Sebastian Markbåge
ef8bdbecb6
This adds `encodeReply` to the Flight Client and `decodeReply` to the Flight Server. Basically, it's a reverse Flight. It serializes values passed from the client to the server. I call this a "Reply". The tradeoffs and implementation details are a bit different so it requires its own implementation but is basically a clone of the Flight Server/Client but in reverse. Either through callServer or ServerContext. The goal of this project is to provide the equivalent serialization as passing props through RSC to client. Except React Elements and Components and such. So that you can pass a value to the client and back and it should have the same serialization constraints so when we add features in one direction we should mostly add it in the other. Browser support for streaming request bodies are currently very limited in that only Chrome supports it. So this doesn't produce a ReadableStream. Instead `encodeReply` produces either a JSON string or FormData. It uses a JSON string if it's a simple enough payload. For advanced features it uses FormData. This will also let the browser stream things like File objects (even though they're not yet supported since it follows the same rules as the other Flight). On the server side, you can either consume this by blocking on generating a FormData object or you can stream in the `multipart/form-data`. Even if the client isn't streaming data, the network does. On Node.js busboy seems to be the canonical library for this, so I exposed a `decodeReplyFromBusboy` in the Node build. However, if there's ever a web-standard way to stream form data, or if a library wins in that space we can support it. We can also just build a multipart parser that takes a ReadableStream built-in. On the server, server references passed as arguments are loaded from Node or Webpack just like the client or SSR does. This means that you can create higher order functions on the client or server. This can be tokenized when done from a server components but this is a security implication as it might be tempting to think that these are not fungible but you can swap one function for another on the client. So you have to basically treat an incoming argument as insecure, even if it's a function. I'm not too happy with the naming parity: Encode `server.renderToReadableStream` Decode: `client.createFromFetch` Decode `client.encodeReply` Decode: `server.decodeReply` This is mainly an implementation details of frameworks but it's annoying nonetheless. This comes from that `renderToReadableStream` does do some "rendering" by unwrapping server components etc. The `create` part comes from the parity with Fizz/Fiber where you `render` on the server and `create` a root on the client. Open to bike-shedding this some more. --------- Co-authored-by: Josh Story <josh.c.story@gmail.com>
React · 
React is a JavaScript library for building user interfaces.
- Declarative: React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable, simpler to understand, and easier to debug.
- Component-Based: Build encapsulated components that manage their own state, then compose them to make complex UIs. Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep the state out of the DOM.
- Learn Once, Write Anywhere: We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using React Native.
Learn how to use React in your project.
Installation
React has been designed for gradual adoption from the start, and you can use as little or as much React as you need:
- Use Online Playgrounds to get a taste of React.
- Add React to a Website as a
<script>tag in one minute. - Create a New React App if you're looking for a powerful JavaScript toolchain.
You can use React as a <script> tag from a CDN, or as a react package on npm.
Documentation
You can find the React documentation on the website.
Check out the Getting Started page for a quick overview.
The documentation is divided into several sections:
You can improve it by sending pull requests to this repository.
Examples
We have several examples on the website. Here is the first one to get you started:
import { createRoot } from 'react-dom/client';
function HelloMessage({ name }) {
return <div>Hello {name}</div>;
}
const root = createRoot(document.getElementById('container'));
root.render(<HelloMessage name="Taylor" />);
This example will render "Hello Taylor" into a container on the page.
You'll notice that we used an HTML-like syntax; we call it JSX. JSX is not required to use React, but it makes code more readable, and writing it feels like writing HTML. If you're using React as a <script> tag, read this section on integrating JSX; otherwise, the recommended JavaScript toolchains handle it automatically.
Contributing
The main purpose of this repository is to continue evolving React core, making it faster and easier to use. Development of React happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving React.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our contributing guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React.
Good First Issues
To help you get your feet wet and get you familiar with our contribution process, we have a list of good first issues that contain bugs that have a relatively limited scope. This is a great place to get started.
License
React is MIT licensed.