using javascript core functions

[zishanj]

Why I can't use javascript core functions like String.fromCharCode directly inside double-mustache?

[kevinpschaaf]

Polymer currently only supports using inline functions defined on the element prototype, for simplicity.

Marking this as an enhancement request for now. In the meantime, you can do

{{fromCharCode(foo)}}

and

fromCharCode: function(val) {
   return String.fromCharCode(val);
}

If you'd like to use that in a lot of elements, you can define fromCharCode in a behavior that is shared among multiple elements.

[zishanj]

Thanks... It would be great if this enhancement is implemented in future release.