JSFiddle - React, Tailwind, and code Playground

by Zecheng Hu

HTML

<canvas id="myCanvas" height="320" width="480"></canvas>

CSS

canvas { background: #eee; }

JavaScript

var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var ballRadius = 10;
var x = canvas.width/2;
var y = canvas.height-30;
var dx = 2;
var dy = -2;
var paddleHeight = 10;
var paddleWidth = 75;
var paddleX = (canvas.width-paddleWidth)/2;
var rightPressed = false;
var leftPressed = false;
var brickRowCount = 1;
var brickColumnCount = 5;
var brickWidth = 75;
var brickHeight = 20;
var brickPadding = 10
var brickOffsetTop = 20;
var brickOffsetLeft = 30;
var randomColor = 'rgb(' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ')';
var random = 'rgb(' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ')';
var Color = 'rgb(' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ')';
var i = 70;
var z = 45;

var bricks = [];
for(c=0; c<brickColumnCount; c++) {
    bricks[c] = [];
    for(r=0; r<brickRowCount; r++) {
        bricks[c][r] = { x: 0, y: 0 };
    }
}

document.addEventListener("keydown", keyDownHandler, false);
document.addEventListener("keyup", keyUpHandler, false);

function keyDownHandler(e) {
    if(e.keyCode == 39) {
        rightPressed = true;
    }
    else if(e.keyCode == 37) {
        leftPressed = true;
    }
}
function keyUpHandler(e) {
    if(e.keyCode == 39) {
        rightPressed = false;
    }
    else if(e.keyCode == 37) {
        leftPressed = false;
    }
}

function drawBall() {
    ctx.beginPath();
    ctx.arc(x, y, ballRadius, 0, Math.PI*2);
    ctx.fillStyle = "#123456";
    ctx.fill();
    ctx.closePath();
}
function drawPaddle() {
    ctx.beginPath();
    ctx.rect(paddleX, canvas.height-paddleHeight, paddleWidth, paddleHeight);
    ctx.fillStyle = randomColor;
    
    ctx.fill();
    ctx.closePath();
}
function drawBricks() {
    for(c=0; c<brickColumnCount; c++) {
        for(r=0;...