【Vue】this = undefined 可能是箭头函式搞的鬼

箭头函式和普通函式之间的区别

实际 mounted 资料

mounted() {  axios.get('https://')  .then(function(res){     this.spots = res.data;     console.log(this);  // undefined  })}

mounted() {  axios.get('https://')  .then((res) => {      this.spots = res.data;      console.log(this);  // Vue   })}

参考来源：
https://iter01.com/141625.html
https://blog.scottchayaa.com/post/2019/03/09/jquery-closure-function-this/