Example 1: javascript canvas
<canvas id="canvas"></canvas>
<script>
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.rect(x, y, width, height);
ctx.fillStyle = 'limegreen';
ctx.fill();
ctx.beginPath();
ctx.arc(x, y, radius, startAngle, endAngle, counterClockWise(optional));
ctx.strokeStyle = 'black';
ctx.stroke();
</script>
Example 2: javascript create canvas
var canvas = document.createElement("canvas"); //Create canvas
document.body.appendChild(canvas); //Add it as a child of <body>
Example 3: canvas nodejs
const { createCanvas, loadImage } = require('canvas')const canvas = createCanvas(200, 200)const ctx = canvas.getContext('2d') // Write "Awesome!"ctx.font = '30px Impact'ctx.rotate(0.1)ctx.fillText('Awesome!', 50, 100) // Draw line under textvar text = ctx.measureText('Awesome!')ctx.strokeStyle = 'rgba(0,0,0,0.5)'ctx.beginPath()ctx.lineTo(50, 102)ctx.lineTo(50 + text.width, 102)ctx.stroke() // Draw cat with lime helmetloadImage('examples/images/lime-cat.jpg').then((image) => { ctx.drawImage(image, 50, 0, 70, 70) console.log('<img src="' + canvas.toDataURL() + '" />')})
Example 4: javascritp canvas
//Creates a canvas and draws a circle
var canvas = document.body.appendChild(document.createElement("canvas"));
var ctx = canvas.getContext("2d");
ctx.beginPath();
ctx.arc(canvas.width / 2, canvas.height / 2, 50, 0, Math.PI * 2);
ctx.fillStyle = "red";
ctx.strokeStyle = "black";
ctx.stroke();
ctx.fill();
Example 5: javascript canvas
#this code creates a circle within a canvas that must be created in HTML
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.arc(95, 50, 40, 0, 2 * Math.PI);
ctx.stroke();
Example 6: canvas in javascript
<!DOCTYPE HTML>
<html>
<head>
<style>
#mycanvas{border:1px solid red;}
</style>
</head>
<body>
<canvas id = "mycanvas" width = "100" height = "100"></canvas>
</body>
</html>