I have a <template is="dom-repeat"> inside of an <iron-selector> (actually a <paper-listbox>). If I change the items inside the "dom-repeat" to a new Array, but the new Array has the same number of items as the old Array, the selection doesn't update.
I believe that I have tracked this down to _observeItems (or rather, the callback defined inside it), not firing in this situation.
I ran into this while implementing a cascaded dropdown, whereby the selection in one paper-dropdown-menu influenced the item list in the second.
This is on the latest 1.x iron-selector and Polymer component set so I'm not sure if this has been fixed already in 2.0
Expected outcome
When changing the nodes under iron-selector, _observeItems is run and "iron-items-changed" is fired, even if the list has the same number of elements as before.
Actual outcome
My second paper-menu-dropdown is showing the same selection as before since 'iron-items-changed' never fired.
Description
I have a
<template is="dom-repeat">
inside of an<iron-selector>
(actually a<paper-listbox>
). If I change the items inside the "dom-repeat" to a new Array, but the new Array has the same number of items as the old Array, the selection doesn't update.I believe that I have tracked this down to _observeItems (or rather, the callback defined inside it), not firing in this situation.
I ran into this while implementing a cascaded dropdown, whereby the selection in one paper-dropdown-menu influenced the item list in the second.
This is on the latest 1.x iron-selector and Polymer component set so I'm not sure if this has been fixed already in 2.0
Expected outcome
When changing the nodes under iron-selector, _observeItems is run and "iron-items-changed" is fired, even if the list has the same number of elements as before.
Actual outcome
My second paper-menu-dropdown is showing the same selection as before since 'iron-items-changed' never fired.
Live Demo
Steps to reproduce
Create this:
Set
this.myItems
to[{ Index: 1, Name: 'XX'}]
and "iron-items-changed" is fired as expected.Now set
this.myItems
to[{ Index: 2, Name: 'YY'}]
and "iron-items-changed" is not fired.Browsers Affected