iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Baseline 2026 makes 16 entries in its JavaScript and Web APIs section newly relevant to evaluate—not an automatic reason to remove dependencies. This guide selects 13 of those entries that are concrete candidates for application-level use, while leaving out three specialized entries: JavaScript modules in shared workers, Branch hinting (WebAssembly), and Zstandard compression. The selection is a practical scope, not an official ranking or the complete Baseline list.
Baseline 2026 is still developing, so the list may change. More importantly, Baseline describes browser availability, not whether a native feature matches a library’s scope or meets a project’s accessibility, security, performance, and fallback requirements.
What does Baseline 2026 actually tell you?
Baseline is a summary of browser support. — MDN Web Docs, Baseline (compatibility)
MDN’s Baseline definition covers Apple Safari on iOS and macOS, Chrome on Android and desktop, Edge on desktop, and Firefox on Android and desktop. “Newly available” means support in the latest stable versions of the core browsers; it does not promise support on older browsers or devices. “Widely available” indicates a consistent support history of at least 2.5 years. web.dev describes the latter threshold as 30 months after the newly interoperable date.
#1 Best Overall
The official Baseline 2026 page calls 2026 the latest and currently developing feature set. Its JavaScript and Web APIs section currently lists 16 entries. HTML and CSS features appear in separate groups and are not included here.
Use a Baseline label as a prompt to check whether a feature can be used for a specific audience—not as proof of broad device coverage or as a verdict on quality. Baseline does not establish accessibility, usability, performance, security, or assistive-technology support.
Which 13 APIs are worth evaluating first?
This selection focuses on capabilities that can affect common application logic, events, workers, navigation, streams, and security policy. Inclusion means “evaluate for your use case,” not “this replaces a library.” The official membership labels are retained below.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors-
Intl.Locale infoEvaluate it when locale-aware interfaces need locale information. Whether it removes a dependency depends on what that dependency does; Baseline status alone does not establish equivalent coverage or behavior.
Rank #2
Sale
HTML and CSS: Design and Build Websites- HTML CSS Design and Build Web Sites
- Comes with secure packaging
- It can be a gift option
-
ToggleEvent sourceConsider it when handling toggle events and the event’s source is relevant to application behavior. Check the exact event semantics and the interaction patterns your interface supports.
-
Shared worker
Shared workers are one of the listed entries. Check whether a shared worker fits your coordination needs and deployment environment before replacing another approach.
-
Math.sumPrecise()Evaluate this when summing numbers and precision behavior matters. Confirm that its semantics fit the values and calculations in your application rather than assuming it is interchangeable with every numeric helper.
Recommended Free Tools
Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
Iterator.concat()Consider it when concatenating iterators. A library may do more than combine iterators, so compare the actual operation and edge cases you rely on.
Rank #3
-
Readable byte streams
These may be relevant when working with readable streams of bytes. Check how the native stream model fits the source, transformations, and consumers in your application.
-
Reporting API
Evaluate it if your site needs browser-generated reports. Identify the report types, delivery path, and operational handling your project requires before deciding whether another reporting component is unnecessary.
-
CSP violation reports
These reports can be relevant to a Content Security Policy workflow. Check how reports are generated, received, and used in your environment; support for the feature does not itself provide a complete monitoring system.
Outdated 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 matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
WebTransport
Evaluate it for transport needs that fit its capabilities and your browser-support requirements. Baseline does not establish that it is a drop-in replacement for a particular networking library or protocol.
Rank #4
Sale
Web Design with HTML, CSS, JavaScript and jQuery Set- Brand: Wiley
- Set of 2 Volumes
- A handy two-book set that uniquely combines related technologies Highly visual format and accessible language makes these books highly effective learning tools Perfect for beginning web designers and front-end developers
-
Trusted types
Consider Trusted Types when reviewing how your application handles potentially unsafe values and its content security policy. It is a security-related platform feature, not a substitute for a complete security review or a guarantee that an application is safe.
-
Map getOrInsert()Evaluate it if your code frequently gets or inserts values in a map. Check the method’s behavior against the helper or abstraction you currently use.
-
JavaScript modules in service workers
Consider this entry when organizing service-worker code as modules. Check the deployment and browser requirements of your site, along with any assumptions made by existing tooling.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
Navigation API
Evaluate it when an application needs to work with browser navigation. Compare the API’s role with your routing and history needs; Baseline membership does not show that it covers every feature of a routing library.
Why not treat these 13 as a replacement checklist?
A feature and a library are not automatically equivalent. A library may provide compatibility code, abstractions, multiple capabilities, or behavior specific to your application. The Baseline pages establish browser-support grouping and stages; they do not establish a one-for-one replacement, adoption rate, performance gain, or reduced maintenance cost for any particular project.
Before removing a dependency, compare the actual feature surface you use, browser and older-device support, fallback behavior, accessibility and security implications, and the cost of implementing and maintaining the native path. Make performance or bundle-size claims only when they are measured for your own build.
How to decide whether to adopt a native API
- Identify the dependency’s actual job. List the features and edge cases your application uses, rather than comparing package names.
- Check the exact API’s current support. Start with the web.dev Baseline overview and the API’s compatibility information. Verify the browsers and older devices your audience uses.
- Choose a fallback deliberately. If your support targets include browsers without the feature, decide whether to retain the library, provide another fallback, or accept reduced functionality.
- Review non-compatibility requirements. Test the feature’s behavior for your accessibility, usability, security, and assistive-technology needs; a Baseline label does not answer those questions.
- Compare the implementation you would ship. Account for the native code, fallback, and maintenance involved. Do not assume a smaller dependency tree or faster runtime without evidence from your project.
- Make the change reversible. Replace one use case at a time and validate the result against the behaviors your application depends on.
web.dev’s Baseline overview also describes checking feature status and integrating Baseline into development workflows. Compatibility tooling can help surface support information, but it does not replace testing your application’s complete behavior.
Free tools Windows power users keep installed
One-click scans. No signup required.
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.
