gui-dat

is a super-light javascript library for making GUI elements. It is inspired by controlP5.

var controllableObject = 
   {   
	  numberProperty: 20,
	  constrainedNum: 0,
	  notchedNum: 240,
	  textProperty: "a string",
	  anotherTextProperty: "another string",
	  booleanProperty: false,
	  anotherBooleanProperty: false,
	  functionProperty: function() {
		 alert("I am a function!");
	  }
   };

window.onload = function() {

   GUI.start();

   // Creates a number box
   GUI.add(controllableObject, "numberProperty");

   // Creates a slider (min, max)
   GUI.add(controllableObject, "constrainedNum", -100, 100)
   
   // Creates a slider with notches
   GUI.add(controllableObject, "notchedNum", 0, 800, 100)

   // Creates a text field
   GUI.add(controllableObject, "textProperty");

   // Creates a checkbox
   GUI.add(controllableObject, "booleanProperty");

   // Creates a button
   GUI.add(controllableObject, "functionProperty")
      .setName("Fire a Function");

};