The bug has to do with unreachable paths, e.g.
var foo = {};
foo.bar.baz; // throws in JS. In TemplateBinding/polymer-expressions, this
path should evaluate to undefined (not throw). This was broken, but the
referenced bug fixes it.
On Thu, Jan 16, 2014 at 11:02 AM, Rob Eisenberg <[email protected]
> wrote:
> Can you explain the actual issue? When it's fixed, will I get control over
> the bind function again? or will it just fix the toString issue?
> A related question....since I'm using individual pollyfills, what's the
> best way to keep up with changes and keep my dependencies up to date? I'm
> guessing I should just track each individual repo...
>
>
> On Thu, Jan 16, 2014 at 1:40 PM, Eric Bidelman <[email protected]> wrote:
>
>> There's a bug:
>> https://groups.google.com/forum/?fromgroups=#!topic/polymer-dev/SPbOamjlbhc
>>
>> Should be fixed in the next push (likely today).
>>
>>
>> On Thu, Jan 16, 2014 at 9:13 AM, Rob Eisenberg <
>> [email protected]> wrote:
>>
>>> I had a pretty nice custom element system build on the pollyfills
>>> from Stable release 2013-11-07 When I updated to 0.1.2, everything broke.
>>> I've been going throughout, fixing things bit by bit, but now I'm to a
>>> point where I'm wondering if there's something wrong with Polymer. It seems
>>> as if custom element binding are being evaluated before the element is
>>> upgraded. I'm not sure about that, but I can't explain the behavior I'm
>>> seeing any other way. Here's my custom element test code:
>>>
>>> var proto = Object.create(HTMLElement.prototype);
>>>
>>> proto.createdCallback = function () {
>>> this.customAttributes = {};
>>> console.log('created');
>>> };
>>>
>>> proto.attachedCallback = function() {
>>> console.log('attached');
>>> };
>>>
>>> proto.bind = function(name, value, oneTime) {
>>> console.log('bind', name, value, oneTime);
>>> };
>>>
>>> proto.setAttribute = function(name, value) {
>>> console.log('setAttribute', name, value);
>>> };
>>>
>>> proto.attributeChangedCallback = function(attrName, oldVal, newVal) {
>>> console.log('attribute changed', attrName, oldVal, newVal);
>>> };
>>>
>>> Object.defineProperty(proto, 'something', {
>>> get: function () {
>>> return this.customAttributes['something'];
>>> },
>>> set: function (val) {
>>> this.customAttributes['something'] = value;
>>> console.log('something change', value);
>>> }
>>> });
>>>
>>> document.registerElement('dx-test', { prototype: proto });
>>>
>>> Then I use it inside of one of my templates like this:
>>>
>>> <dx-test something="{{someProperty}}"></dx-test>
>>>
>>> When I do this, the only callback that is fired is *createdCallback * and
>>> by then it seems to have already parsed the bindings out. This prevents me
>>> from having any custom *bind* logic and even from reliably getting the
>>> value of my own property. If *something* is not a primitive value, then
>>> attribute's value is the result of *toString().*
>>>
>>> Am I doing something wrong here? Is this a bug?
>>>
>>> Follow Polymer on Google+: plus.google.com/107187849809354688692
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>>>
>>
>>
>
>
> --
> Rob Eisenberg,
> President - Blue Spire
> www.durandaljs.com
>
> Follow Polymer on Google+: plus.google.com/107187849809354688692
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> .
>
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