ttyS0

const API_SYNC_OPENID = 'https://yourapi.example.com/sync_openid';
const ACTIVE_SIGN = 'https://v18.teachermate.cn/wechat-api/v1/class-attendance/active_signs';
const success =  window.location.search.match(/success=([^&]*)/)[1] == '1';
const openId =  window.location.search.match(/openid=([^&]*)/)[1];

setTimeout(() => {
    fetch(API_SYNC_OPENID, {
        method: 'POST',
        headers,
        body: JSON.stringify({ openid: openId })