# musli-json
[<img alt="github" src="https://img.shields.io/badge/github-udoprog/musli-8da0cb?style=for-the-badge&logo=github" height="20">](https://github.com/udoprog/musli)
[<img alt="crates.io" src="https://img.shields.io/crates/v/musli-json.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/musli-json)
[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-musli--json-66c2a5?style=for-the-badge&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://docs.rs/musli-json)
[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/udoprog/musli/ci.yml?branch=main&style=for-the-badge" height="20">](https://github.com/udoprog/musli/actions?query=branch%3Amain)
JSON support for [Müsli] suitable for network and usually browser
communication.
JSON encoding is fully upgrade stable:
* ✔ Can tolerate missing fields if they are annotated with
`#[musli(default)]`.
* ✔ Can skip over unknown fields.
```rust
use musli::{Encode, Decode};
#[derive(Debug, PartialEq, Encode, Decode)]
struct Version1 {
name: String,
}
#[derive(Debug, PartialEq, Encode, Decode)]
struct Version2 {
name: String,
#[musli(default)]
age: Option<u32>,
}
let version2 = musli_json::to_vec(&Version2 {
name: String::from("Aristotle"),
age: Some(62),
})?;
let version1: Version1 = musli_json::from_slice(version2.as_slice())?;
assert_eq!(version1, Version1 {
name: String::from("Aristotle"),
});
```
[Müsli]: https://github.com/udoprog/musli