js-interop: Passing javascript object from dart

Question

I'm struggling to port javascript to dart..

My problem is how to create javascript object. original javascript code is

  function Beagle() {
    this.argv_ = null;
    this.io = null;
  };
  Beagle.prototype.run = function() {
    this.io = this.argv_.io.push();
  };

Now I have Beagle object. and it should be context['Beagle'] maybe?

how can I create javascript obejct?? and with prototype?

Justin Fagnani · Accepted Answer · 2014-03-21 19:18:38Z

2

You are correct that Beagle should be available at context['Beagle']. To create a new instance from Dart you need to use the JsObject constructor:

var beagle = new JsObject(context['Beagle']);

Once you do that you can call run with the callMethod method:

beagle.callMethod('run');

answered Mar 21, 2014 at 19:18

Justin Fagnani

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2 Comments

Sungguk Lim Over a year ago

ok, then how can I create Beagle.prototype.run ? does it same rule? context['Beagle']['prototype']['run'] = new JsObject(...)? or prototype has different rule?

Justin Fagnani Over a year ago

I don't understand your question. Given the above JavaScript, the Dart I showed you is how you access it. Are you looking to define your JavaScript prototype from Dart? It's doable, but unless there's a very good reason, I'd keep your JavaScript in JavaScript.

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