HTML Canvas Graphics

HTML Canvas is an HTML element that allows you to draw graphics, animations, and other visual effects on a web page using JavaScript. It provides a powerful set of APIs for creating and manipulating shapes, text, images, and colors.

Here are some of the basic concepts of working with HTML Canvas graphics:

1. Canvas element: The HTML Canvas element is used to create a drawing surface on a web page.

<canvas id="myCanvas" width="500" height="500"></canvas>

2. Context: The canvas context is an object that provides methods and properties for drawing on the canvas. You can get the context of a canvas using the getContext() method.

let canvas = document.getElementById('myCanvas');
let ctx = canvas.getContext('2d');

3. Shapes: You can draw basic shapes like rectangles, circles, and lines on the canvas using methods like fillRect(), strokeRect(), arc(), and lineTo().

// Draw a rectangle
ctx.fillStyle = 'blue';
ctx.fillRect(50, 50, 100, 100);

// Draw a circle
ctx.beginPath();
ctx.arc(250, 250, 50, 0, 2 * Math.PI);
ctx.stroke();

4. Text: You can also draw text on the canvas using the fillText() or strokeText() methods.

ctx.font = '30px Arial';
ctx.fillStyle = 'red';
ctx.fillText('Hello, world!', 200, 200);

5. Images: You can load images onto the canvas using the HTMLImageElement and the drawImage() method.

let img = new Image();
img.src = 'myImage.png';
img.onload = function() {
  ctx.drawImage(img, 0, 0);
};

These are just a few of the basic concepts of HTML Canvas graphics. With the canvas element and its APIs, you can create complex animations, games, and visualizations on the web.