> callbacks from super elements are not called when overridden This is normal for JavaScript inheritance chains. Any method (including callbacks) resolves to the most-derived (subclass) implementation. The subclass gets the choice of when/how/if to call a superclass method.
I.e., if x-foo has a method 'doStuff', and x-bar extends x-foo, then x-bar can override doStuff and: - completely redefine doStuff behavior by reimplementing and never calling x-foo.prototype.doStuff - do some work, then call this.super() to get the default behavior, then do more work - capture the return value of this.super() and modify or act on it - control arguments sent to x-foo implementation via this.super() (note that super takes an _array_ of pass-through arguments as a parameter, e.g. `this.super(arguments)` or `this.super([a, 3, null])) If you automate calling super-class methods, you lose all the flexibility above. This is why we jump through several hoops to provide `this.super` method. On Mon, Feb 17, 2014 at 6:01 AM, Julien Eluard <[email protected]>wrote: > Hi, > > testing the 'extends' feature I was surprised to see that callbacks from > super elements are not called when overridden. Super callbacks are called > when no overrides are provided. Note that calling this.super() does what is > expected (see here: http://jsfiddle.net/29btP/) > I had a similar behavior when testing directly with Custom Element. > > Is that expected? I find it a little counterintuitive. > > Thanks, > Julien > > Follow Polymer on Google+: plus.google.com/107187849809354688692 > --- > You received this message because you are subscribed to the Google Groups > "Polymer" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/polymer-dev/a94807a6-88c5-480d-b2d1-be3c6ee290f2%40googlegroups.com > . > For more options, visit https://groups.google.com/groups/opt_out. > Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/CAHbmOLb9OxuR7tt_51sGeaZxBsGexoM5%3D6o2dzqRO5LErkc%2BrQ%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
