javascript - How to start with fabric.js -

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i beginner study js. encounter issue start fabric.js needs help.

<!doctype html> <html> <head>     <title>fabric_test</title>     <script type="text/javascript" src="all.js"></script> </head> <body>     <canvas id="canvas" width="512" height="512" style="background-color: rgb(222, 222, 222)">         browser not support canvas tag!     </canvas>     <script type="text/javascript">         var canvas = new fabric.canvas('canvas');         // create rectangle object         var rect = new fabric.rect({           left: 100,           top: 100,           fill: 'red',           width: 20,           height: 20         });          // "add" rectangle onto canvas         canvas.add(rect);      </script> </body> </html>

my question is:

  1. why rectangle doesn't draw on canvas when open saved html file?
  2. the fabric download folder contains several folders , files. copy all.js file on current location. right?

this problem caused because put background in canvas object. so, color on inside elements. remove background style canvas.


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