Answers for developers, publishers and site owners on monetizing and distributing web games.
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Query the device's safe-area insets (top, bottom, left, right in pixels) and pad or reposition HUD elements so nothing sits under a notch, rounded corner or platform UI. Recompute on orientation change and window resize.
Track elapsed time each frame with requestAnimationFrame, add it to an accumulator, and run your update function in a while loop at a fixed dt (e.g. 1/60s) until the accumulator drops below dt. Render once per frame using the remaining fraction to interpolate positions, so physics stays deterministic regardless of frame rate.
Use the ws library (a popular WebSocket client and server implementation for Node.js) rather than raw sockets. Run an authoritative game loop on the server, broadcast state diffs over open connections, and handle disconnects and malformed messages explicitly - the client should never be trusted for game logic.
Use WebSockets when a server holds authoritative game state and you need wide browser support with minimal setup. Use WebRTC data channels for peer-to-peer connections, or when you need unordered/unreliable delivery for fast-twitch sync, at the cost of a harder connection setup (signaling, STUN/TURN).
Run npm create vite@latest, pick the vanilla template (or vanilla-ts), then add Phaser as a dependency and import it in main.js. Vite gives you a dev server with hot reload and a build command that outputs static files any HTML5 host or SDK can load.
The core set is Canvas/WebGL for rendering, Web Storage (and IndexedDB) for saving progress, WebSockets for multiplayer, and the Ad Placement API (adBreak) for ads. Which ones you need depends on whether the game is 2D, needs a server, or needs to persist state.
Godot 4 web exports are limited to what browsers allow: HTTP/HTTPS requests and WebSocket connections work normally. Raw TCP and UDP sockets do not work in the browser, so Godot's low-level networking classes that depend on them are unavailable; multiplayer must go through WebSocket or WebRTC's data channel instead.
Unity's Web build target uses IL2CPP to convert C# code to C++ and then compiles it to WebAssembly with Emscripten, producing a .wasm file plus a JavaScript loader and HTML page that runs it in the browser.
Listen for the visibilitychange event (state 'hidden') and the pagehide event, then run your save function immediately and synchronously. Do not rely on beforeunload for mobile browsers. Save to storage that survives tab closure, not sessionStorage, and keep the write small and fast.
Validate and version every save on write and read, keep a migration function per version step, and reset to a fresh save when a file fails validation. For web exports, engines call browser storage differently, such as Unity WebGL using a .jslib plugin or Godot 4 using the JavaScriptBridge singleton, keeping save logic separate from tools like Playgama Ad or Playgama Bridge.