Support for file type

Hey there, i’m running into a problem with a custom file select input component that expects an optional instance of File for the selectedFile: PropTypes.instanceOf(File) prop.

Now i defined a mobx-react-form field with type: 'file' and value: null for it but it still has a default value of '' (empty string), which results in an error because the file picker does not accept strings. How can i set default value to null in this case?

[foxhound87]

@DominikGuzei Using null on a simple input with type="file" I get:

Warning: `value` prop on `input` should not be null. Consider using the empty string to clear the component or `undefined` for uncontrolled components.

So the default value should be an empty string, and you should set null manually on your custom component.

[DominikGuzei]

Thanks for the ultra fast fix! works like a charm now 😉