Apply SOLID in React as a set of design questions, not a mandate to recreate class-heavy architecture. Give components clear UI roles, keep rendering pure, and add a component, Hook, or dependency seam only when it improves understanding, reuse, or isolation.
What SOLID means in a React codebase
SOLID is a set of object-oriented design principles, not a React rulebook. React’s documented idioms center on function components, composition, Hooks, and code that can be understood locally. The mappings below are practical adaptations of those idioms—not official React interpretations of SOLID.
React describes interfaces as small, composable, nestable components, but does not set a universal component size or count. Its guidance is to decide what should be a component while describing the UI. React’s guide to describing the UI is a useful starting point.
React recommends function components for new work. Classes remain supported, but the Component reference says they are not recommended for new components. So the useful React translation of SOLID is usually about function components, composition, Hooks, and explicit dependencies—not inheritance hierarchies.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Start with React’s non-negotiables: pure rendering and controlled calls
React assumes each component is a pure function: given the same inputs, it should produce the same output. Components and Hooks should be idempotent, should not mutate props or state, and should keep side effects out of render. React documents these expectations in Rules of React and Keeping Components Pure.
- Use render to describe UI from the current props and state.
- Put side effects in event handlers or, when synchronization with an external system is needed, an Effect—not in render.
- Do not use an Effect merely to calculate a value that can be derived from current props or state during render.
- Do not mutate props or state; treat them as snapshots.
React controls when components and Hooks run. Render components through JSX rather than calling component functions as ordinary functions, and follow the Rules of Hooks: call Hooks at the top level of a function component or custom Hook. See React calls Components and Hooks and the Rules of React.
These constraints support local reasoning: a reader should be able to understand a component or Hook by looking at its code in isolation. That is also a practical test for whether an abstraction is helping. React’s purity reference explains this benefit.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Translate each SOLID principle into a React decision
Single responsibility: give a component a clear UI purpose
A component may contain several closely related details without violating a useful React design. A form that owns field interaction and validation can remain one component if those concerns change together and the code remains understandable. Extract a child when it represents a distinct UI responsibility, is reused, or has an independent reason to change.
Do not split every element or event handler into its own component just to shorten a file. Component boundaries should make the interface easier to describe and reason about, not create navigation work for its own sake.
Open/closed: compose known variations instead of predicting every future one
For a small number of known variants, use ordinary composition and explicit props. A slot, render prop, or strategy can help when real variants recur and can be added without making the base component harder to understand. Adding a configurable framework for hypothetical future cases is not a React requirement.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Liskov substitution: keep variants safe to use through a shared contract
In React, explicit props or interchangeable children are often clearer than subclass substitution. Whatever form variation takes, consumers should be able to use the shared component contract predictably rather than learn hidden special cases for each variant.
Interface segregation: keep props relevant to the role
Props should describe what a component actually uses. If it accepts many unrelated options, ask whether it combines separate roles or whether a smaller child or slot boundary would clarify its use. Do not mechanically invent a separate type or wrapper for every cluster of props.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Dependency inversion: add a seam only for a real dependency boundary
Put an external dependency behind a small seam when callers genuinely need to swap it, isolate it, or test meaningful behavior independently. A simple component does not need a service container or interface layer just to look architected. Keep external synchronization out of render; use an event handler or an Effect when the behavior calls for one.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Example: build a product filter without fragmenting it
Consider a product-list feature with category and price filters. Keep one feature component responsible for connecting the selected filters to the displayed results. The following illustrative code derives the visible products during render and does not mutate its inputs:
function ProductBrowser({ products }) {
const [category, setCategory] = useState("all");
const [maxPrice, setMaxPrice] = useState(Infinity);
const visibleProducts = products.filter((product) =>
(category === "all" || product.category === category) &&
product.price <= maxPrice
);
return (
<section>
<FilterPanel
category={category}
maxPrice={maxPrice}
onCategoryChange={setCategory}
onMaxPriceChange={setMaxPrice}
/>
<ProductList products={visibleProducts} />
</section>
);
}This example assumes useState is imported from React and that the input products have category and numeric price fields. It illustrates a design shape; it is not a tested implementation.
Keep the feature together when that is clearest
If the filter UI appears only here and the state transitions are straightforward, keeping the controls and filtering logic in the feature component can be the clearest option. A component does not become better simply because its lines have been moved elsewhere.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsBest Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Extract a component for a distinct UI responsibility
FilterPanel is a reasonable child when the controls form a distinct piece of UI, are reused, or have their own styling and change path. It receives the values and callbacks it needs; it does not need to own the entire product feature.
Extract a custom Hook when state logic deserves a name
If filter state transitions and derived filtering logic grow substantial enough to understand separately, a custom Hook such as useProductFilters can group that behavior. Call it at the top level of the component, and keep it focused on the state and calculations that belong together. Do not create a Hook for a single trivial expression merely to add another layer.
Add a dependency seam only when the data source really varies
If products are loaded from an API, keep that external work outside render. A data layer or injected function can be useful if the source is expected to vary or needs isolation for meaningful behavior. If the feature has one stable source and no such need, a service abstraction adds indirection without solving a present problem.
Use this test before extracting a component, Hook, or service
These questions are a practical decision aid, not an official React scorecard:
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match- Does the candidate have a distinct UI purpose or independent reason to change? If not, a new boundary may be arbitrary.
- Will extraction make its behavior easier to understand in isolation? A name alone does not guarantee clarity.
- Is there actual reuse or a known variation? Avoid building for flexibility that has no concrete use yet.
- Is a dependency genuinely likely to change or need isolation? If not, an interface or service layer may be unnecessary.
- Does the boundary reduce more complexity than it adds? Account for extra indirection, props, files, and navigation as well as coupling.
Compare the main choices by what they buy and what they cost:
| Choice | Best fit | Check before adding it |
|---|---|---|
| Keep logic in the feature component | One cohesive UI role with straightforward state and behavior | Can a reader follow the feature in one place? |
| Extract a child component | A distinct or reused UI responsibility, or one with an independent change path | Does the boundary clarify the UI rather than just move markup? |
| Extract a custom Hook | State transitions or calculations substantial enough to understand separately | Does the Hook group behavior that belongs together, and is it called according to Hook rules? |
| Add a dependency seam | A real dependency that must vary, be isolated, or support meaningful independent testing | Is that dependency boundary present today, rather than only hypothetical? |
The right choice depends on the feature: React sets no official threshold for component count or size, and no single structure fits every UI. The useful outcome is a clear responsibility boundary that preserves local understanding instead of multiplying layers.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
