HTML 5 Canvas & SVG

 Ofir Fridman
 FE Developer
 Love code, technology, sport

 The HTML <canvas> element is
used to draw graphics
 The <canvas> element is only a
container for graphics. You must
use a script to actually draw the
graphics.
 Canvas has several methods for
drawing paths, boxes, circles, text,
and adding images.
 SVG stands for Scalable Vector
Graphics
 The HTML <svg> element is a
container for SVG graphics.
 SVG has several methods for
drawing paths, boxes, circles, text,
and graphic images.

Canvas SVG
Script - Drawing via code Document - Drawing via XML
Rendered pixel by pixel Scalable Vector Graphics
No support for event handlers Support for event handlers
Better performance Poor performance when to many
items

 Games
 Chart & Graphs
 Advertising
 Logos
 Chart & Graphs
 Icons

<canvas id="canvas">
This Browser Not Support
</canvas>
var canvasElement = document.getElementById("canvas");
var canvas = canvasElement.getContext("2d");
canvas.font = "50px arial";
canvas.fillText("Hello World", 10, 50);// (text, x, y)
canvas{
border:1px solid;
width: 50%;
height: 50%
}
HTML
JS
CSS

Paths
Method Description
fill() Fills the current drawing (path)
stroke() Actually draws the path you have defined
beginPath() Begins a path, or resets the current path
moveTo() Moves the path to the specified point in the canvas, without creating a
line
closePath() Creates a path from the current point back to the starting point
lineTo() Adds a new point and creates a line from that point to the last specified
point in the canvas
clip() Clips a region of any shape and size from the original canvas
quadraticCurveT
o()
Creates a quadratic Bézier curve
bezierCurveTo() Creates a cubic Bézier curve
arc() Creates an arc/curve (used to create circles, or parts of circles)
arcTo() Creates an arc/curve between two tangents
isPointInPath() Returns true if the specified point is in the current path, otherwise false

lineTo signature context.lineTo(x,y);
canvas.beginPath();
canvas.moveTo(10, 10);
canvas.lineTo(80, 10);
canvas.stroke();
canvas.beginPath();
canvas.stroke();
canvas.beginPath(); //begins a path, or resets the current path
canvas.lineWidth = 5;
canvas.strokeStyle = "red"
canvas.stroke();

rect signature context.rect(x,y,width,height);
canvas.rect(20,20,100,100);
canvas.fillStyle="#0000FF";
canvas.fill();// Fills the current drawing (path)
canvas.lineWidth = 5;
canvas.strokeStyle = "#00FF00";
canvas.stroke(); //Actually draws the path you have defined

arc signature context.arc(centerX,centerY,radius,startAngle,endAngle,counterclockwise);
Start angle
End angle
Center x,y
var centerX = canvasElement.width / 2;
var centerY = canvasElement.height / 2;
var radius = 50;
var startAngle = 0;
var endAngle = 2 * Math.PI;
canvas.beginPath();
canvas.arc(centerX, centerY, radius, startAngle, endAngle);
canvas.stroke();

 1 HTML Canvas element
 1 moving arc
 1 moving paddle (mousekeyboard)
 25 bricks colorful bricks

HTML 5 Canvas & SVG

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HTML 5 Canvas & SVG