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chore: intial outline of reconciler and scheduler

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Corbin Crutchley
2023-02-26 00:45:25 -08:00
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---
{
title: "React Internals: Understanding the Reconciler",
description: "",
published: '2023-05-05T13:45:00.284Z',
authors: ['crutchcorn'],
tags: ['react'],
attached: [],
license: 'cc-by-nc-sa-4'
}
---
React 18.2.0 source code: https://github.com/facebook/react/tree/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e
**Only focusing on React DOM code**
````jsx
ReactDOM.createRoot(document.getElementById("root")).render(
<React.StrictMode>
<App />
</React.StrictMode>
);
````
- `createRoot`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L166
- `createContainer`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L224-L233
- https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberReconciler.new.js#L247-L271
- `createFiberRoot`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberRoot.new.js#L134
- `new FiberRootNode`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberRoot.new.js#L52-L132
- `new ReactDOMRoot`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L242
- https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L88-L90
- `render`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L92
- `updateContainer`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-dom/src/client/ReactDOMRoot.js#L134
- `updateContainer`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberReconciler.new.js#L321
- `createUpdate`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberReconciler.new.js#L362-L365
- Assigns `element` to be rendered in update context
- `enqueUpdate`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberReconciler.new.js#L381
- `enqueueConcurrentClassUpdate`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberClassUpdateQueue.new.js#L264
- https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberConcurrentUpdates.old.js#L120-L124 (why `.old`?)
- ` scheduleUpdateOnFiber`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberWorkLoop.new.js#L533
- ` ensureRootIsScheduled`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberWorkLoop.new.js#L640
- `newCallbackNode`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberWorkLoop.new.js#L817-L820
- `scheduleCallback`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/ReactFiberWorkLoop.new.js#L47
- `Schedule.`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/react-reconciler/src/Scheduler.js#L16
- `scheduler` package: https://github.com/facebook/react/tree/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler
- `unstable_scheduleCallback`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L308
- `requestHostTimeout`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L370
- `callback` (which is `handleTimeout`): https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L592
- `handleTimeout`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L130
- `flushWork`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L137
- `workLoop`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L176
- `while (currentTask !== null)`: https://github.com/facebook/react/blob/9e3b772b8cabbd8cadc7522ebe3dde3279e79d9e/packages/scheduler/src/forks/Scheduler.js#L193-L196