如何在axios外部获取数据

Question

如何使用axios获取来自api的数据。我需要将datas变量传递给doc.autoTable函数。我没有从axios调用获取数据。我需要使用api数据生成pdf。

   exportpdf(){
     var self = this;
    axios.get("http://34.67.88.0:3000/api/env/fdsfsdf")
    .then(function(res){
      self.datas = res.data[0];

    })

 let columns = [
          {title:"Time",dataKey:"time"},
          {title:"Temperature",dataKey:"Temperature"},
          {title:"Humidity",dataKey:"Humidity"}
          ];
          var doc = new jsPDF('p','pt');
          doc.autoTable(columns,self.datas);
          doc.save("p.pdf");

    } 


     below is my api data 

     [
    {
      "Humidity": "70.50", 
      "Temperature": "25.50", 
      "time": "2019-08-28T10:04:22.597533952Z"
    }, 
    {
      "Humidity": "70.50", 
      "Temperature": "25.40", 
      "time": "2019-08-28T10:09:23.709048064Z"
    }, 
    {
      "Humidity": "70.50", 
      "Temperature": "25.40", 
      "time": "2019-08-28T10:14:25.430288128Z"
    }
    ]