I am only starting to use kineticJS but I am getting some errors after

Question

Editorial Team

Asked: June 10, 20262026-06-10T09:00:36+00:00 2026-06-10T09:00:36+00:00

I am only starting to use kineticJS but I am getting some errors after following
This tutorial

I don’t understand why but I am getting an exception from inside the KineticJS file:

"Uncaught TypeError: cannot call method 'appendChild' of undefined".

When I do a step by step alert()s, I see that it stops after

var stage = new Kinetic.Stage(“rightSide”, 578, 200);

but I most definitively have:

<canvas id="rightSide">
</canvas>

I also tried:

<div id="rightSide">
</div>

and I am getting the same error.

Thanks.

Edit:
in response to the comments below, this is Copy-Paste from the tutorial:

</head>
<body>
<div id="container">
</div>
</body>

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Editorial Team · Answer 1 · 2026-06-10T09:00:38+00:00

Thus @Gleeb ‘s own answer reflects current practice in KineticJS v4.0.x instead of those docs / tutorials made in the early v3 era.

Should make a pull request for backward compatibility.. something like

if(arguments.length>1){
 config.container =  arguments[0];
 config.width = arguments[1];
 config.height = arguments[2];
}

… in the Stage constructor.

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