Another keyboard listener

index.js

class BooleanicKeys {
    constructor(obj, element = window) {
        element.addEventListener('keyup', this.keyUp.bind(this), false);
        element.addEventListener('keydown', this.keyDown.bind(this), false);
        this.elememt = element
        this.keys = {}
        for (let key in obj) {
            this.keys[key] = {
                isDown: false,
                press: obj[key],
            }
        }
    }
    keyUp(e) {
        if (this.keys[e.code] && this.keys[e.code].isDown) {
            e.preventDefault()
            this.keys[e.code].isDown = false
        }
    }
    keyDown(e) {
        if (this.keys[e.code] && !this.keys[e.code].isDown) {
            e.preventDefault()
            this.keys[e.code].isDown = true
        }
    }
    update() {
        for(let key in this.keys){
            this.keys[key].isDown && this.keys[key].press()
        }
    }
    detach() {
        this.elememt.removeEventListener('keydown', this.keyDown, false)
        this.elememt.removeEventListener('keyup', this.keyUp, false)
    }
}
/*

const example = new BooleanicKeys({
  KeyW(){
    p.z += Math.cos(m.x) * p.speed
    p.x += Math.sin(m.x) * p.speed
  },
  KeyI:()=>{ p.stop(); p.openInv() }
  Space: p.shoot
})

const loop = ()=>{
  example.update()
}

example.detach()
*/