### Add Jason Dependency to Mix Project

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Add `jason` to your dependencies in `mix.exs` to install the package.

```elixir
def deps do
  [{:jason, "~> 1.4"}]
end
```

--------------------------------

### Configure Absinthe.Plug with Jason Codec

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Specify `Jason` as the `:json_codec` option when using `Absinthe.Plug` to ensure proper JSON handling in your GraphQL API.

```elixir
plug Absinthe.Plug,
  schema: MyApp.Schema,
  json_codec: Jason
```

```elixir
forward "/api",
  to: Absinthe.Plug,
  init_opts: [schema: MyApp.Schema, json_codec: Jason]
```

--------------------------------

### Derive Jason.Encoder for External Structs (All Fields)

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use `Protocol.derive/3` outside of a module to generate a `Jason.Encoder` for a struct you do not own, encoding all its fields. Use with caution.

```elixir
Protocol.derive(Jason.Encoder, NameOfTheStruct)
```

--------------------------------

### Implement Jason.Encoder for Unsupported Collections

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Provide custom `Jason.Encoder` implementations for collection types like `MapSet`, `Range`, and `Stream` by converting them to lists before encoding.

```elixir
defimpl Jason.Encoder, for: [MapSet, Range, Stream] do
  def encode(struct, opts) do
    Jason.Encode.list(Enum.to_list(struct), opts)
  end
end
```

--------------------------------

### Derive Jason.Encoder for External Structs (Specific Fields)

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use `Protocol.derive/3` outside of a module to generate a `Jason.Encoder` for a struct you do not own, specifying the fields to encode.

```elixir
Protocol.derive(Jason.Encoder, NameOfTheStruct, only: [...])
```

--------------------------------

### Derive Jason.Encoder for Structs (All Fields)

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use the `@derive Jason.Encoder` attribute to automatically generate a `Jason.Encoder` implementation for a struct, including all its fields. Use with caution to avoid leaking private data.

```elixir
@derive Jason.Encoder
defstruct # ...

```

--------------------------------

### Derive Jason.Encoder for Structs (Specific Fields)

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use the `@derive {Jason.Encoder, only: [...]}` attribute to automatically generate a `Jason.Encoder` implementation for a struct, specifying which fields to include.

```elixir
@derive {Jason.Encoder, only: [....]}
defstruct # ...

```

--------------------------------

### Injecting Pre-encoded JSON Fragments

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use `Jason.Fragment` to embed already JSON-encoded strings within a structure that is about to be encoded. This prevents a decoding/encoding roundtrip, which is useful for caching or integrating with systems that provide pre-encoded JSON.

```elixir
already_encoded_json = Jason.encode!(%{hello: "world"})
Jason.encode!(%{foo: Jason.Fragment.new(already_encoded_json)})
```

--------------------------------

### Encode Elixir Data to JSON

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use `Jason.encode!` to convert Elixir data structures into JSON strings. This function will raise an error if encoding fails.

```elixir
iex(1)> Jason.encode!(%{"age" => 44, "name" => "Steve Irwin", "nationality" => "Australian"})
"{\"age\":44,\"name\":\"Steve Irwin\",\"nationality\":\"Australian\"}"
```

--------------------------------

### Decode JSON String to Elixir Data

Source: https://github.com/michalmuskala/jason/blob/master/README.md

Use `Jason.decode!` to parse a JSON string into Elixir data structures. This function will raise an error if decoding fails.

```elixir
iex(2)> Jason.decode!(~s({"age":44,"name":"Steve Irwin","nationality":"Australian"}))
%{"age" => 44, "name" => "Steve Irwin", "nationality" => "Australian"}
```

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