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>
console
function tt() {
  const t = ` {
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    "data": {
      "active_time": "2020-08-28 21:38:11",
      "areaid": 0,
      "children": [{
        "attendance_type": 1,
        "avatar": "",
        "birthday": "2017-06-13",
        "call": "妈妈",
        "child_id": 231152048,
        "class_id": 210349961,
        "class_name": "小二班",
        "class_pic": "",
        "is_graduation": 0,
        "is_invite": false,
        "is_member": 0,
        "is_vip": false,
        "jump2page": 0,
        "member_end_date": "1970-01-01",
        "name": "王艺昕宝宝",
        "school_app_type": 0,
        "school_id": 202088080,
        "school_name": "洋洋幼儿园",
        "sex": 2,
        "style": 1,
        "subtype": 5,
        "user_type": 1
      },
      {
        "attendance_type": 1,
        "avatar": "",
        "birthday": "2015-12-12",
        "call": "妈妈",
        "child_id": 231193847,
        "class_id": 207189447,
        "class_name": "中四班",
        "class_pic": "/public/setup/icon_circle_portrait3@3x.png",
        "is_graduation": 0,
        "is_invite": false,
        "is_member": 0,
        "is_vip": false,
        "jump2page": 0,
        "member_end_date": "1970-01-01",
        "name": "王艺博",
        "school_app_type": 0,
        "school_id": 202088080,
        "school_name": "洋洋幼儿园",
        "sex": 1,
        "style": 1,
        "subtype": 5,
        "user_type": 1
      }],
      "cityid": 0,
      "enabled": 1,
      "first_login_time": "2020-08-28 21:38:11",
      "flower": 0,
      "hasRelativeInvite": false,
      "hasSchoolInvite": false,
      "invite_code": "",
      "isCreateUser": false,
      "is_active": true,
      "is_give": 0,
      "is_invite": false,
      "kid": "",
      "last_login_time": "2020-10-23 16:39:25",
      "latitude": "",
      "loginType": 0,
      "longitude": "",
      "mobile": "17709167363",
      "name": "王艺昕宝宝",
      "nickname": "▍"最熟悉的陌生人ヾ",
        "origin ":"weixinzc ",
        "parent_avatar ":"http: //filesystem1.hybbtree.com/2020/8/28/14754c7a-ade1-4191-92f9-47cc640a7399",
      "parent_sex": 2,
      "provinceid": 0,
      "realname": "余春艳",
      "register_time": "2020-08-28 21:37:59",
      "score": 0,
      "signature": "",
      "stages": 4,
      "status": 2,
      "token_id": "gMaph2SJ7fQIgu0l4_0vXIGAF9Bvmdpz",
      "type": 1,
      "uid": 1299340452365316096,
      "user_id": 238704515,
      "user_wall": "",
      "username": "17709167363"
    },
    "msg": "请求成功!"
  }`;
  console.log(
    JSON.parse(decodeURIComponent(encodeURIComponent(t)))
  );
}
<html>
  
  <body>
    <button onclick="tt()">
      ddd
    </button>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/json3/3.3.2/json3.min.js">
    </script>
  </body>

</html>