Generate random string/characters in JavaScript (from Stack Overflow)

randomString.js

//https://stackoverflow.com/questions/1349404/generate-random-string-characters-in-javascript
(length => {
    let text = '';
    const POSSIBLE_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
        POSSIBLE_SCOPE = POSSIBLE_CHARS.length;

    for (let i = 0; i < length; i += 1) {
        text += POSSIBLE_CHARS.charAt(Math.floor(Math.random() * POSSIBLE_SCOPE));
    }

    return text;
})(10);