CloudInvaders/shooting_pad.js

const keys = {};

document.addEventListener('keydown', (e) => {
    keys[e.key] = true;
});
document.addEventListener('keyup', (e) => {
    keys[e.key] = false;
});

class ShootingPad extends Entity {
    constructor() {
        super(0.5, 0.95, 0.04, 0.03);
        this.element.className = 'shooting-pad';
        this.lastShootTime = Date.now();
    }

    update() {
        if (keys['ArrowLeft']) {
            this.x -= VELOCITY[0] * 2;
        }
        if (keys['ArrowRight']) {
            this.x += VELOCITY[0] * 2;
        }
        if (this.x < X_BOUND) {
            this.x = X_BOUND;
        }
        if (this.x > 1 - X_BOUND) {
            this.x = 1 - X_BOUND;
        }
        if (keys[' '] && Date.now() - this.lastShootTime >= 300) {
            this.lastShootTime = Date.now();
            const bullet = new Bullet(this.x, this.y - 0.009);
            bullets.add(bullet);
        }
    }
}