merges Files, resulting in an object with just path

[rik-iso]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

"@fastify/deepmerge": "^2.0.1"

Plugin version

No response

Node.js version

20.x

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

15.3

Description

deepmerge considers a File a mergable object (passes isMergeableObject here), which results in a busted output (an object containing just the path field).

Similar to how that code special cases RegExp and Date, should it special case File?
If not, should there be a way for the user to provide their own function to augment/replace this if they want the behaviour I do? (which is specifically for the source file to overwrite the target File during a merge).

Link to code that reproduces the bug

No response

Expected Behavior

No response

[Uzlopak]

@rik-iso

THe problem is, that File is not always defined as a global object. Maybe we should check if the type of the object is a plain object?

[rik-iso]

Sorry I don't think I follow what you mean exactly

[Uzlopak]

See #68, will this fix your problem?

[Uzlopak]

@rik-iso

#68 got merged. So you should be able to modify isMergeableObject as soon as the new version of deepmerge is released.
So you can pass a custom isMergeableObject and check for File Objects.