How to get custom attributes with fulfill in combobox?

asked 2017-09-08 08:26:10 +0800

dfar
1

updated 2017-09-13 11:35:25 +0800

cor3000
6280 ● 2 ● 7

In the simple way without fulfill parameter all works fine.

<combobox><custom-attributes a="A" /></combobox>

I can get custom attribute value: combobox.getAttribute("a");

But if use fulfill, I have no custom attributes even after handling onOpen event:

<combobox fulfill="onOpen">
  <custom-attributes a="A" />
</combobox>

combobox.getAttribute("a"); // returns null

What is the right way to get custom attributes with fulfill parameter using? Thanks.