Provide support for data binding with boolean properties

[kito99]

Polymer's behavior with boolean properties is described in the docs and discussed in #1812, but I still don't see a clean solution for setting a boolean property in markup without using a hack like using an Object type or writing serialization/deserialization methods. Something like this should be possible:

<polymer-element boolean-property?="{{booleanValue}">

Using a special syntax would indicate this isn't a standard binding.

[TimvdLippe]

Could you clarify if this issue still exists? It seems to be working now: http://jsbin.com/xavelureti/edit?html,console

[arthurevans]

Setting a boolean property from static markup (not using a binding) works fine:

<polymer-element boolean-property> => element.booleanProperty is set to true (if that is a defined property on the element). If it's not a defined property, this just sets the attribute boolean-property.

Setting a boolean property from a binding also works fine:

<polymer-element boolean-property="[[booleanValue]]"> => element.booleanProperty is set to the value of booleanValue. Note that that there's no type coercion. If booleanValue is a string value, like "false", then booleanProperty is also set to the string "false", not boolean false. If you want to coerce the value, you may need to use a computed binding, like boolean-property="[[_toBoolean(notQuiteBooleanValue)]]".

Setting a boolean attribute using a binding also works fine:

<polymer-element boolean-attribute$="[[booleanValue]]"> => boolean-attribute is set, or not set, depending on the value of booleanValue.

All these are documented, so unless we hear back from the OP I think we can close.

[kito99]

Yes, this was a long time ago. We can close.