Sometimes, we want to check if character is a letter in JavaScript.

In this article, we’ll look at how to check if character is a letter in JavaScript.

How to check if character is a letter in JavaScript?

To check if character is a letter in JavaScript, we can use a regex.

For instance, we write

const isLetter = (str) => {
  return str.length === 1 && str.match(/[a-z]/i);
};

to create the isLetter function that checks if the str string’s length is 1 and that str matches the /[a-z]/i regex.

[a-z] is the pattern for letters.

And i specifies that we search for matches in a case-insensitive manner.

Conclusion

To check if character is a letter in JavaScript, we can use a regex.