KAPLAY
KAPLAY is a JavaScript library that helps you make games fast and fun!
Start playing around with it in the KAPLAYGROUND
Examples
// initialize context
kaplay();
// define gravity
setGravity(2400);
// load a sprite called "bean"
loadSprite("bean", "sprites/bean.png");
// compose the player game object from multiple components and add it to the game
const bean = add([
sprite("bean"),
pos(80, 40),
area(),
body(),
]);
// press space to jump
onKeyPress("space", () => {
// this method is provided by the "body" component above
bean.jump();
});
KAPLAY uses a powerful component system to compose game objects and behaviors.
// add a game obj to the scene from a list of component
const player = add([
// it renders as a sprite
sprite("bean"),
// it has a position
pos(100, 200),
// it has a collider
area(),
// it is a physical body which will respond to physics
body(),
// it has 8 of health
health(8),
// or give it tags for easier group behaviors
"player",
"friendly",
// plain objects fields are directly assigned to the game obj
{
dir: vec2(-1, 0),
dead: false,
speed: 240,
},
]);
Blocky imperative syntax for describing behaviors
// .onCollide() comes from "area" component
player.onCollide("enemy", () => {
// .hurt() comes from "health" component
player.hurt(1);
});
// check fall death
player.onUpdate(() => {
if (player.pos.y >= height()) {
destroy(player);
gameOver();
}
});
// if 'player' onCollide with any object with tag "enemy", run the callback
player.onCollide("enemy", () => {
player.hp -= 1;
});
// all objects with tag "enemy" will move towards 'player' every frame
onUpdate("enemy", (e) => {
e.move(player.pos.sub(e.pos).unit().scale(e.speed));
});
// move up 100 pixels per second every frame when "w" key is held down
onKeyDown("w", () => {
player.move(0, 100);
});
Usage
Start a Project With create-kaplay
The fastest way to start a KAPLAY game is with
create-kaplay
$ npx create-kaplay mygame
This will create a directory called mygame
for you, containing all the files
we need
$ cd mygame
$ npm run dev
Then open http://localhost:5173 and edit src/game.js
Install as NPM Package
$ npm install kaplay
import kaplay from "kaplay";
kaplay();
add([
text("oh hi"),
pos(80, 40),
]);
also works with CommonJS
const kaboom = require("kaplay");
Note that you'll need to use a bundler like esbuild
or webpack
to use KAPLAY
with NPM
Browser CDN
This exports a global kaplay
function
<script src="https://unpkg.com/kaplay@3000.1.17/dist/kaboom.js"></script>
<script>
kaplay()
</script>
or use with es modules
<script type="module">
import kaplay from "https://unpkg.com/kaplay@3000.1.17/dist/kaboom.mjs"
kaplay()
</script>
works all CDNs that supports NPM packages, e.g. jsdelivr, skypack
Documentation
- v3001: https://kaplayjs.com/
- v3000: https://kaboomjs.com/
- v2000: https://2000.kaboomjs.com/
- v0.5.0: https://legacy.kaboomjs.com/
Community
Games
Collections of games made with KAPLAY (and Kaboom), selected by KAPLAY:
Credits
- Thanks to tga for all his work on the original Kaboom.js
- Thanks to mulfok for the amazing mulfok32 color palette, used in KAPLAY sprites and art in general
- Thansk to Kenney for all used assets for examples
- Thanks to abrudz for the amazing APL386 font
- Thanks to Polyducks for the amazing kitchen sink font font
- Thanks to 0x72 for the amazing Dungeon Tileset
- Thanks to Kenney for the amazing 1-Bit Platformer Pack