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SPFx State Management: Solving State Complexity in the SharePoint Framework

2,018 words, 11 minutes read time.

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The Evolution of State in the SharePoint Framework

The transition from the “Classic” SharePoint era to the modern SharePoint Framework (SPFx) represents more than just a change in tooling; it marks a fundamental shift in how developers must manage data persistence and component synchronization. In the early days of client-side customization, state was often handled implicitly through the DOM or global variables, a practice that led to fragile, difficult-to-maintain scripts. Today, as we build sophisticated, multi-layered applications using React and TypeScript, state management has become the primary determinant of application stability and performance. Within a shared environment like SharePoint Online, where a single page may host multiple independent web parts, the complexity of managing shared data—such as user profiles, list items, and configuration settings—requires a disciplined architectural approach. Failing to implement a robust state strategy often results in “jank,” data inconsistency, and a bloated memory footprint that negatively impacts the end-user experience.

When developers rely solely on localized state within individual components, they often inadvertently create “data silos.” This fragmentation becomes evident when a change in one part of the application—for example, a status update in a details pane—is not reflected in a summary dashboard elsewhere on the page. To solve this, developers must move beyond basic reactivity and toward a model of “deterministic data flow.” This means ensuring that every piece of data has a clear, single source of truth and that updates propagate through the application in a predictable manner. By treating state management as a core engineering pillar rather than a secondary concern, teams can build SPFx solutions that are resilient to the inherent volatility of the browser environment and the frequent updates of the Microsoft 365 platform.

Evaluating Local Component State vs. Centralized Architectures

The most common architectural question in SPFx development is determining when to move beyond React’s built-in useState and props in favor of a centralized store. For simple web parts with a shallow component tree, localized state is often the most performant and maintainable choice. It offers low overhead, high readability, and utilizes React’s core strengths without additional boilerplate. However, as an application grows in complexity, the limitations of this “bottom-up” approach become clear. “Prop-drilling”—the practice of passing data through multiple layers of intermediate components that do not require the data themselves—creates a rigid and fragile structure. This not only makes refactoring difficult but also complicates the debugging process, as tracing the origin of a state change requires navigating through an increasingly complex web of interfaces and callbacks.

 // Example: The complexity of Prop-Drilling in a deep component tree  // This architecture becomes difficult to maintain as the application scales.   interface IAppProps {    currentUser: ISiteUser;    items: IListItem[];    onItemUpdate: (id: number) => void;  }   const ParentComponent: React.FC<IAppProps> = (props) => {    return <IntermediateLayer {...props} />;  };   const IntermediateLayer: React.FC<IAppProps> = (props) => {    // This component doesn't use the props, but must pass them down.    return <DeepChildComponent {...props} />;  };   const DeepChildComponent: React.FC<IAppProps> = ({ items, onItemUpdate }) => {    return (      <div>        {items.map(item => (          <button onClick={() => onItemUpdate(item.Id)}>{item.Title}</button>        ))}      </div>    );  };

A centralized state architecture solves this by providing a dedicated layer for data management that exists outside the UI hierarchy. This decoupling allows components to remain “dumb” and focused purely on rendering, while a service layer or store handles the business logic, API calls via PnPjs, and data caching. From a performance perspective, centralized stores that utilize selectors can significantly reduce unnecessary re-renders. Unlike the React Context API, which may trigger a full-tree re-render upon any change to the provider’s value, advanced state managers allow components to subscribe to specific “slices” of data. This granular control is essential for maintaining a high frame rate and responsive UI in complex SharePoint environments where main-thread resources are at a premium.

Implementing the Singleton Service Pattern for Data Consistency

To move beyond the limitations of component-bound logic, lead developers often implement a Singleton Service pattern. This approach centralizes all interactions with the SharePoint REST API or Microsoft Graph into a single, predictable instance that manages its own internal state. By utilizing this pattern, you effectively decouple the Microsoft 365 environment from your React view layer, ensuring that your data fetching logic is not subject to the mounting or unmounting cycles of individual components. In a high-traffic SharePoint tenant, this architecture allows for aggressive caching strategies; the service can determine whether to return an existing array of list items from memory or to initiate a new asynchronous request via PnPjs. This significantly reduces the network overhead and prevents the “double-fetching” phenomenon often seen when multiple web parts or components request the same user profile or configuration data simultaneously.

 // Implementing a Singleton Data Service with PnPjs  import { spfi, SPFI, SPFx } from "@pnp/sp";  import "@pnp/sp/webs";  import "@pnp/sp/lists";  import "@pnp/sp/items";   export class SharePointDataService {    private static _instance: SharePointDataService;    private _sp: SPFI;    private _cache: Map<string, any> = new Map();     private constructor(context: any) {      this._sp = spfi().using(SPFx(context));    }     public static getInstance(context?: any): SharePointDataService {      if (!this._instance && context) {        this._instance = new SharePointDataService(context);      }      return this._instance;    }     public async getListItems(listName: string): Promise<any[]> {      if (this._cache.has(listName)) {        return this._cache.get(listName);      }      const items = await this._sp.web.lists.getByTitle(listName).items();      this._cache.set(listName, items);      return items;    }  }

The strength of this pattern lies in its ability to maintain data integrity across the entire SPFx web part lifecycle. When a user performs a write operation—such as updating a list item—the service handles the PnPjs call and then immediately updates its internal cache. Any component subscribed to this service or re-invoking its methods will receive the updated data without needing a full page refresh. This creates a highly responsive, “app-like” feel within the SharePoint interface. Furthermore, because the state is held in a standard TypeScript class rather than a React hook, the logic remains testable in isolation. You can write unit tests for your data mutations without the overhead of rendering a DOM or simulating a React environment, which is a critical requirement for enterprise-grade software delivery.

Advanced Patterns: Integrating Redux Toolkit for Multi-Web Part Coordination

For the most complex SharePoint applications—those involving multi-step forms, real-time dashboards, or coordination across several web parts—Redux Toolkit (RTK) provides the industrial-grade infrastructure necessary to manage state at scale. RTK standardizes the “reducer” pattern, ensuring that every state mutation is performed through a dispatched action. This unidirectional flow is vital in the SharePoint Framework because it eliminates the unpredictable side effects associated with shared mutable state. By defining “slices” for different domains, such as a ProjectSlice or a UserSlice, you create a modular architecture where each part of the state is governed by specific logic. This modularity is particularly useful when managing complex asynchronous lifecycles; RTK’s createAsyncThunk allows you to track the exact status of a SharePoint API call—pending, fulfilled, or rejected—and update the UI accordingly.

 // Redux Toolkit Slice for managing SharePoint List State  import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';  import { SharePointDataService } from './SharePointDataService';   export const fetchItems = createAsyncThunk(    'list/fetchItems',    async (listName: string) => {      const service = SharePointDataService.getInstance();      return await service.getListItems(listName);    }  );   const listSlice = createSlice({    name: 'sharepointList',    initialState: { items: [], status: 'idle', error: null },    reducers: {},    extraReducers: (builder) => {      builder        .addCase(fetchItems.pending, (state) => {          state.status = 'loading';        })        .addCase(fetchItems.fulfilled, (state, action) => {          state.status = 'succeeded';          state.items = action.payload;        })        .addCase(fetchItems.rejected, (state, action) => {          state.status = 'failed';          state.error = action.error.message;        });    },  });

One of the primary advantages of utilizing Redux in an SPFx context is the ability to leverage the Redux DevTools browser extension. In a complex tenant where multiple scripts and web parts are competing for resources, being able to “time-travel” through your state changes allows you to see exactly when and why a piece of data changed. This transparency is invaluable for debugging race conditions that occur when multiple asynchronous SharePoint requests return out of order. Furthermore, RTK allows for the implementation of persistent state. By utilizing middleware, you can sync your Redux store to the browser’s localStorage or sessionStorage, ensuring that if a user accidentally refreshes the SharePoint page, their progress in a complex task is hydrated back into the application immediately. This level of sophistication transforms a standard SharePoint web part into a robust enterprise application.

Performance Benchmarking: Minimizing Re-renders in Large-Scale Apps

Maintaining a high-performance SPFx web part requires more than just functional state; it requires an understanding of the browser’s main thread and the cost of the React reconciliation process. In a SharePoint page, your web part is often competing with dozens of other Microsoft-native scripts and third-party extensions. If your state management strategy triggers global re-renders for minor data updates, you are effectively starving the browser of the resources needed to remain responsive. Performance benchmarking reveals that the React Context API, while convenient, is frequently the culprit behind significant “jank” in large-scale apps. Because a Context Provider notifies all consumers of a change, even a simple toggle of a UI theme can force a massive, expensive re-evaluation of a complex data grid.

To solve this, professional SPFx development necessitates the use of tactical optimizations such as memoization and selective rendering. By utilizing React.memo for functional components and useMemo or useCallback for expensive computations and event handlers, you ensure that components only re-render when their specific slice of data has changed. Furthermore, when using a centralized store like Redux or a custom Observable service, you should implement granular selectors. These selectors act as guards, preventing the UI from reacting to state changes that do not directly affect the visible output. Benchmarking these optimizations in a production tenant often shows a reduction in scripting time by 30% to 50%, which is the difference between a web part that feels native to SharePoint and one that feels like an external burden on the page.

 // Optimization: Using Selectors and Memoization to prevent over-rendering  import React, { useMemo } from 'react';  import { useSelector } from 'react-redux';   export const ExpensiveDataGrid: React.FC = () => {    // Use a selector to grab only the necessary slice of state    const items = useSelector((state: any) => state.list.items);    const status = useSelector((state: any) => state.list.status);     // Memoize expensive calculations to prevent re-computation on every render    const processedData = useMemo(() => {      return items.filter(item => item.IsActive).sort((a, b) => b.Id - a.Id);    }, [items]);     if (status === 'loading') return <div className="shimmer" />;     return (      <table>        {processedData.map(item => (          <tr key={item.Id}><td>{item.Title}</td></tr>        ))}      </table>    );  };   // Wrap in React.memo to prevent re-renders if parent state changes but props don't  export default React.memo(ExpensiveDataGrid);

Conclusion: Establishing an Organizational Standard for State

Solving state complexity in the SharePoint Framework is not about finding a “one-size-fits-all” library, but about establishing an engineering standard that prioritizes predictability and performance. Whether your team settles on the explicit simplicity of props, the robustness of a Singleton Service, or the industrial scale of Redux Toolkit, the choice must be documented and enforced across the codebase. A standardized state architecture reduces the cognitive load on developers, accelerates the onboarding process for new team members, and ensures that the custom solutions you deliver to your organization are maintainable long after the initial deployment.

As the Microsoft 365 ecosystem continues to evolve, the web parts that survive are those built on sound architectural principles rather than short-term convenience. By decoupling your business logic from the UI and managing your data lifecycle with precision, you create applications that are not only faster and more reliable but also significantly easier to extend. In the high-stakes environment of enterprise SharePoint development, architectural discipline is the ultimate competitive advantage. It allows you to transform a collection of disparate components into a cohesive, high-performance system that meets the rigorous demands of the modern digital workplace.

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D. Bryan King

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The views and opinions expressed in this post are solely those of the author. The information provided is based on personal research, experience, and understanding of the subject matter at the time of writing. Readers should consult relevant experts or authorities for specific guidance related to their unique situations.

Bryan King Feb 16

The 3 React Upgrades SPFx Devs Are Ignoring (And Why Your Web Parts Are Leaking Performance)

1,402 words, 7 minutes read time.

Let’s cut the fluff: if your SPFx web parts feel sluggish, your state management is spaghetti, or your page crashes under moderate load, it’s because you’re not playing with React the way it’s meant to be played in 2026. The latest version of SPFx ships with React 18 support, but most devs treat it like yesterday’s framework, dragging legacy habits into modern code. I’ve seen it countless times: web parts patched with workarounds, effects firing endlessly, unoptimized re-renders eating CPU cycles, and junior devs praying that no one notices. The hard truth? If you can’t adapt to React’s new features, your code is dying on the vine, and so is your professional credibility.

This isn’t a gentle nudge. I’m here to break down the three React upgrades SPFx developers ignore at their own peril, why they matter technically, and how they mirror discipline—or the lack thereof—in your professional and personal life. First, we tackle the core of modern React: Concurrent Rendering and Automatic Batching.

Concurrent Rendering and Automatic Batching – Your Web Parts’ Backbone

When React 18 dropped concurrent rendering and automatic batching, it wasn’t a luxury—it was a lifeline. Most SPFx devs never adjust their components for this. They cling to class components with componentDidMount hacks or use hooks incorrectly, leaving effects firing multiple times, state updates queuing chaotically, and memory leaks piling up. In SPFx, where your web part is a node on the page with other parts loading simultaneously, this isn’t minor—it’s the difference between a smooth user experience and a browser meltdown.

I’ve refactored dozens of enterprise SPFx solutions. If your useEffect calls aren’t guarded, or you don’t understand how React batches state updates automatically now, you’re wasting render cycles and bleeding performance. Imagine deploying a web part that triggers three API calls per keystroke in a search box because you didn’t wrap state changes in proper batching logic. That’s a professional facepalm waiting to happen.

This is also about integrity. Your components are the kernel of your web part. If they panic, the whole page goes down. Every unguarded effect, every missed cleanup is like leaving a socket exposed: it’s dangerous, messy, and shows laziness. Learning concurrent rendering and embracing automatic batching isn’t optional; it’s the same principle you apply in life when you keep promises, manage your commitments, and clean up after yourself. Half measures don’t cut it in code or character.

From a pure technical perspective, understand that concurrent rendering allows React to interrupt long-running renders, prioritizing urgent updates and keeping the UI responsive. Automatic batching merges multiple state updates into a single render, reducing unnecessary DOM recalculations. In SPFx web parts, where you might be calling the SharePoint REST API or Microsoft Graph, this translates into fewer wasted renders, less flicker, and a page that doesn’t tank when multiple web parts fire simultaneously. It’s subtle, but anyone ignoring this is coding in yesterday’s world.

The takeaway is simple: refactor your legacy components, embrace hooks fully, and make React 18 work for you, not against you. Stop treating batching as magic and understand the lifecycle implications. Every clean render, every optimized state transition, is a reflection of the discipline you either bring or fail to bring to your work.

Suspense, Lazy Loading, and Code Splitting – Stop Shipping Monoliths

If you’re still bundling every component into a single SPFx web part, congratulations—you’re shipping a monolith nobody wants to wait for. React 18’s Suspense, combined with lazy loading, is your ticket to scalable, maintainable, and performant web parts. Yet most devs ignore it. They either don’t understand it or they fear breaking things, so they cling to the “just load everything upfront” mindset. That’s cowardice, plain and simple.

Suspense lets React pause rendering until a component or data is ready. Lazy loading defers non-critical components, shaving precious milliseconds off initial load time. In SPFx, where your web part might pull data from multiple lists, libraries, or Microsoft Graph endpoints, ignoring this is a performance crime. I’ve watched junior developers bake everything into bundle.js, resulting in 3MB downloads for a single web part. Users hate that. Management hates that. And your reputation? Tanking.

Implementing Suspense properly isn’t just technical. It forces discipline in planning component structure, dependencies, and render order. Every lazy-loaded component you ship cleanly mirrors your ability to compartmentalize and manage complexity in real life. A man who leaves tasks half-done, who tries to juggle everything without order, is coding like he lives: chaotic, inefficient, and fragile. You want clean SPFx web parts? Start thinking like a disciplined architect.

Technically, wrapping your web parts with Suspense and splitting components using React.lazy() reduces initial payload and allows React to prioritize urgent renders. Combined with proper error boundaries, you’re not just optimizing performance—you’re creating a resilient system. Lazy-loading non-critical components is like building load-bearing walls before the decorative trim: prioritize stability, then polish. Any SPFx dev ignoring this is playing checkers in a chess game.

Strict Mode, DevTools, and Type Safety – Expose Your Weak Links

React 18’s Strict Mode is more than a debug feature—it’s a truth serum for sloppy code. When enabled, it intentionally double-invokes certain functions and effects to highlight side effects, memory leaks, and unsafe lifecycles. Most SPFx developers disable it immediately because it “spams the console.” That’s the coward’s move. You’re afraid to face your mistakes.

I run Strict Mode on every SPFx project. Every memory leak caught early saves headaches later. Every unclean effect prevented saves CPU cycles and user frustration. Pair that with TypeScript’s type enforcement and React DevTools profiling, and you’re not just coding—you’re auditing, refactoring, and hardening your web parts. Anything less is negligent.

The life lesson here is brutal but simple: discipline exposes weakness. If you’re not testing, profiling, and pushing your code to reveal flaws, you’re hiding from your own incompetence. Your character is the kernel; your habits are the state. If you panic under load, everything around you suffers. Apply Strict Mode and type safety to React in SPFx, and you build a muscle: resilience, foresight, and accountability.

Technically, the combination of Strict Mode and TypeScript ensures that your SPFx web parts are robust against async pitfalls, improper effect cleanup, and improper prop usage. Every refactor becomes a proof point that you can maintain complex systems with minimal technical debt. If you ignore it, you’re shipping spaghetti and calling it gourmet.

Conclusion: No-Excuses Mastery – Ship Like a Pro or Ship Like a Junior

Here’s the brutal truth: React 18 in SPFx is a weapon. Ignore concurrent rendering, batching, Suspense, lazy loading, Strict Mode, or TypeScript, and you’re not a developer—you’re a liability. You can’t pretend old habits will carry you; they won’t. Your web parts crash, your users suffer, and your reputation bleeds like memory leaks in an unoptimized component.

Refactor. Optimize. Audit. Stop shipping half-baked web parts. Embrace concurrent rendering to stabilize your core, implement Suspense and lazy loading to manage complexity, and enforce strict checks and type safety to expose weaknesses before they hit production. Every module you clean, every effect you guard, every render you optimize reflects the man you are—or refuse to be.

No more excuses. Ship like a professional, or get left behind. Your SPFx web parts are a reflection of your discipline, attention to detail, and mastery of modern frameworks. Treat them with respect. Treat your craft with respect. And for anyone serious about leveling up, subscribe, comment, or reach out—but only if you’re ready to put in the work. Half measures are for hobbyists.

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D. Bryan King

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Bryan King Dec 15

Stop Fighting SharePoint: SPFx Tricks That Actually Work in Real Projects

1,303 words, 7 minutes read time.

Introduction

If you’ve spent any time building SharePoint solutions, you know it can feel like wrestling a stubborn machine that refuses to cooperate. Modern SharePoint development promises flexibility, but without the right approach, it often delivers frustration. That’s where the SharePoint Framework (SPFx) steps in—your toolkit for building modern, maintainable, and high-performing SharePoint web parts that actually work in the real world.

But SPFx isn’t magic. To use it effectively, you need more than the basics. You need strategies that save time, improve performance, and make your solutions reliable. In this post, I’ll show you three core ways to stop fighting SharePoint and start building like a seasoned pro. First, we’ll tackle structuring SPFx projects for maintainability, ensuring your code doesn’t turn into a tangled mess. Then, we’ll explore mastering API interactions, because data drives every modern SharePoint application, and poorly managed requests are a developer’s nightmare. Finally, we’ll dive into performance and UI optimization, showing how to make web parts fast, responsive, and visually polished.

These three pillars—structure, data, and performance—are what separate developers who survive in production from those constantly firefighting. By the end of this article, you’ll have actionable, battle-tested tactics to make SPFx work for you rather than against you.

Structuring SPFx Projects for Maintainability

When most developers jump into SPFx, they focus on getting something to work. They generate a web part, write a bunch of React code, and call it a day. The problem is that this approach often leads to “God Web Parts”—massive, monolithic components that become impossible to maintain or expand. Structuring your project from the start is critical if you want long-term success.

A solid SPFx architecture is about separation of concerns. Services should handle data fetching, interfaces should define the shapes of your objects, and components should focus purely on rendering. For example, if you’re building a dashboard web part that pulls data from multiple SharePoint lists, don’t load all the logic inside the component. Create dedicated services for each list, then pass structured data into your UI components. This makes the web part easier to test, debug, and extend over time.

Another key aspect is consistent folder and naming conventions. Experienced developers know that a well-organized project is like a tidy workshop: when everything has a place, you waste less time searching for tools. Group related components together, separate utilities, and use descriptive names. Avoid magic strings or hard-coded paths.

Finally, don’t ignore lifecycle management. Understanding SPFx lifecycle hooks—like onInit, onDispose, and onAfterRender—allows you to manage resource cleanup, optimize data loading, and prevent memory leaks. It’s the difference between a web part that runs smoothly and one that slows the page to a crawl.

By approaching SPFx projects with structure and discipline, you’re not just writing code—you’re building maintainable, scalable solutions that future you (and your team) will thank you for.

Mastering API Interactions Without Losing Your Mind

Modern SharePoint solutions rely heavily on data. Whether you’re integrating Microsoft Graph, using SharePoint REST, or leveraging PnPjs, handling API interactions correctly is essential. Poorly managed API calls can result in throttling, slow performance, and bugs that appear out of nowhere—like a gremlin hiding in your code.

The first rule is centralize your API logic. Create service classes or modules that handle authentication, request batching, and error handling. PnPjs makes this straightforward, but only if you use it wisely. For instance, batch multiple REST requests together instead of firing off separate calls for each item. This reduces network overhead and prevents throttling issues, especially in large tenant environments.

Next, understand caching strategies. Not every request needs to hit SharePoint in real time. Store frequently accessed data in memory or session storage, and refresh it intelligently. This improves load times and gives users a more responsive experience.

Security is another critical consideration. Always handle tokens securely and request the minimum permissions necessary. Mishandled API calls can expose sensitive data and create compliance headaches. Think of this like locking the doors of your workshop: skipping it might seem convenient, but the consequences are serious.

Finally, plan for failure. Network errors, throttling, and permission issues happen. Use global error boundaries and fallback UI to maintain a smooth user experience even when things go wrong. With careful planning, your API layer becomes a dependable foundation instead of a constant source of frustration.

Performance and UI Optimization: Making SPFx Web Parts Feel Lightning-Fast

Even well-structured projects with reliable APIs can feel sluggish if you ignore performance and user experience. Web part optimization is more than a nice-to-have—it’s a measure of professionalism. Slow-loading web parts frustrate users and erode confidence in your solutions.

Start with bundle management. SPFx projects can bloat quickly if you include unnecessary dependencies. Use dynamic imports for rarely used components, tree-shake unused libraries, and leverage CDN-hosted assets when possible. A lean bundle is a fast bundle.

React-specific optimizations matter too. Use functional components and hooks wisely, memoize expensive computations, and avoid unnecessary re-renders. These practices cut down on CPU overhead and improve responsiveness, especially on dashboards with multiple web parts.

UI design also influences perception. Fluent UI provides a solid base, but subtle touches—smooth loading animations, consistent spacing, and clear iconography—can make your web parts feel polished. Dark mode support, accessibility considerations, and responsive layouts aren’t just checkboxes—they communicate competence and attention to detail.

Finally, consider preloading and lazy loading strategies. Load critical data first and defer non-essential resources. This approach improves perceived performance and keeps users engaged, even on slower networks. Think of it as tuning an engine: the smoother it runs under load, the better the ride for everyone.

By combining thoughtful performance techniques with a polished UI, your SPFx solutions won’t just work—they’ll impress. Users will notice the speed and responsiveness, and you’ll earn respect as a developer who delivers quality under pressure.

Conclusion

Stop fighting SharePoint. With the right SPFx approach, you can turn frustration into mastery, building web parts that are maintainable, reliable, and fast. The three pillars we covered—structuring your projects for maintainability, mastering API interactions, and optimizing performance and UI—form the foundation of a professional, battle-tested SharePoint developer workflow.

Structured projects prevent chaos, centralized and secure API logic keeps data flowing smoothly, and optimized web parts deliver speed and polish that users appreciate. These strategies aren’t theoretical—they’re tested in real-world environments where deadlines, scalability, and performance matter.

Take these lessons, apply them, and watch your SharePoint projects stop being a headache and start being a source of pride. Subscribe to the newsletter, leave a comment with your own SPFx tricks, or reach out directly. SharePoint doesn’t have to fight you—if you build smart, it becomes the tool you always wished it could be.

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D. Bryan King

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