this.code='';
// 可用字符库
const chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
//const chars = '0123456789abcdefghijklmnopqrstuvwxyz';
let code = '';
// 循环生成6位
for (let i = 0; i < 6; i++) {
// 随机取一个字符
const randomIndex = Math.floor(Math.random() * chars.length);
code += chars[randomIndex];
}
this.code=code;