Basic password generator.

generatePassword.js

/**
 * Basic password generator.
 * Alphabet: digits, English letters in both cases, and special characters.
 *
 * @param {number[]} range - list of two numeric values "from" and "to" which are UTF code points
 * @param {number} length - password length, small values aren't recommended for security reasons
 *
 * @return {Generator<string, void, *>}
 */
function* generatePassword ( range = [33, 126], length = 20 ) {
    while ( 1 ) yield String.fromCodePoint(...Array.from({length}, _ => ~~(range[0] + Math.random() * (range[1] - range[0] + 1))));
}