Windows Store Application - call windows runtime component from JavaScript

Question

I create new project (Windows Store application in Javascript). Then, I add to project new Windows Runtime Component (Class1.cs class is generated). If I call the component from JavaScript I get error:

0x800a1391 - JavaScript runtime error: 'Component' is undefined

default.js

var eventMan = new Component.Class1();

Class1.cs

namespace Component
{
    public sealed class Class1
    {
    }
}

Kraig Brockschmidt - MSFT · Accepted Answer · 2013-05-31 18:36:51Z

1

After adding the component project to your solution, right-click on the References in the JS project, select Add Reference, and in that dialog click "Solution" on the left and make sure your component is checked on the right. This is what wires up the component's namespace into JS. I suspect you're missing this step.

By the way, be mindful that using a C# component with JS incurs greater memory overhead to load the CLR (i.e. a second managed environment). We recommend writing components in C++ for use with JS. My blog post on this gives a few more details.

answered May 31, 2013 at 18:36

Kraig Brockschmidt - MSFT

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