In 2.0, fallback-selection doesn't work with empty string.

[tanin47]

Description

In 2.0, there's no way to default the selection to the first item if the first item's value is an empty stirng.

In my specific case, the first item of the list has the value as an empty string. I try setting fallback-selection to an empty string. It doesn't work as well.

I try setting fallback-selection to a non-empty string. It works fine.

In 1.0, it seems the default selection is the first item. --- this solves my problem.

Expected outcome

Default to the first item or allow default the selection to an empty string.

Actual outcome

The paper-dropdown-menu isn't selected.

Browsers Affected

• [x] Chrome
• [ ] Firefox
• [ ] Safari 9
• [ ] Safari 8
• [ ] Safari 7
• [ ] Edge
• [ ] IE 11
• [ ] IE 10

[tanin47]

I can't prove it in jsfiddle. Will reopen if I can.