Sending values to methods of one class (Javascript):

Calling methods of a class in Javascript

<!-- We can call the function using the onclick function on the html -->
<input type="image" id="sayhi_input" onclick="pop.create('Say hi!')">


<script>
  //Declaration of the Class "Popup"
  function Popup() {
  }
  Popup.prototype = {
      constructor: Popup, //Construct
  
      create: function(param) { //Function create will do one alert
          alert(param);
      }
  };
  var pop = new Popup(); //Creating the variable of the class
  
  //Or we can call the function using a Event Listener function
  document.getElementById("sayhi_input").addEventListener("click", function() {
      pop.create("Say hi!");
  }, false);
</script>