text: var vm = new Vue({
      el: '#app',
      data: {
          // host:host,
          host,
          error_name: false,
          error_password: false,
          error_check_password: false,
          error_phone: false,
          error_allow: false,
          error_sms_code: false,
          sending_flag: false,
  
          username: '',
          password: '',
          password2: '',
          mobile: '',
          sms_code: '',
          allow: false,
          sms_code_tip: '获取短信验证码',  // a标签文字
          error_sms_code_message: '',  // 验证码错误提示信息
          error_name_message: '',
          error_phone_message: '',
  
      },
      methods: {
          // 检查用户名
          check_username: function () {
              var len = this.username.length;
              if (len < 5 || len > 20) {
                  this.error_name_message = '请输入5-20个字符的用户名';
                  this.error_name = true;
              } else {
                  this.error_name = false;
              }
              // 检查重名
              if (this.error_name == false) {
                  axios.get(this.host + '/usernames/' + this.username + '/count/', {
                      responseType: 'json'
                  })
                      .then(response => {
                          if (response.data.count > 0) {
                              this.error_name_message = '用户名已存在';
                              this.error_name = true;
                          } else {
                              this.error_name = false;
                          }
                      })
                      .catch(error => {
                          console.log(error.response.data);
                      })
              }
          },
          check_pwd: function () {
              var len = this.password.length;
              if (len < 8 || len > 20) {
                  this.error_password = true;
              } else {
                  this.error_password = false;
              }
          },
          check_cpwd: function () {
              if (this.password != this.password2) {
                  this.error_check_password = true;
              } else {
                  this.error_check_password = false;
              }
          },
          // 检查手机号
          check_phone: function () {
              var re = /^1[3-9]\d{9}$/;
              if (re.test(this.mobile)) {
                  this.error_phone = false;
              } else {
                  this.error_phone_message = '您输入的手机号格式不正确';
                  this.error_phone = true;
              }
              if (this.error_phone == false) {
                  axios.get(this.host + '/mobiles/' + this.mobile + '/count/', {
                      responseType: 'json'
                  })
                      .then(response => {
                          if (response.data.count > 0) {
                              this.error_phone_message = '手机号已存在';
                              this.error_phone = true;
                          } else {
                              this.error_phone = false;
                          }
                      })
                      .catch(error => {
                          console.log(error.response.data);
                      })
              }
          },
          check_sms_code: function () {
              if (!this.sms_code) {
                  this.error_sms_code = true;
              } else {
                  this.error_sms_code = false;
              }
          },
          check_allow: function () {
              if (!this.allow) {
                  this.error_allow = true;
              } else {
                  this.error_allow = false;
              }
          },
  
          // 发送短信验证码
          send_sms_code: function () {
              if (this.sending_flag == true) {
                  return;
              }
              this.sending_flag = true;
  
              // 校验参数，保证输入框有数据填写
              this.check_phone();
  
              if (this.error_phone == true) {
                  this.sending_flag = false;
                  return;
              }
  
              // 向后端接口发送请求，让后端发送短信验证码
              // axios.get('http://127.0.0.1:8000' + '/sms_codes/' + this.mobile + '/', {
              // axios.get('http://api.meiduo.site:8000' + '/sms_codes/' + this.mobile + '/', {
              axios.get(this.host + '/sms_codes/' + this.mobile + '/', {
                  responseType: 'json'
              })
                  .then(response => {
                      // 表示后端发送短信成功
                      // 倒计时60秒，60秒后允许用户再次点击发送短信验证码的按钮
                      var num = 60;
                      // 设置一个计时器
                      var t = setInterval(() => {
                          if (num == 1) {
                              // 如果计时器到最后, 清除计时器对象
                              clearInterval(t);
                              // 将点击获取验证码的按钮展示的文本回复成原始文本
                              this.sms_code_tip = '获取短信验证码';
                              // 将点击按钮的onclick事件函数恢复回去
                              this.sending_flag = false;
                          } else {
                              num -= 1;
                              // 展示倒计时信息
                              this.sms_code_tip = num + '秒';
                          }
                      }, 1000, 60)
                  })
                  .catch(error => {
                      if (error.response.status == 400) {
                          // 展示发送短信错误提示
                          this.error_sms_code = true;
                          this.error_sms_code_message = error.response.data.message;
                      } else {
                          console.log(error.response.data);
                      }
                      this.sending_flag = false;
                  })
          },
  // 注册
          on_submit: function () {
              this.check_username();
              this.check_pwd();
              this.check_cpwd();
              this.check_phone();
              this.check_sms_code();
              this.check_allow();
  
              if (this.error_name == false && this.error_password == false && this.error_check_password == false
                  && this.error_phone == false && this.error_sms_code == false && this.error_allow == false) {
                  axios.post(this.host + '/users/', {
                      username: this.username,
                      password: this.password,
                      password2: this.password2,
                      mobile: this.mobile,
                      sms_code: this.sms_code,
                      allow: this.allow.toString()
                  }, {
                      responseType: 'json'
                  })
                      .then(response => {
                          // 记录用户的登录状态
                          sessionStorage.clear();
                          localStorage.clear();
                          localStorage.token = response.data.token;
                          localStorage.username = response.data.username;
                          localStorage.user_id = response.data.id;
                          location.href = '/index.html';
  
                      })
                      .catch(error => {
                          if (error.response.status == 400) {
                              if ('non_field_errors' in error.response.data) {
                                  this.error_sms_code_message = error.response.data.non_field_errors[0];
                              } else {
                                  this.error_sms_code_message = '数据有误';
                              }
                              this.error_sms_code = true;
                          } else {
                              console.log(error.response.data);
                          }
                      })
              }
          }
      }
  });
  