<p><strong>TLDR:</strong> Mozilla launched an experimental MDN MCP server that gives AI coding agents accurate, real-time browser compatibility data — early tests show Claude Code answering browser support questions correctly where it previously gave outdated answers. Flutter 3.44 and Dart 3.12 landed at Google I/O with WebAssembly rendering improvements (25–40% performance gains on web) and Dart Cloud Functions cold starts as low as 10ms. TanStack Virtual added end-anchored virtualization built specifically for chat and streaming UIs. Visual Studio 18.7 brings full PR review workflows inside the IDE without a browser tab.</p>
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<h2>MDN MCP server connects AI agents to live browser compatibility data</h2>
<p>Mozilla shipped an experimental MCP server that lets AI coding agents and IDEs pull directly from MDN’s documentation and browser compatibility data instead of relying on whatever the model memorized at training time. In testing, Claude Code with the MDN MCP correctly identified Firefox 151 as the first browser to ship <code>shadowrootslotassignment</code> and gave accurate Web Serial API support info — without it, the model returned outdated or wrong answers. Responses were also roughly twice as fast since the model skipped scraping HTML pages. Works today with VS Code, Cursor, Claude Code, Codex CLI, and Gemini CLI. <a href="https://app.daily.dev/posts/5lhSiUAtE" target="_blank" rel="noopener nofollow">Read more</a></p>
<h2>Flutter 3.44 and Dart 3.12 ship WebAssembly overhaul and 10ms cold starts</h2>
<p>Flutter 3.44 and Dart 3.12 landed at Google I/O with a WebAssembly render path overhaul delivering 25–40% performance gains on web. Dart Cloud Functions for Firebase now support AOT compilation with cold starts as low as 10ms. Other notable additions: primary constructors and private field initializers in Dart, agentic hot reload for AI coding agents, a Dart/Flutter MCP server, and iOS switching to Swift Package Manager by default with CocoaPods deprecated. Toyota is shipping Flutter in the 2026 RAV4 infotainment system. <a href="https://app.daily.dev/posts/tMBsTLaNK" target="_blank" rel="noopener nofollow">Read more</a></p>
<h2>TanStack Virtual adds end-anchored mode for chat and streaming UIs</h2>
<p>TanStack Virtual now supports <code>anchorTo: 'end'</code>, which stabilizes scroll position when prepending older messages — the classic problem that makes chat UIs jump around. <code>followOnAppend</code> keeps the viewport pinned to the latest message unless the user scrolls up, and streaming token output is handled correctly as the last message grows. New utility methods <code>isAtEnd()</code>, <code>getDistanceFromEnd()</code>, and <code>scrollToEnd()</code> give you the building blocks for a ‘Jump to latest’ button. A Chat guide and React example are included. <a href="https://app.daily.dev/posts/6tf8aLE1o" target="_blank" rel="noopener nofollow">Read more</a></p>
<h2>Visual Studio 18.7 adds full PR review workflow inside the IDE</h2>
<p>Visual Studio 18.7 lets you browse diffs, leave and reply to comments, resolve threads, and approve or merge PRs for both GitHub and Azure DevOps without leaving the IDE. You can review without checking out the branch to keep your working state clean, or check out for deeper investigation using VS navigation and debugging. Copilot integration can generate code fixes directly from review comments. Comment filtering and a PR activity timeline are still in progress. <a href="https://app.daily.dev/posts/nJdikgQCv" target="_blank" rel="noopener nofollow">Read more</a></p>
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<h2>Also notable</h2>
<ul>
<li><strong>react-call eliminates modal state boilerplate in React:</strong> react-call lets you invoke React components like async functions, removing open/close state variables, prop drilling, and context providers for modals, toasts, and confirmation dialogs. <a href="https://app.daily.dev/posts/EgsSq8h5Z" target="_blank" rel="noopener nofollow">Read more</a></li>
<li><strong>Eleventy migration of a 1,200-post site compressed to one week with Codex:</strong> A developer migrated a 20+ year old site with over 1,200 blog posts from Statamic to Eleventy using OpenAI Codex to handle Markdown conversion, legacy HTML integration, and URL redirects — work estimated at months done in about a week. <a href="https://app.daily.dev/posts/zW48YcGv8" target="_blank" rel="noopener nofollow">Read more</a></li>
</ul>


Frontend development news, CSS techniques, framework updates, and browser API changes.

Web Digest

A roundup of developer tooling news: Mozilla launched an experimental MDN MCP server giving AI coding agents real-time browser compatibility data, with Claude Code showing notably improved accuracy. Flutter 3.44 and Dart 3.12 arrived at Google I/O with a WebAssembly render overhaul delivering 25–40% web performance gains and 10ms cold starts for Dart Cloud Functions. TanStack Virtual added end-anchored virtualization for chat and streaming UIs. Visual Studio 18.7 brings full PR review workflows inside the IDE for GitHub and Azure DevOps. Also covered: react-call for modal state management and an Eleventy site migration using OpenAI Codex.

MDN gets an MCP server, Flutter 3.44 ships WebAssembly gains