MediaExplorer 0.55.30 - dev branch

What Is This?

MediaExplorer is a hobby browser for Windows 10 Mobile (W10M, build 15063+) built without the system WebView or Chakra engine. It uses a custom HTML parser, CSS engine with selectors/cascade/flexbox, a JavaScript runtime powered by NiL.JS, and a XAML-based renderer.

~35 files, ~20k+ lines of code. Pre-alpha. Museum-grade.

Screenshots

Features

• Custom rendering engine — HTML parser, CSS cascade, flexbox, XAML renderer
• JavaScript — NiL.JS runtime with ES Modules support (Vite bundles parse; D3v4/v5 support)
• DevTools — Console, DOM inspector, Network tab, Debug log
• 3 UI modes — Hided (strip), Semi (expandable), Full (standard app bar)
• 3 render modes — Full (JS+CSS), Rich (CSS, no JS), Poor (plain text)
• Disk cache — Resource caching with priority queue
• MutationObserver — Incremental re-render on DOM changes
• Snapshot button — Screenshot (single or full-page) saved to Pictures/MediaExplorer
• Keyboard shortcuts — Ctrl+L (focus URL), Ctrl+B (toggle bar)

Status

• Pre-alpha. All features are highly unfinished.
• NiL.JS 2.6 Integration (netstandard2.0 → 1.4) | ✅ DONE (fully builds for W10M 15063)

This is a homemade browser engine — not production-ready, not intended to replace Edge or Chrome. It exists to prove that you don't need Chromium to render a webpage.

Milestones

• 2026.06.07 — v0.55.0 D3.js force-directed graph (Nokia Design Archive) renders as live XAML shapes — no Skia, no SvgImageSource, no WebView. SVG elements (circle, line, rect, path, text, g) map to native UWP UIElement descendants (Ellipse, Line, Rectangle, Path, TextBlock, Canvas) in the VirtualizingRenderer pipeline with style cascading (fill, stroke, stroke-width, opacity) and viewBox scaling.
• 2026.06.05 — v0.50.0 First successful d3.js evaluation on UWP via NiL.JS: force simulation initialises, tick function fires, DOM SVG nodes created. Known limitation at this point: D3 DOM output not yet rendered to screen (solved in v0.55).
• 2026.05.xx — v0.42.8 NiL.JS runtime ported from netstandard2.0 to .NET Native 1.4 (W10M 15063-compatible). ES Modules parsing support added. MutationObserver implemented.

Known Issues

• Source is AI-generated ("neuro-slop"), except the original UDAIE-A WebView code
• Not tested on any W10M device
• White screen on some sites (dzen.ru, ya.ru)
• ES Modules runtime errors still being fixed
• Private fields (#name) not supported

Credits

• UDAIE-A/WEBVIEW — Original WebView for Windows Phone 8.1
• NiL.JS — JavaScript engine

Docs

See /Doc folder for development plans and session summaries.

Contributing

Calling all retro-computing enthusiasts! If you still have a Lumia 950/1020 gathering dust, or you just love the idea of a browser that doesn't need 2 GB of Chromium to open a webpage — this project needs you.

• Developers: Fork, fix, PR. The codebase is messy but honest. Every line was fought for.
• W10M testers: Try it on your device, report what breaks. Your hardware is the real test bench.
• CSS/JS nerds: If you know why calc(100% - 16px) doesn't work here — you already know what to do.

Issues & Bug Reports

Found a site that renders wrong? Crashed on your phone? Have a feature request?

→ Open an Issue

Include: URL, what you expected, what you got. Screenshots help.

---

As is. No support. RnD only. DIY.

[m][e] June 08, 2026