I'm completely new to all of this but am trying to add some logic into an ajax query from a JSON file to write this to HTML.

I'm reading two variable from a nested JSON file, "departure time" and "expected departure time". I want to write the "expected departure time" into the HTML if the two times differ. But if they are equal instead of the time I want to write "On Time".

For this I need to have some logic inside my query. But I don't know how to do this. 

Below is the code where I have the logic described as:

" if (boardHTML = boardHTML2) then bordHTML3 = "ON TIME" else boardHTML3 = boardHTML"

I know that this is incorrect, but how can I add such a logic to the query? Any advice?

1. $. ajax({

   dataType: "json",

   url: url

   }). done( function( data) {

   console. log( data);

   $( '#ExpectedTime'). html( '<h3></h3>');

   for ( var place of data. departures. all) {

   var boardHTML = '<div class="DBoard">' +

   place. expected_departure_time +

   '</div>';

   
   

   var boardHTML2 = '<div class="DBoard">' +

   place. aimed_departure_time +

   '</div>';

   
   

   if ( boardHTML = boardHTML2) then bordHTML3 = "ON TIME" else boardHTML3 = boardHTML;

   $( '#ExpectedTime'). append( boardHTML3);

   }