🐛 Unable to parse JSON Decoder Error

[kivox]

Fiber version
Fiber v2.25.0

Issue description
Usually, you can unmarshal the error returned by a function into the struct it was declared as. Now the issue here is this struct is set as an internal property of the Fiber library, therefore, making it inaccessible to the project where Fiber is used in.

Location of the decoder's Error struct: github.com/gofiber/fiber/v2/internal/go-json/errors

Code snippet

func ParseBody(ctx *fiber.Ctx, body interface{}) *fiber.Error {
	// parse request to struct
	if err := ctx.BodyParser(body); err != nil {
		// This should parse the error's string into a struct of the error
		if jsonErr, ok := err.(*errors.UnmarshalTypeError); ok {
			// use jsonErr to get values from error
		} else {
			// The error is not an UnmarshalTypeError
			return fiber.ErrBadRequest
		}
	}

	return nil
}

[welcome]

Thanks for opening your first issue here! 🎉 Be sure to follow the issue template! If you need help or want to chat with us, join us on Discord https://gofiber.io/discord

[ReneWerner87]

Should be fixed by #1755