Free Drawing in <canvas>
In html<canvas id="c" width="500" height="300"></canvas>
In CSS
canvas{ border: 1px solid #ccc; }
In JS
var el = document.getElementById('c');
var ctx = el.getContext('2d');
var isDrawing;
el.onmousedown = function(e) {
isDrawing = true;
ctx.moveTo(e.clientX, e.clientY);
};
el.onmousemove = function(e) {
if (isDrawing) {
ctx.lineTo(e.clientX, e.clientY);
ctx.stroke();
}
};
el.onmouseup = function() {
isDrawing = false;
};
var ctx = el.getContext('2d');
var isDrawing;
el.onmousedown = function(e) {
isDrawing = true;
ctx.moveTo(e.clientX, e.clientY);
};
el.onmousemove = function(e) {
if (isDrawing) {
ctx.lineTo(e.clientX, e.clientY);
ctx.stroke();
}
};
el.onmouseup = function() {
isDrawing = false;
};
BASIC
Editor link
For all drawing techniques
