The web platform continues to move forward, and Baseline Newly Available is the key signal that a feature now works across the latest versions of Chrome, Edge, Firefox, and Safari.

In early 2026, the following features reached Baseline Newly Available and Widely Available status. Here’s a clean, month-by-month overview based on the official release notes, with links to MDN Web Docs for deeper reference.

Math font family
The font-family: math value lets you use the browser’s default math font for rendering mathematical formulas. Math fonts are designed for notation-heavy content, handling things like stacked and stretched operators, multi-level scripts, and special mathematical symbols.

Iterator.prototype.concat()
Iterator.prototype.concat() returns a new iterator that yields values from a sequence of iterators, one after another. It lets you concatenate multiple iterators without materializing all their values into arrays.

Readable byte streams
A ReadableStream constructed with { type: "bytes" } is a byte stream that efficiently reads raw binary data, often using a bring your own buffer (BYOB) pattern. This reduces copying and is ideal for large binary payloads like media or protocol streams.

Reporting API
The Reporting API allows web browsers to send detailed reports regarding security violations and browser errors directly to a configured server endpoint. The updated API simplifies this process by replacing the older Report-To header with the new Reporting-Endpoints header to define report destinations.

text-indent: each-line
The each-line keyword for text-indent applies indentation to the first line and every line following a forced break, such as a <br> element. It does not affect lines that wrap automatically due to container width constraints. Read the full documentation at MDN Web Docs.

text-indent: hanging
The hanging value for text-indent inverts normal indentation, leaving the first line flush while indenting all subsequent lines. This is commonly used for hanging punctuation and some typographic layouts. Read the full documentation at MDN Web Docs.

WebTransport API
The WebTransport API is a modern networking interface that enables low-latency, bidirectional communication between a client and an HTTP/3 server, supporting both reliable streams and unreliable datagrams. It acts as a high-performance alternative to WebSockets and offers improved flexibility for use cases like gaming or live streaming. Recent developments include broader browser support and tighter integration with the Streams API for enhanced flow control.

Map.prototype.getOrInsert()
Map.prototype.getOrInsert() and Map.prototype.getOrInsertComputed() method returns the value associated with a specified key if it exists in the Map. If the key is missing, it inserts a provided default value into the entry and returns that value

shape() CSS function
The shape() CSS function defines custom paths for clip-path and offset-path by using commands like move, line, and curve. As a newer alternative to the path()function, it allows for more readable syntax, direct use of CSS units, and math functions.

Trusted Types API
This security feature prevents DOM-based cross-site scripting (XSS) by requiring developers to use "Trusted Type" objects instead of plain strings when assigning values to dangerous "injection sinks" like innerHTML. It lets you create and enforce policies so that only values produced by approved sanitization functions can be used.This API is now officially part of the Baseline newly available across major browser engines.

Zstandard compression (zstd)
Zstandard (zstd) is a fast, lossless compression algorithm used for HTTP content encoding that provides high compression ratios and faster decompression than older formats like Gzip. It is now widely supported across modern browsers to improve site loading speeds.

Navigation API
The Navigation API is a modern replacement for the old History API, offering an event-driven way to intercept and manage browser navigations in single-page applications. It introduces the navigate event, which lets you handle application-specific routing and UI updates more reliably than popstate or hashchange.

rcap unit (container query length)
The rcap unit is a responsive length unit based on container queries. It expresses a percentage relative to a query container’s size, helping you create layouts that respond to the size of their container rather than the viewport. See CSS container queries for an overview of container-based length units.

rex unit
The rex unit is a font-relative CSS length equal to the x-height of the root element’s font. It’s useful when you want spacing or sizing that tracks the perceived height of lowercase letters rather than the full em box.

ric unit
The ric unit (root international character) is a font-relative CSS length based on the width of a typical ideographic (CJK) character in the root element’s font. It helps align designs to the metrics of East Asian typography.

Once a feature reaches Baseline Newly Available, it is supported in the current stable versions of all major browsers. That means you can start using it in production with confidence, adding light fallbacks for older browsers when necessary.

For the most accurate compatibility details, always refer to the linked MDN pages above or the Web Platform Features Explorer.

The web keeps getting more capable every month. Which of these new 2026 features do you think will be most useful for you?

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