function logItType(output) {
    console.log(typeof output, ";", output);
}
console.log("Looking at dynamic nature of types in JavaScript")
logItType("hello"); // String
logItType(2020);    // Number
logItType([1, 2, 3]);  // Object is generic for this Array, which similar to Python List

Looking at dynamic nature of types in JavaScript
string ; hello
number ; 2020
object ; [ 1, 2, 3 ]

$$.async();

console.log("Hello, World!");

var action = {
    $$: $$,
    console: console,
};

setTimeout(function() {
    $$.clear(0);    // clear output cell
    action.$$.sendResult("Goodbye!");
}, 2000);  // 2 second timer

'Goodbye!'

Person.prototype._toHtml = function _toHtml() {
  var style = (
      "display:inline-block;" +
      "padding:0.25em;" +
      "background:#ccc;" +
      "border: 1px solid #888;" +
      "border-radius:0.25em;" +
      "box-shadow: 0.8em 0.4em 0.4em black;"
  );
  return (
      "<div style='" + style + "'>" +
      this.inspect() +
      "</div>"
  );
};

peter;