Use Babel to emit JavaScript and transform modern syntax, and use TypeScript separately to check types. Install @babel/preset-typescript and @babel/preset-env, configure Babel for your source files and actual browser or runtime targets, then run tsc --noEmit as a distinct build step. Babel removes TypeScript syntax; it does not validate types.
Choose which tool emits JavaScript
In a common hybrid setup, Babel transforms TypeScript source into JavaScript while the TypeScript compiler checks the program. This lets you use Babel’s JavaScript syntax transforms without treating Babel as a replacement for TypeScript’s type checker. The TypeScript Handbook describes this division of work in its Babel with TypeScript guidance.
| Workflow | JavaScript emitter | Type checking | Declaration files | Syntax support and modules |
|---|---|---|---|---|
| Babel emission with TypeScript checking | Babel | Run TypeScript separately, typically with tsc --noEmit. |
Use TypeScript declaration emit as a separate step if publishing declarations. | Babel transforms syntax according to @babel/preset-env targets; module output depends on preset configuration and build integration. |
| TypeScript emission | tsc |
TypeScript compiler checks types as part of compilation. | TypeScript can emit declarations when configured to do so. | This is an alternative when TypeScript should handle JavaScript emission rather than Babel; configure its output for the project’s runtime and build setup. |
The hybrid workflow is useful when Babel is already responsible for the build’s JavaScript transforms. Do not assume the two emitters can be enabled indiscriminately: decide which one owns emitted JavaScript, and avoid relying on both to transform the same source in incompatible ways.
Install and configure Babel’s presets
Add the Babel packages required by your build pipeline: @babel/preset-typescript to strip TypeScript syntax and @babel/preset-env to select JavaScript syntax transforms for your targets. If your source contains JSX or TSX that needs React’s JSX transform, add @babel/preset-react as well. See the official docs for @babel/preset-typescript, @babel/preset-env, and @babel/preset-react.
#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.
A representative configuration in babel.config.json is:
{
"presets": [
["@babel/preset-env", { "targets": { "node": "current" } }],
"@babel/preset-typescript"
]
}node: "current" is only an example target; replace it with the actual Node version, browsers, or other runtime your project supports. Preset order and options can matter because Babel applies presets in reverse order. Adjust this representative shape to your Babel version and build integration rather than copying it as a universal configuration.
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.
Match the TypeScript preset to your file extensions
Babel’s TypeScript preset documents extension-specific behavior for .ts, .tsx, .mts, and .cts files. Its current documentation enables that behavior by default and describes ignoreExtensions for cases such as nonstandard file extensions. If using Babel CLI or Node CLI to process TypeScript files, include .ts in the CLI extensions setting so those files are handled.
Configure JSX and TSX explicitly
The TypeScript preset strips TypeScript syntax; it is not a general React JSX transform. For React JSX or TSX, configure suitable JSX handling, commonly by adding @babel/preset-react, and make sure the TypeScript preset’s extension handling includes the relevant TSX files.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsRank #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.
Set targets to the environments you actually support
@babel/preset-env selects syntax transforms based on configured browser or runtime targets. Set those targets from your deployment and support policy, not from an arbitrary example: a modern Node target and a browser-support range can require different transforms. Babel’s preset-env documentation describes it as a way to choose syntax transforms and, optionally, browser polyfills for target environments. Do not infer support for an environment that is absent from the target configuration.
Syntax transformation and API availability are separate concerns. A syntax transform does not, by itself, establish that every newer JavaScript API exists in the target runtime; review the project’s polyfill strategy if it relies on APIs that may be missing.
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
Keep module handling aligned with the build tool
When Babel is integrated with a bundler, generally leave preset-env’s modules option at its auto default. The caller information supplied by the integration can guide module handling. Set modules: false when preserving ES module syntax is the intended output, such as when the bundler should process those imports and exports itself. Choose based on the actual integration rather than setting either value reflexively.
Run type checking and declaration emit separately
Babel’s TypeScript transform removes type syntax but does not type-check the program. Babel also does not automatically follow changes to tsconfig.json; Babel’s transform has its own behavior and operates with isolated-module assumptions. A successful Babel build therefore does not establish that the source passes TypeScript checks.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Best 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.
- Use Babel in the build pipeline to emit JavaScript with the TypeScript and environment presets configured for the source and targets.
- Run
tsc --noEmitas a separate check, or use an equivalent TypeScript type-checking step. - If distributing TypeScript declarations, configure and run TypeScript declaration emit separately from Babel’s JavaScript transform.
Babel documents this limitation directly in its TypeScript transform documentation: the transform does not add type-checking. Syntactically transformable code can still fail TypeScript checks or behave unexpectedly, so keep the checker in the build or CI process wherever type correctness is required.
Account for Babel version and import-extension behavior
Preset options and defaults can change between Babel major versions. For example, the current preset documentation says onlyRemoveTypeImports defaults to true in Babel 8 and that allowDeclareFields will be enabled by default in Babel 8. Check the documentation for the Babel version installed in the project before depending on a default; do not assume those Babel 8 behaviors apply to earlier versions.
If source imports explicitly include .ts extensions, consider the preset’s rewriteImportExtensions option to rewrite them to JavaScript extensions in emitted code. This choice needs to match the project’s module-resolution and runtime conventions; Babel’s documentation discusses it alongside TypeScript options such as allowImportingTsExtensions and rewriteRelativeImportExtensions. See the preset documentation before enabling it.
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.
