初学者，环境 vue.js  typescript
用axios 获取webapi数据可以正常打印，
但赋值给property 就报错：
Unable to set property 'msg' of undefined or null reference

实在不理解哪里出了问题，网上下载的demo也是这么写的啊

<script>
  import axios from "axios";
  export default {
    name: 'hello',
    data() {
      return {
        msg: 'Welcome to Your Vue.js App'
      }
    },
    created() {
      var instance = axios.create({
        baseURL: 'http://localhost:50946/api/'
      });

      instance.get('/values').then(function (respone) {
        console.log(respone.data);
        this.msg = respone.data;
      })
        .catch(function (error) {
          console.log(error);
        });
    }
  }
</script>
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