How to check if a string contains only ascii characters in JavaScript

In this Article we will go through how to check if a string contains only ascii characters only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const isAscii = str => /^[\x00-\x7F]+$/.test(str);
\n