data-dialog created dynamically - templates

Question

I'm using polymer 1.0.
I'm trying to open a with on a clic on an element created dynamically with template repeat.
Here is the code :
<paper-button
data-dialog="modal"
on-click="dialogClick">
Click
</paper-button>
and the script (from doc) :
dialogClick: function(e) {
var button = e.target;
while (!button.hasAttribute('data-dialog') && button !== document.body) {
button = button.parentElement;
}
if (!button.hasAttribute('data-dialog')) {
return;
}
var id = button.getAttribute('data-dialog');
var dialog = document.getElementById(id);
alert(dialog);
if (dialog) {
dialog.open();
}
}
This work only if the value of data-dialog is simple text. If I want to change it by data-dialog="{{item.dialogName}}" for instance, it doesn't work. It is not found by the while loop and exit with the if. in the source code of the page, there is no data-dialog in the paper-button.
Any idea ?

Answer 1

I've ran into a similar problem when using data attributes on custom elements. You might want to subscribe to this polymer issue.
As a workaround, place the data attribute in a standard element that is a parent of the button and search for that one instead.
Also, you might want to consider using var button = Polymer.dom(e).localTarget instead of directly accessing e.target, since the later will give you an element deeper in the dom tree under shady dom.