if (props) ...

[comerc]

It look strange

[DominikGuzei]

Haha, why strange? this just checks if the props value from the config is a truthy value … but you're right, i could make it more explicit by checking if it is actually an object.

[comerc]

From readme:

You can pass any object to the props option, which provides a clean and validate function.

we need check: if (props is object) and (props.validate is function) and (props.clean is function)