javascript - Drawing a simple circle using Crafty.js and Box2d -

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I'm trying to draw a simple circle by using box2d with crafty.js, but I get it to attract it Jsfiddle may not be able to:

Look at this part of the code: 

  var ball = crafty.e ("2D, canvas, color, box 2D , Ball ") .attr ({X: 10, y: 15, z: 5}). Color ("#FFF") .box2d ({bodyType: 'dynamic', density: 1.0, friction: 2, restoration: 0.2, shape: 'circle'}). OnContact ("Floor", Function (Data) {Warning ("Hi");});   
 The strange thing about this is that  warning  is executed but the ball is not showing up. 
  
  Box2dWeb- 2.1.a.3.js   
  box2d.js   
 Try downloading this source to  crafty.js   <
, and try  
 and see if it works for you.  P> 
 OK, I'm working on your code, it seems that reference library clever + box 2D is a modem created by a user who has created a pong game.  
 You can add width to  ball object in .attr w  and height  h  attribute.  
  var ball = crafty.e ("2D, canvas, color, box 2D," ball ") .attr ({x: 10, y: 15, z: 5, w ("Body": "dynamic", density: 1.0, friction: 2, retribution: 0.2, shape: 'circle'}). Contact ("bottom" ", Function (data) {alerts (" hi ");});   
 If you want the circle box box to be outlined on , color  Delete in the string logic of  crafty.e  and delete the .color property  
  var ball = crafty.e ("2D, canvas, ball, box 2D, ") .attr ({x: 10, y: 15, z: 5 OnContact (" floor ", function (data). (2: 2, retror Ning: 0.2, shape: 'circle'}) .box2d ({bodyType: 'dynamic', density: 1.0, friction: {warning ("hi");});   
 That it helps :)

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