生成指定位数的随机数

randomStr.js

/**
 * 生成指定位数的随机数
 * @param {number} x
 */
export const randomStr = (x) => {
  let s = "";
  while(s.length < x && x > 0){
    let v = Math.random() < 0.5 ? 32 : 0;
    s += String.fromCharCode(Math.round(Math.random() * ((122 - v) - (97 - v)) + (97 - v)));
  }
  return s;
}