Ejemplo 1: tomar una captura de pantalla javascript del lienzo
canvas.toDataURL('png')Ejemplo 2: tomar una captura de pantalla de una imagen dentro de un div usando js
<!doctype html>
<html>
<head>
<script type="text/javascript" src="html2canvas-master/dist/html2canvas.js"></script>
</head>
<body>
<h1>Take screenshot of webpage with html2canvas</h1>
<div class="container" id='container' >
<img src='images/image1.jpg' width='100' height='100'>
<img src='images/image2.jpg' width='100' height='100'>
<img src='images/image3.jpg' width='100' height='100'>
</div>
<input type='button' id='but_screenshot' value='Take screenshot' onclick='screenshot();'><br/>
<!-- Script -->
<script type='text/javascript'>
function screenshot(){
html2canvas(document.body).then(function(canvas) {
document.body.appendChild(canvas);
});
}
</script>
</body>
</html>Ejemplo 3: tomar una captura de pantalla javascript del lienzo
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
}
</style>
</head>
<body>
<canvas id="myCanvas" width="578" height="200"></canvas>
<script>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
// draw cloud
context.beginPath();
context.moveTo(170, 80);
context.bezierCurveTo(130, 100, 130, 150, 230, 150);
context.bezierCurveTo(250, 180, 320, 180, 340, 150);
context.bezierCurveTo(420, 150, 420, 120, 390, 100);
context.bezierCurveTo(430, 40, 370, 30, 340, 50);
context.bezierCurveTo(320, 5, 250, 20, 250, 50);
context.bezierCurveTo(200, 5, 150, 20, 170, 80);
context.closePath();
context.lineWidth = 5;
context.fillStyle = '#8ED6FF';
context.fill();
context.strokeStyle = '#0000ff';
context.stroke();
// save canvas image as data url (png format by default)
var dataURL = canvas.toDataURL();
</script>
</body>
</html>Ejemplo 4: tomar una captura de pantalla javascript del lienzo
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