All the code we've seen so far was based on the automatic type conversion that happens inside the dart:js library. This conversion always happens in both directions. Once you know how this happens, you will have a better understanding of the limits of that solution and it will help you avoid mistakes.

var v_null = null;
var v_bool = true;
var v_num = 1.2;
var v_str = "Hello";
var v_date = new Date();
var v_blob = new Blob(
  ['<a id="a"><b id="b">hey!</b></a>'],
  {type : 'text/html'});
var v_evt = new Event('click');
var v_nodes = document...