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https://ide50-jamesr1.cs50.io and https://ide50-jamesr1.cs50.io:8080 use different ports, and therefore are considered different servers. Instead of $.getJSON("https://ide50-jamesr1.cs50.io/articles? …

As far as I know, it's jsonify(True).

db.execute for a SELECT returns a list of dicts, a dict being some kind of key:value store. Each list entry corresponds to a database record. So len(rows) represents the matching number of records (w …

You could use document.querySelector('input[name="username"]'), or probably document.getElementsByName("username")[0] (getElementsByName returns a NodeList, that's why you need to select an element). …

I don't think the "click" event of the form should be used, but the "submit" event. And I would do the preventDefault and the GET request in one callback function. In theory, you should use "/check?u …

I don't think it's a good idea to add listeners in a callback that way. They can pile up. The empty form does not seem to have one, empty form would submit, and you have no code for removing them late …

/register The error message is because you don't return anything. Maybe return a redirect to / on success. Test the value db.execute returns for the INSERT. That one will tell you whether the INSERT w …

Your second example probably meant to be setTimeout(addMarkerMethod, i * 200); without the pair of parentheses. The event loop will cause your function to be called once it gets enqueued. In that …

Some background, skip if you want: JavaScript can only ever handle one piece of running code at a time. If you did the AJAX request in a synchronous way, waiting for it to complete before you continue …

Your data might be fine, your x is not. You are always returning undefined in your submit event handler, since the AJAX request is A, asynchronous, and your callback is executed long after submit bein …

You can't use the aggregated value in WHERE. WHERE is applied to the table data, and the aggregated values are created later. There is the complementary HAVING clause, processed after aggregation. Us …

The API used in lookup stopped being available anonymously. One can get a personal token, but a person who did reported the free requests are pretty limited. Looks like CS50 staff got a token for us! …

That's happening in the first line of code you showed. The db.execute is missing a named argument, something like db.execute("... WHERE user_id = :user_id", user_id=session["user_id"]) …

Static scripts should be placed in the static directory of your project. Somewhere in the code Flask is told to serve that one just as is, so they can be included like <script src="/static/script.js"> …

Make sure to call the form's submit method, the submit button has no such thing.