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Date: Sun, 12 Jun 2022 19:46:30 +0700
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To: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>,
 Fernanda Ma'rouf <fernandafmr2@gmail.com>,
 Akiekano <hello.akiekano@gmail.com>
Cc: GNU/Weeb Mailing List <gwml@vger.gnuweeb.org>,
 Ammar Alifian Fahdan <kerupuksambel.2000@gmail.com>,
 Irvan Malik Azantha <irvanmalik48@gmail.com>, Khoiri <qq.khoiri@gmail.com>,
 Muhammad Irvan Hakim <irvanhakim.dev@gmail.com>
References: <CAOG64qP3rjgbr2h0J9UdWEHE0-oc7XSn_av1JNMQAW=cA-e5Vw@mail.gmail.com>
 <20220612120720.2750101-8-alviro.iskandar@gnuweeb.org>
From: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Subject: Re: [PATCH buubuu v1 08/10] view: Put the style and JS preload script
 to top
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On 6/12/22 7:07 PM, Alviro Iskandar Setiawan wrote:
> +    let xhr = new XMLHttpRequest();
> +    xhr.open("POST", "/auth/register");
> +    xhr.setRequestHeader("Content-type", "application/json");
> +    xhr.send(JSON.stringify(json));

What is the outcome of this code?

 From what I see, what you do are:
1. You create an XHR instance.
2. Open an HTTP POST to "/auth/register".
3. Set the content type to "application/json".
4. Send the stringified JSON.

After that, it does nothing. How do you handle the response from the
server?

This definitely needs a callback to actually work. For example,
setting the onload property like this can do:

   xhr.onload = function () {
      let res = this.responseText;
      // do whatever with res
   };

Or you might as well handle non-successful response with
onreadystatechange like this:

   xhr.onreadystatechange = function () {

      if (this.readyState != 4)
        return;

      let res = this.responseText;
      // do whatever with res
   };

Without such a callback, this only partially works. The client side
will see nothing.

-- 
Ammar Faizi