43dac1ee8d
Stacked on #30410. Use "owner stacks" as the appended component stack if it is available on the Fiber. This will only be available if the enableOwnerStacks flag is on. Otherwise it fallback to parent stacks. In prod, there's no owner so it's never added there. I was going back and forth on whether to inject essentially `captureOwnerStack` as part of the DevTools hooks or replicate the implementation but decided to replicate the implementation. The DevTools needs all the same information from internals to implement owner views elsewhere in the UI anyway so we're not saving anything in terms of the scope of internals. Additionally, we really need this information for non-current components as well like "rendered by" views of the currently selected component. It can also be useful if we need to change the format after the fact like we did for parent stacks in: https://github.com/facebook/react/pull/30289 Injecting the implementation would lock us into specifics both in terms of what the core needs to provide and what the DevTools can use. The implementation depends on the technique used in #30369 which tags frames to strip out with `react-stack-bottom-frame`. That's how the implementation knows how to materialize the error if it hasn't already. Firefox: <img width="487" alt="Screenshot 2024-07-21 at 11 33 37 PM" src="https://github.com/user-attachments/assets/d3539b53-4578-4fdd-af25-25698b2bcc7d"> Follow up: One thing about this view is that it doesn't include the current actual synchronous stack. When I used to append these I would include both the real current stack and the owner stack. That's because the owner stack doesn't include the name of the currently executing component. I'll probably inject the current stack too in addition to the owner stack. This is similar to how native Async Stacks are basically just appended onto the current stack rather than its own.
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 Quick Start to get a taste of React.
- Add React to an Existing Project to use as little or as much React as you need.
- Create a New React App if you're looking for a powerful JavaScript toolchain.
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:
- Quick Start
- Tutorial
- Thinking in React
- Installation
- Describing the UI
- Adding Interactivity
- Managing State
- Advanced Guides
- API Reference
- Where to Get Support
- Contributing Guide
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.
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.