Floating Label Behavior

[StokeMasterJack]

There is a subtle difference in the way the floating label behaves between Polymer paper components and another material ui library that I am using (Material-UI).

It has to do with when the floating label decides to float.

In Polymer: label floats after you type the first character
In Material-UI: label floats on focus.

I'm not sure which one is correct. Or if there is a correct. But my app uses both libraries. Sometimes on the same page. And I would like to make it consistent.

Feature request: An attribute to control this behavior. For example:

<paper-input when-to-float-label="onFocus | onFirstChar"/>