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What Is Phaser

Aug 13, 2026•7 min read

Phaser 4: What It Is and How to Use It in React.js / Next.js

If you’ve ever wanted to build a browser game — from a simple platformer to a full 2D world with physics, particles, and lighting — chances are you’ve bumped into Phaser. It’s one of the most popular open-source HTML5 game frameworks out there, and it just received its biggest update ever: Phaser 4.

In this post, I’ll cover what Phaser actually is, what’s new in version 4, and then walk through a clean, production-ready way to drop a Phaser game inside a React or Next.js app.

What Is Phaser?

Phaser is a free, open-source JavaScript/TypeScript framework for building 2D games that run in the browser (and, via wrappers, on mobile and desktop too). It’s been in active development for over a decade, created by Richard Davey and maintained by Phaser Studio, and it’s been used to ship everything from game-jam prototypes to full commercial titles.

Out of the box, Phaser gives you:

  • A scene system for organizing game states (menu, level, game over, etc.)
  • Physics engines (Arcade Physics, Matter.js)
  • Sprites, tweens, cameras, particles, and animations
  • Input handling for keyboard, mouse, touch, and gamepad
  • Asset loading for images, spritesheets, audio, and tilemaps
  • Automatic switching between Canvas and WebGL rendering depending on browser support

Basically, it’s everything you’d need to build a 2D game without writing your own renderer or physics engine from scratch.

What’s New in Phaser 4

Phaser 4 isn’t a rewrite from the ground up — the public API is largely the same as Phaser 3, so existing knowledge carries over. But under the hood, it’s a massive overhaul, described by the team as the biggest release in the framework’s history. The highlights:

  • A brand-new WebGL renderer. The old pipeline system from v3 has been replaced with a node-based render architecture, where each render node handles one job. This makes the renderer faster, more reliable, and easier to extend, and it properly manages WebGL state and context loss.
  • A unified Filter system. FX and Masks from v3 have been merged into one Filter system you can apply to any game object or camera, with built-in effects like Blur, Glow, Shadow, Pixelate, Bloom, Vignette, and more.
  • SpriteGPULayer. A new way to render huge numbers of sprites — up to a million in a single draw call — dramatically faster than standard rendering.
  • Improved lighting, including self-shadows, with an API as simple as sprite.setLighting(true).
  • Big mobile performance gains, including major reductions in memory usage from an overhauled buffer system for filters and masks.
  • AI-agent-friendly tooling. The Phaser repo ships with dozens of “skill” files documenting every subsystem, plus a dedicated v3-to-v4 migration skill, meant to help AI coding assistants generate correct, idiomatic Phaser 4 code.

If you’re on Phaser 3, the team provides a full migration guide, since there are some breaking changes (renderer internals, the tint system, the FX/Mask API, and a few removed classes).

Using Phaser 4 in React or Next.js

Phaser wasn’t designed with React in mind — it wants to own a <canvas> element and run its own game loop. React wants to own the DOM and re-render declaratively. The trick to combining them is simple: let Phaser manage its own canvas inside a container div, and use React only to mount/unmount that container. Don't try to make Phaser "reactive" — treat it as an imperative library React just happens to host.

1. Install Phaser

npm install phaser

2. Create the Phaser game instance in its own file

Keep your Phaser config and scene logic separate from your React components. This keeps things clean and makes the code portable.

// game/MainScene.js
import Phaser from "phaser";
export class MainScene extends Phaser.Scene {
  constructor() {
    super("MainScene");
  }
  preload() {
    this.load.image("logo", "/assets/logo.png");
  }
  create() {
    this.add.image(400, 300, "logo");
    this.tweens.add({
      targets: this.children.list[0],
      y: 350,
      duration: 1000,
      ease: "Sine.easeInOut",
      yoyo: true,
      repeat: -1,
    });
  }
}
// game/config.js
import { MainScene } from "./MainScene";
export const createGameConfig = (parent) => ({
  type: Phaser.AUTO,
  width: 800,
  height: 600,
  parent,
  scene: [MainScene],
  physics: {
    default: "arcade",
    arcade: { gravity: { y: 0 } },
  },
});

3. Wrap it in a React component

This is the key piece. Use a ref for the container div, and create/destroy the Phaser game inside useEffect.

// components/PhaserGame.jsx
"use client"; // only needed in Next.js App Router
import { useEffect, useRef } from "react";
import Phaser from "phaser";
import { MainScene } from "@/game/MainScene";
export default function PhaserGame() {
  const gameRef = useRef(null);
  const containerRef = useRef(null);
  useEffect(() => {
    if (gameRef.current) return; // avoid double-init in React StrictMode
    gameRef.current = new Phaser.Game({
      type: Phaser.AUTO,
      width: 800,
      height: 600,
      parent: containerRef.current,
      scene: [MainScene],
      physics: {
        default: "arcade",
        arcade: { gravity: { y: 0 } },
      },
    });
    return () => {
      gameRef.current?.destroy(true);
      gameRef.current = null;
    };
  }, []);
  return <div ref={containerRef} />;
}

A few things worth calling out:

  • useRef instead of useState for the game instance — you never want Phaser's existence to trigger a React re-render.
  • Cleanup in the useEffect return function is essential. Without game.destroy(true), you'll leak WebGL contexts and get "duplicate canvas" bugs, especially in dev mode with hot reloading.
  • The if (gameRef.current) return guard protects against React 18's StrictMode, which intentionally double-invokes effects in development.

4. Handling Next.js and SSR

Phaser touches window and other browser-only APIs, so it can't run during server-side rendering. In the App Router, the "use client" directive at the top of the component (shown above) is usually enough, since the actual Phaser code only runs inside useEffect, which never executes on the server.

If you still hit SSR errors (common with some Phaser plugins or if you import Phaser at the top of a page instead of inside a client component), load the game component dynamically with SSR disabled:

// app/game/page.jsx
import dynamic from "next/dynamic";
const PhaserGame = dynamic(() => import("@/components/PhaserGame"), {
  ssr: false,
});
export default function GamePage() {
  return <PhaserGame />;
}

5. Talking between React and Phaser

Eventually you’ll want your React UI (score displays, menus, modals) to communicate with the game. The cleanest way is Phaser’s built-in EventEmitter, rather than trying to pass React props into game objects.

// inside a Phaser Scene
this.events.emit("score-updated", newScore);
// in your React component
useEffect(() => {
  const scene = gameRef.current?.scene.getScene("MainScene");
  const handleScore = (score) => setScore(score);
  scene?.events.on("score-updated", handleScore);
  return () => scene?.events.off("score-updated", handleScore);
}, []);

This keeps Phaser and React loosely coupled — Phaser doesn’t know React exists, and React just listens for events.

Example Projects to Learn From

If you want to see these patterns in real codebases rather than isolated snippets, here are two community repos worth cloning:

  • React.js example: Phaser-React-Games by mirbasit01 — a set of small Phaser games wired into plain React (Create React App style), useful for seeing the container-div + useEffect pattern applied across multiple game examples.
  • Next.js example: if you’re looking for a Next.js starter, the official phaserjs/template-nextjs is the safest bet — it’s maintained by the Phaser team and already includes a React-to-Phaser event bridge, hot reloading, and production build scripts. (Note: the “Gamivox” repo you linked — hamzaAli0108/Gamivox — returned a 404, so it looks like it may have been renamed, deleted, or made private. Double-check the URL, and I'm happy to look at it once it's accessible.)

Wrapping Up

Phaser 4 is a huge step forward for browser-based game development: a rebuilt renderer, unified filters, GPU-driven sprite batching, and meaningful mobile performance gains, all while keeping the API you already know. Dropping it into React or Next.js comes down to one principle: let Phaser own the canvas, and let React just mount and unmount the container. Once that boundary is set up cleanly with refs and useEffect, you get the best of both — React for your app shell and UI, Phaser for the game itself.

From here, a natural next step is wiring up Arcade Physics for collisions, loading a tilemap for a real level, or trying out Phaser 4’s new lighting and filter effects on your sprites.

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