Today, I studied vue+axios for front-end development. When I looked at the axios document, I found that there was a way to get remote pictures in the document. The original text of the document is as follows: 
 / / get remote images 
 axios ({
 method:"get", 
 url:"  http://bit.ly/2mTM3nY",
 responseType:"stream" 
}) 
 .then (function (response) {
 response.data.pipe (fs.createWriteStream ("ada_lovelace.jpg")) 
}); 
I am afraid of adding a picture if the format is out of order:
  
 
so the question is, what exactly are pipe and fs in the code response.data.pipe (fs.createWriteStream ("ada_lovelace.jpg"))? Console printing did not find these two parameters, ask for advice!
