My Code is like this
<html>
<head>
</head>
<body>
<canvas id="myCanvas" width="578" height="200" style="display:none;"></canvas>
<img id="canvasImg" onclick="myFunction()" alt="Right click to save me!">
<script>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
function myFunction() {
var c = document.getElementsByTagName("canvas");
// save canvas image as data url (png format by default)
var dataURL = c.toDataURL();
// set canvasImg image src to dataURL
// so it can be saved as an image
document.getElementById('canvasImg').src = dataURL;
}
</script>
</body>
</html>
When i click on canvasImg its throwing an error
Uncaught TypeError: Object #<NodeList> has no method 'toDataURL'
I have made a fiddle here Can any one point out whats going wrong?
My Code is like this
<html>
<head>
</head>
<body>
<canvas id="myCanvas" width="578" height="200" style="display:none;"></canvas>
<img id="canvasImg" onclick="myFunction()" alt="Right click to save me!">
<script>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
function myFunction() {
var c = document.getElementsByTagName("canvas");
// save canvas image as data url (png format by default)
var dataURL = c.toDataURL();
// set canvasImg image src to dataURL
// so it can be saved as an image
document.getElementById('canvasImg').src = dataURL;
}
</script>
</body>
</html>
When i click on canvasImg its throwing an error
Uncaught TypeError: Object #<NodeList> has no method 'toDataURL'
I have made a fiddle here Can any one point out whats going wrong?
Share Improve this question asked Nov 1, 2013 at 7:29 NoneNone 5,68023 gold badges93 silver badges178 bronze badges2 Answers
Reset to default 5DEMO
document.getElementsByTagName returns array of elements objects, and no array objects have method toDataUrl
instead of this
var c = document.getElementsByTagName("canvas");
use
var c = document.getElementsByTagName("canvas")[0];
function myFunction() {
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
var img = document.getElementById("canvasImg");
context.drawImage(img, 0, 0);
}