generate random string

random-string.js

/** printable ASCII characters */
const ascii = [];
for (let i = 33; i <= 126; ascii.push(String.fromCharCode(i++)));

/** generate random string */
const randomString = limit => {
  const result = [];
  
  for (let i = 0; i < limit; i++) {
    const index = Math.floor(Math.random() * (126 - 33) + 33);
    result.push(ascii[index]);
  }
  
  return result.join("");
};

// example usage
randomString(8);   // 8 characters
randomString(16);  // 16 characters
randomString(32);  // 32 characters
randomString(64);  // 64 characters