Generate a random string from given characters

JavaScript

const generateString = (length, chars) =>
  Array(length)
    .fill('')
    .map((v) => chars[Math.floor(Math.random() * chars.length)])
    .join('')

Examples

generateString(10, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ')