W jaki sposob zbadac czy dana przegladarka obsluguje element canvas?
Ponizszy przyklad zwraca blad pod IE.
Kod
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<canvas id="c"></canvas>
<script type="text/javascript">//<![CDATA[
if(document.getElementById('c').getContext('2d')){alert('jest')}else{alert('nie ma')}
//]]></script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<canvas id="c"></canvas>
<script type="text/javascript">//<![CDATA[
if(document.getElementById('c').getContext('2d')){alert('jest')}else{alert('nie ma')}
//]]></script>
</body>
</html>