js生成6位随机码

let chars = '0123456789';
/****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
let maxPos = chars.length;
let code = '';
for (let i = 0; i < 6; i++) {
code += chars.charAt(Math.floor(Math.random() * maxPos));
}
return code;      //直接转换为小写