Login to using callback

This is an example of using DataConnect with callbacks. Callbacks are function the is defined in a specified format. The function gotdata(jdata) is such a function. It has one parameter jdata and this is a javascript object with the structure returned from the server in a the jdata.data object. The jdata.result should have the string value 'ok' if all went well and error or failed if not. If you have error as a result, you will also have the value errorcode and error telling you what went wrong.

...
<pre id="returndata" style="background-color: antiquewhite;"></pre>
...
<script src="https://global.assets/js/2imply.js"</script>
<script>
let dataconnect = new DataConnect("data"); // set up connection to the default data object
function gotdata(jdata){
  if ('cmd' in jdata && jdata.cmd == 'login' && 'data' in jdata){
    if (jdata.data.isloggedin){
      isloggedin = true;
      $("#message").html("Logged in");
      const thelogindialog = document.getElementById('logindialog');
      const logindialog = bootstrap.Modal.getInstance(thelogindialog);
      logindialog.hide();
    } else {
      $("#loginmsg").html("Wrong user name or password, try again.");
    }
  } else
    $("#loginmsg").html("no result from server, try again.");
  $("#returndata").html(JSON.stringify(jdata, null, 2));
}
function dologin(){
  let un = $("#username").val();
  let pw = $("#password").val();
  dataconnect.login(un,pw,gotdata);
}
function dogetdata(){
  dataconnect.getrecord("Address",'Name="U*"',0);
}
</script>

As you can see a lot easier than doing this manually. Both dologin and dogetdata will display the resulting json coming back from the server in a pre with id returndata. The dologin will take user name and password from the html fields.