this.electronicFormat is not a function

[StyMaar]

When Calling the isValid method, this is the window element, then it doesn't have an electronicFormat method.

What is this supposed to be, and what is theelectronicFormat method ?

[StyMaar]

I didn't pay enough attention, electronicFormat is defined here which means the library assumes that this is the module itself. When importing this dependency with an ES6 import statement with webpack + babel 6 it doesn't work. It used to work with babel 5, idk why.