File object becomes a basic js object

[oterral]

Description

When we use the From component in a wrapper component and pass formData via props., the Form component transforms Props to State in componentWillReceiveProps . Problem is when we use a custom widget with an input file, the File object is transformed to a basic object in mergeObjects function because the File object is detected as an object.

I guess the solution is to exclude File from isObject function.

Do you think it's the way to go? I don't see any exception than File object which could be bad detected.

Steps to Reproduce

1. Open https://codesandbox.io/s/n4mlxwq3ml
2. Open the browser console
3. Choose a file
4. See in the console onChange event is triggered twice and the File object changes.

Expected behavior

The File object stays a File object

Actual behavior

The File object becomes a basic js object

Version

1.3.0

[epicfaace]

@oterral , yes, that makes sense, you can just add a check to see if the input is an instance of File. I'd merge a PR that does this!

[oterral]

@epicfaace sorry to bother you with this. When is the next release planned ?

[epicfaace]

@oterral Likely next week. For now, you could just do npm install -S git+https://github.com/mozilla-services/react-jsonschema-form.git#0f4889c22457edeb57991f48a88d8d32b2a93ca7 to get the changes from the latest commit.