This comment was originally written by dvorap...@gmail.com

*if I run it without any parameter

This comment was originally written by dvorapa...@gmail.com

And the second bug with close():

What steps will reproduce the problem?

1. create HTML element in HTML file
2. query it into your dart script as DialogElement
3. call element.show()
4. call element.close('some returned value')
5. run pub build and open the HTML file

What is the expected output? What do you see instead?
The dialog element should be shown if I call show() method and closed if I call close() method. It shows properly, but if I click on the button, which's click event listener calls close() method, it doesn't close.

What version of the product are you using? On what operating system?
Dart SDK 1.3.6 on Windows 7

Please provide any additional information below.
Interesting thing is, that the method hide(), which is not specified anywhere in the api.dartlang.org closes the dialog element perfectly!

Added Area-Library, Library-Html, Triaged labels.

I have a change out for changing the optionality of the parameter of close().

However, as a reminder DialogElement is unstable, so features are likely to break.

Added this to the Later milestone.
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I had a CL for this, but I talked with Leaf, and we're going to do a more comprehensive change on default values of optional parameters soon. Leaf is on it.

Set owner to @leafpetersen.
Removed this from the Later milestone.
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This comment was originally written by aleskv...@mailinator.com

Any progress on this?

Thanks for the ping. We've landed support for default values in our bindings layer. I've not yet pushed on surfacing this in dart:html, since there are quite a few other changes going on under the hood in that code right now. Assuming that there is no push back, I'll probably try to surface this soon. Setting milestone to 1.8 as a reminder to myself.

Added this to the 1.8 milestone.

Since this is assigned to the 1.8 milestone, I'm bumping the priority to high. Feel free to lower the priority and remove the 1.8 milestone marker.

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Added Accepted label.

cc @alan-knight.
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