However, calling it:
WebGLContextAttributes contextAttributes = WebGLContextAttributes.create();
Results in:
com.google.gwt.core.client.JavaScriptException: (ReferenceError) : mOu_g$ is not defined
Which isn't what I expected.
Doing this still works:
WebGLContextAttributes contextAttributes = Js.uncheckedCast(JsPropertyMap.of());
WebGLContextAttributes contextAttributes = Js.uncheckedCast(JsPropertyMap.of());
I don't have the closure compiler knowledge to understand what's going on here. Was the fix ( https://github.com/google/closure-compiler/issues/4250 ) not correct?
On Monday, 28 July 2025 at 8:20:37 pm UTC+10 Craig Mitchell wrote:
Thanks again Jens. Issue raised: https://github.com/google/closure-compiler/issues/4250
On Monday, 28 July 2025 at 6:55:23 pm UTC+10 Jens wrote:
Because it is only a dictionary (= a plain JS object)
In JS you simply do:
var canvas = document.getElementById('canvas');
var context = canvas.getContext('webgl', { antialias: false, stencil: true }); // 2nd argument is WebGLContextAttributes
var attributes = context.getContextAttributes();
Looks like it is again defined badly in closure-compiler externs. The generated elemental2 implementation should have a similar structure than for example elemental2 AddEventListenerOption. It is an interface with a static create() method which does exactly what you do in your solution.
See:
I think it should be @interface or @record instead of @constructor.
-- J.
Craig Mitchell schrieb am Montag, 28. Juli 2025 um 07:39:57 UTC+2:
I'm switching to use Elemental2, and it's fantastic. All the bindings I'll ever need. A big thank you to all that created it!
There are some strange things though. Like when setting up a WebGLRenderingContext, we need to pass WebGLContextAttributes.
However, doing:WebGLContextAttributes contextAttributes = new WebGLContextAttributes();
compiles fine, but at runtime throws:TypeError: $wnd.WebGLContextAttributes is not a constructor
I figured out I can do this instead:WebGLContextAttributes contextAttributes = Js.uncheckedCast(JsPropertyMap.of());
But why can't I just use its constructor? Am I doing something wrong?
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