@onesy/utils/esm/randomString.js

Utils

import pick from './pick';
import clamp from './clamp';
import shuffle from './shuffle';

const randomString = function () {
  let length_ = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1e1;
  const length = clamp(length_, 4);
  let result = '';
  const lowercase = 'abcdefghijklmnopqrstuvwxyz';
  const uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  const specials = '!@#$%^&*()_+{}:"<>?\|[];\',./`~';
  const numbers = '0123456789';
  const lowPriorityLength = Math.ceil(length * 0.1);
  result += pick(lowercase, length - lowPriorityLength * 3);
  result += pick(uppercase, lowPriorityLength);
  result += pick(specials, lowPriorityLength);
  result += pick(numbers, lowPriorityLength);
  return shuffle(result);
};

export default randomString;