html - Creating Dynamic button with click event in JavaScript

Question

How can I create a dynamic button with a click event with JavaScript?

I tried this, but when I click the add button, an alert message show up! It's not what I want - I want to be able to click the button which is dynamically created.

<script language="javascript">
    function add(type) {
        //Create an input type dynamically.   
        var element = document.createElement("input");
        //Assign different attributes to the element. 
        element.setAttribute("type", type);
        element.setAttribute("value", type);
        element.setAttribute("name", type);
        element.setAttribute("onclick", alert("blabla"));

        var foo = document.getElementById("fooBar");
        //Append the element in page (in span).  
        foo.appendChild(element);

    }
</script>

question from:https://stackoverflow.com/questions/7707074/creating-dynamic-button-with-click-event-in-javascript

Answer 1

Wow you're close. Edits in comments:

function add(type) {
  //Create an input type dynamically.   
  var element = document.createElement("input");
  //Assign different attributes to the element. 
  element.type = type;
  element.value = type; // Really? You want the default value to be the type string?
  element.name = type; // And the name too?
  element.onclick = function() { // Note this is a function
    alert("blabla");
  };

  var foo = document.getElementById("fooBar");
  //Append the element in page (in span).  
  foo.appendChild(element);
}
document.getElementById("btnAdd").onclick = function() {
  add("text");
};

<input type="button" id="btnAdd" value="Add Text Field">
<p id="fooBar">Fields:</p>