We also check if the ball has hit the edge of the screen, and if so, we reverse the x or y speed so that it bounces back.įinally, we set the left and top CSS properties of the ball to the new x and y position, and use requestAnimationFrame(animate) to continuously call the animate function, creating the animation effect of the bouncing ball. ![]() In the animate() function, we update the x and y position of the ball by adding the x and y speed to it. We then set up some variables for the x and y position of the ball, as well as the x and y speed. In the JavaScript file, we first grab the ball element from the HTML using document.getElementById("ball"). The CSS file styles the ball to be a red, circular shape with a width and height of 50px. The HTML file creates a div element with an id of “ball”, which will be used as the bouncing ball. If (x + 50 > window.innerWidth || x window.innerHeight || y Here is a working example of a bounce ball built using HTML + CSS and plain JavaScript − Ĭonst ball = document.getElementById("ball") Use CSS to style the ball and the canvas as desired. Use JavaScript to detect when the ball hits the edges and change its direction accordingly. ![]() Use JavaScript to move the ball across the canvas, bouncing it off the edges when it reaches them. Use JavaScript to create the ball as a shape (e.g. To build a bounce ball using HTML and JavaScript, you will need to do the following −Ĭreate an HTML file with a canvas element on which the ball will be drawn. Finally, we can use JavaScript to continuously update the position of the circle based on its velocity and add collision detection to change the velocity when it hits the edges of the canvas. ![]() Next, we will use JavaScript to draw a circle on the canvas and set its initial position and velocity. We will start by creating a canvas element in our HTML document using the canvas tag.
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