-RUNNER:browser;

const text = '123a';

if (text.match(/[a-zA-Z]/g)) {
	console.log('The string contains letter(s).');
}

Note:

This solution only forks for common, English letters.

Practical example

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

// ONLINE-RUNNER:browser;

const regex = /[a-zA-Z]/g;
const text = '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.

See also

1. JavaScript - check if character is letter with i18n

References

1. String.prototype.match() - JavaScript | MDN