"canvas is not a constructor"

[lakeinchina]

I compile ejecta-v8 as a module of ejecta-v8-sample.when i 'run in Ejecta-v8 View' , it crash.
plasma.js:

	var canvas = require('canvas');
	console.log("canvasA="+canvas);
	var c = new canvas(view);

ag.boersego.bgjs.sample I/BGJSV8Engine-jni: viewCreated called [object Arguments]
ag.boersego.bgjs.sample I/BGJSV8Engine-jni: canvasA=[object HTMLCanvasElement]

beginning of crash
ag.boersego.bgjs.sample E/AndroidRuntime: FATAL EXCEPTION: Thread-4296
Process: ag.boersego.bgjs.sample, PID: 23679
ag.boersego.bgjs.V8Exception: An exception was thrown in JavaScript
at ag.boersego.bgjs.JNIV8Function._callAsV8Function(Native Method)
at ag.boersego.bgjs.JNIV8Function.callAsV8Function(JNIV8Function.java:22)
at ag.boersego.bgjs.sample.DemoEjectaFragment.initializeV8(DemoEjectaFragment.java:76)
at ag.boersego.bgjs.sample.DemoEjectaFragment.access$200(DemoEjectaFragment.java:24)
at ag.boersego.bgjs.sample.DemoEjectaFragment$1$1.onGLCreated(DemoEjectaFragment.java:97)
at ag.boersego.bgjs.V8TextureView$RenderThread.run(V8TextureView.java:743)
Caused by: ag.boersego.bgjs.V8JSException: [TypeError] canvas is not a constructor
at global.startPlasma(js/plasma.js:106)

any help?

[lakeinchina]

well,canvas is a function,so I replaced

var c = new canvas(view);

with

var c = canvas(view);

And it works,but why?

[unverbraucht]

These are two different ways of calling constructors in v8 native-backed functions. I'll look into it, thanks.