AugustoM's questions

Following a Vue tutorial , in which fetchan API that returns an image of cats is made, I suddenly came to a curious situation.

new Vue({
  el: '#app',
  data: {   
    catSrc: null,
  },

...

this.catSrc = null;
let res = fetch("https://api.thecatapi.com/v1/images/search",{
    method: "GET",
    headers: {
      "x-api-key": API_KEY,
      "Accept":"application/json",
      },
    })
    .then(function(response) {
      return response.json();
    })
    .then(function(data){
      return data[0].url;
   });
      
 let getImg = () => {
   res.then((result) => {
   this.catSrc = result;
   });
 };

getImg();

The above does and I manage to return the value of the promise to the Vuefetch dynamic variable , but since I first thought of "converting" the arrow function, the alternative never returned the value that the arrow function does return.

Can someone explain to me why of this?

The "normal" function I tried to use was:

let getImg = function () {
  res.then(function (result) {
    this.catSrc = result;
  });
};

getImg();

I am implementing the Facebook login to a web app and I need to retrieve the email to add it to the app registration, but the Facebook api only returns the id and the name, check the permissions and the email should be added, in the documentation it is declares that a revision is not necessary to have it enabled, but I cannot get the dialog box to announce that the email will be required and neither can I capture it, in the debug tools I manage to add it and then recover it, but it could not be doing that to each user to be validated, any idea what would be wrong? Lei y lei, and the app must be published to capture data, and it already is, in the app configuration, the email permission is validated (in green) as well as the facebook profile (required)

Thank you for your attention,