Use AJAX with a Node.Js app on Heroku

Hi ! I'm new to Construct. I'am a Web develloper and I want to fetch some data from an API.

I created a simple node.js API connect with a Firebase realtime database.

I use Heroku to store my code (simple and free) and you can check my result here : https://construct-test.herokuapp.com/

But for now I can't get this data. I tried with a fake API (https://jsonplaceholder.typicode.com/posts/6) and it's work.. But not with mine.

I work with postman and I get my data with my link.

If you have any idea.. I take it ! Thank you all

Here is my Construct work :

And here my Node.js API :

the error I got trying it out is:

Access to XMLHttpRequest at 'https://construct-test.herokuapp.com/' from origin 'https://preview.construct.net' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

so you must allow cross domain calls on the server...

Oh, I try this. Let me change some lines !

How can you see the error ? With your Construct app ?

Oh, I try this. Let me change some lines !

How can you see the error ? With your Construct app ?

Thank you, it's working. Simple !

If you can juste explain me how you get the error that would be cool ! :)

when you run your project, if you press the F12 function key it calls up the Console / developer tools... shows lots of valuable details.

Oh yes, I know this tool for my job.. But I didn't think to use it with Construct..

Thank you again :)