Starter code for displaying a unit circle in html canvas

UnitCircle.js

// Written by German Adrian Hoyos
// Linkedin: https://www.linkedin.com/in/adrian-i-81a32615b/
console.log("Base_Unit_Circle");

var canvas = document.querySelector("canvas");
var c = canvas.getContext('2d');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;

let up = false;
let down = false;
let left = false;
let right = false;
let accelerate = false;

const FRICTION = 0.7;
const FPS = 30;

window.addEventListener("keydown", keyDown); //lowercase in ""
window.addEventListener("keyup", keyUp);     //lowercase in ""

function keyDown(e) { //camelCase in call
    console.log(e.keyCode);
    if (e.keyCode == 68 || e.keyCode == 39) {
        console.log("right");
        right = true;
    }
    if (e.keyCode == 65 || e.keyCode == 37) {
        console.log("left");
        left = true;
    }
    if (e.keyCode == 87 || e.keyCode == 38) {
        console.log("foward");
        accelerate = true;
    }
    if (e.keyCode == 83 || e.keyCode == 40) {
        console.log("reverse");
    }
}

function keyUp(e) { //camelCase in call
    if (e.keyCode == 68 || e.keyCode == 39) {
        console.log("right release");
        right = false;
    }
    if (e.keyCode == 65 || e.keyCode == 37) {
        console.log("left release");
        left = false;
    }
    if (e.keyCode == 87 || e.keyCode == 38) {
        console.log("foward release");
        accelerate = false;
    }
    if (e.keyCode == 83 || e.keyCode == 40) {
       console.log("reverse release");
    }
}

class UnitCircleClass {
    //Class constructor to receive in params
    constructor(x, y, radius, selectBehaviour) {
        this.x =            x;                      //this objects center x pos
        this.y =            y;                      //this objects center y pos
        this.radius =       radius;                 //this objetcs radius
        this.angle =        90 / 180 * Math.PI;     //this objects angle converted to degrees
        this.accl_angle =   0 / 180 * Math.PI;      //this objetcs accelleration angle converted to degrees
        this.rotation =     .017;                   //a single degree reference conversion
        this.turn_speed =   .5;                      //amount of turn of this.angle
        this.accl_speed =   3;                      //amount of change for (x/y)
        this.accelerate =   false;                  //bool
        this.vectorX =      0;                      //reference for changing this.x
        this.vectorY =      0;                      //reference for changing this.y
        this.behavior =     selectBehaviour;        //chose acceleration type;
        this.UsrControlled= false;                  //0
        this.AiControlled = false;                  //1
    }

    //behavior of movement of this object
    selectBehaviour(){
        if(this.behavior == 0){
            this.UsrControlled = true; //console.log('Usr Controlled Object ' + this.UsrControlled);
        }
        if(this.behavior == 1){
            this.AiControlled = true; //console.log('Ai Controlled Object ' + this.AiControlled);
            accelerate = true;
        }
    }

    //calculate unit circle
    arcRender() {
        //console.log('arcRender called');
        c.beginPath();
        c.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
        c.strokeStyle = 'white';
        c.stroke();
    }

    //calculate initial/desired angle
    calcAngle() { //green (actual force applied)
        c.beginPath();
        c.moveTo(this.x, this.y);
        c.lineTo(
            this.x + this.radius * Math.cos(this.angle),
            this.y - this.radius * Math.sin(this.angle)            
        );
        c.closePath();
        c.stroke();
    }

    //calculate accelleration angle
    calcAccl() { //red (actual vector derived)
        c.beginPath();
        c.moveTo(this.x, this.y);

        c.lineTo(
            this.x + this.radius * Math.cos(this.accl_angle),
            this.y - this.radius * Math.sin(this.accl_angle)
        );
        c.closePath();
        c.stroke();
    }

    aiControl(){
        if (this.AiControlled == true) {
            this.angle += .017 * this.turn_speed;
            
        }
    }

    //rotate this.angle clockwise
    rotateRight() {
        if (right == true && this.UsrControlled == true) {
            this.angle -= this.rotation * this.turn_speed * 2;            
        }
    }

    //rotate this.angle counter clockwise
    rotateLeft() {
        if (left == true && this.UsrControlled == true) {
            this.angle += this.rotation * this.turn_speed * 2;           
        }
    }
    
    //apply an accelleration force in the direction of this.angle
    accell() { //0
        if (accelerate == true) {
            this.vectorX += this.accl_speed * Math.cos(this.angle) / FPS;
            this.vectorY -= this.accl_speed * Math.sin(this.angle) / FPS;
        } else {
            this.vectorX -= FRICTION * this.vectorX / FPS;
            this.vectorY -= FRICTION * this.vectorY / FPS;
        }
        this.x += this.vectorX;
        this.y += this.vectorY;

        //visually snaps both angles together
        if (accelerate == true) {
            this.accl_angle = this.angle - 180 * Math.PI
        }

    }

    //Render circle in canvas
    draw() {
        this.selectBehaviour();
        this.arcRender();
        
        c.restore();
        c.save();
            c.strokeStyle = 'green';
            this.calcAngle();
        c.restore();
        c.save();
        
        c.restore();
        c.save();
            c.strokeStyle = 'red';
            this.calcAccl();
        c.restore();
        c.save();

        this.accell();
        this.aiControl();
        this.rotateRight();
        this.rotateLeft();
    }
}

var underlay = new UnitCircleClass(innerWidth / 2, innerHeight / 2, 150, 0);

function drawIf() {
    underlay.draw();
}

function animate() {
    requestAnimationFrame(animate);
    c.clearRect(0, 0, innerWidth, innerHeight);
    drawIf();
}

animate(); // for my son - c u soon kiddo!