Strictly a proof-of-concept, js-ds was one of the earliest attempts. It is written in pure JavaScript (no Wasm). While it boots Super Mario 64 DS , it runs at roughly 15% speed. It is not suitable for actual gaming, but it is a marvel of programming and shows how far JS has come.
Just keep your expectations realistic. For deep, mic-dependent games, stick to original hardware or a native emulator. But for the 80% of the DS library that relies on buttons and touch, the browser is now the ultimate portable console. nintendo ds emulator js
is a fun tech demo and casual solution for trying out small DS games without installing anything. However, for a serious gaming experience, native emulators like MelonDS or DeSmuME (or even DraStic on Android) are vastly superior. If you just want to test a ROM quickly or show off emulation in a browser, go for it. Otherwise, skip the JS versions for now. Strictly a proof-of-concept, js-ds was one of the
For practical code examples and ready-to-use libraries, these projects are the gold standard: It is not suitable for actual gaming, but
Let's address the elephant in the room.
But how do these web-based emulators work? Are they legal? And most importantly, do they actually run fast enough to play ?