Endel Dreyer endel

Colyseus Games — @levelsio Vibe Jam 2026

Multiplayer games built with Colyseus, ranked by likes on each developer's most-liked video tweet from the last 30 days.

48 games — generated 2026-05-08.

#	Preview	Game	Developer	Likes	Video
1		Hollowlands	@andreeliasdev	797	watch
2		Mafia City	@davidbmadsen	209	[watch](https://x.com/

Alternatively, use esbuild and tsc through the CLI to generate both CJS and ESM outputs: https://dev.to/endel/nodejs-package-authors-please-support-both-cjs-and-esm-1oj3

Hi everybody! Regarding the possible new schema callback API, so far this is what I could came up so far, feedback highly appreciated! Do let me know if you feel I need to clarify anything!

I understand this may be long and hard to grasp, I can provide a side-by-side comparison between the new API and previous one so you can clearly see the difference.

The new API would allow to create all the callbacks at once, after the connection with the room has been established (even on deep structures) - rather than binding callbacks as Schema instances that are created on-demand on the client-side.

Structures:

class Point extends Schema {

	import fs from "fs";
	import { Schema, Reflection } from "@colyseus/schema";

	// ...
	class MyRoom extends Room {
	// ...

	onCreate() {
	fs.writeFileSync("patch-debug.log", "");

	processor : 0
	vendor_id : GenuineIntel
	cpu family : 6
	model : 60
	model name : Intel Core Processor (Haswell, no TSX, IBRS)
	stepping : 1
	microcode : 0x1
	cpu MHz : 2394.454
	cache size : 16384 KB
	physical id : 0

	processor : 0
	vendor_id : GenuineIntel
	cpu family : 6
	model : 85
	model name : Intel Xeon Processor (Cascadelake)
	stepping : 6
	microcode : 0x1
	cpu MHz : 2893.194
	cache size : 16384 KB
	physical id : 0

	processor : 0
	vendor_id : GenuineIntel
	cpu family : 6
	model : 94
	model name : Intel Core Processor (Skylake, IBRS)
	stepping : 3
	microcode : 0x1
	cpu MHz : 3695.998
	cache size : 16384 KB
	physical id : 0

	room.onStateChange.once(function() {
	function registerCallbacksOnStructure (schemaInstance, path) {
	const schema = schemaInstance['_definition'].schema;
	for (let field in schema) {
	const schemaType = typeof(schema[field]);

	if (schemaType === "object") {
	// on item added to collection
	schemaInstance[field].onAdd(function (item, key) {
	onItemAdd([...path, field], item, key);

	// Based on: http://breinygames.blogspot.com/2011/07/random-map-generation.html

	// Needs improvment:
	// - It is possible with small rooms for it to not be closed (i.e. a wall tile missing)
	// - Walls often double up (more room spacing?)

	var RoomMaze = srm = {
	generate: function(gridSize, minRoomSize, maxRoomSize, maxRooms) {
	// 1) Create the grid
	var grid = [];