Question from the Javascript test

I check that the domain queried is in HTTPS.

I make sure that the interrogated server allows external AJAX calls.

To avoid unpleasant surprises, I decide to use the JSONP format.

I check in the documentation if the server requires token authentication.

I should imperatively make an asynchronous call so as not to block the server.

I make sure I loaded jQuery or jqLite on my page.