This package allows you to write decoders for JSON objects that make sure that you handled all fields of the incoming JSON. For example,

```elm
import Json.Decode as D exposing (Decoder)
import DecodeComplete exposing (..)

type alias User =
    { name : String
    , age : Int
    }

userDecoder : Decoder User
userDecoder =
    object User
        |> require "name" D.string
        |> require "age" D.int
        |> discard "email"
        |> complete
```

decodes JSON objects that have precisely the fields `name`, `age`, and `email` and turns it into a `User` record, discarding the email address.

These decoders are turned into regular `Decoder`s at the end, so that they can be used with normal elm/json code.