微信小程序生成随机数

const charts = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
const random = function generateMixed(n){
var res = '';
for(var i = 0; i <n; i++){
var id = Math.ceil(Math.random()*35);
res += charts[id];
}
return res;
}
export = {random}