Missing exception when I try to assing a file://... to ImageElement.src

[DartBot]

This issue was originally filed by off...@mikemitterer.at

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What steps will reproduce the problem?

1. final ImageElement image = form.query("#qrcode");
2. image.src = "file://assets/img/bootstrap-example-fluid.jpg";
3. Console:
   Not allowed to load local resource: file://assets/img/bootstrap-example-fluid.jpg

What is the expected output? What do you see instead?
The app fails silently. Not good. I would like to see a exeption instead.

What version of the product are you using? On what operating system?
Chromium: Version 21.0.1138.0 (137335)
Dart Editor: Version 0.1.0.201205161003, Build 7696

Please provide any additional information below.

[DartBot]

This comment was originally written by @bp74

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You have to add an error event handler to the image:
image.on.error(onErrorFunction);

loading an image is an asychronous process, so the error comes long after you have set the "src" attribute.

[DartBot]

This comment was originally written by antonm@google.com

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Added Invalid label.

[DartBot]

This comment was originally written by off...@mikemitterer.at

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Hmmmm, here is what I tried before I created the issue-report:

image.on.error.add((event) {
   print("onerror -image");
});
image.src = "file://assets/img/bootstrap-example-fluid.jpg";

I think this is what you ment with: image.on.error(onErrorFunction);

But print wont be called.

So I thought maybe it could be handled like in dart:io

Changed the error-handling behavior in dart:io. If an error occurs and there is no error handler an exception > will now be thrown. This gets rid of silent failures that makes applications hard to debug.

Wrong assumption...

Do you have further informations for me?
thx in advance

[DartBot]

This comment was originally written by antonm@google.com

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Sorry, I closed too fast. Reopening. How do you run your code, natively or compiled to JS?

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Added NeedsInfo label.

[DartBot]

This comment was originally written by off...@mikemitterer.at

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In Chromium - so native.

[anders-sandholm]

Added Area-Dartium, Triaged labels.

[DartBot]

This comment was originally written by antonm@google.com

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office@,

Do you compile your Dart code to JS first?

And may you, please, attach the full sample which demonstrates the problem?

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Added NeedsInfo label.

[DartBot]

This comment was originally written by antonm@google.com

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Ok, my quick test in JS tells me it's the behaviour we have in JS too, so I am closing as invalid for now, but, please, reopen if you have any additional considerations.

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Added Invalid label.