on-iron-activate fired before selected property changed

[simonfuhrmann]

Description

The on-iron-activate event is fired before the selected property changes. This means that it is impossible to find out the currently selected index in the listbox in the hadler for on-iron-activate.

While other events, like on-iron-selectfire after the selected property has changed, on-iron-activate is the only event that can be used to detect taps on items that are currently selected.

Expected outcome

In the handler for on-iron-activate, the selected property is properly set.

Actual outcome

In the handler for on-iron-activate, the previous selected property is set (or undefined if tapped for the first time).

Live Demo

https://glitch.com/edit/#!/ubiquitous-taker?path=public/my-element.html:25:0

Browsers Affected

It should affect all browsers, since it's an implementation issue. Only tested on Chrome.

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