WebGL draws graphics
WebGL exposes accelerated graphics to the browser. HexGL and Astray use it for 3D scenes; Freeciv-web offers a WebGL client alongside its 2D option. If a menu works but a 3D view stays blank, investigate graphics support, asset failures and the selected quality setting.
WebAssembly runs compiled code
WebAssembly is a compilation target that can run alongside JavaScript. Emscripten is a toolchain used to bring existing native programs to the web; pelya’s OpenTTD port documents that build path. A .wasm module and its data files may arrive after the HTML page. A stopped download and a failed graphics context are different failures.
The two technologies can work together
WebGL and WebAssembly describe different parts of a game. One is not a newer replacement for the other. A compiled game can render through browser graphics APIs, while a JavaScript game can use WebGL without a WebAssembly module. The title “HTML5 game” alone tells you little about a specific build’s requirements.
Match the symptom to the next check
For a stuck loading indicator, check the game’s status notice and data download. For an empty 3D scene after a working menu, try lower quality and another current browser. For a responsive scene with ignored keys, focus the game and read its input help. Keep the game URL, browser version and exact visible error when reporting a problem.
