Downloading Canvas element to an image

What are the different ways to save a canvas object?

In my research, I've found two approaches:

var data = canvas.toDataURL();
var prev = window.location.href;
window.location.href = data.replace("image/png", "image/octet-stream");
window.location.href = prev;

Another way is to take a snapshot.

Are there other ways to do this?

Is it possible to customize the download filename?

Solution that requires NO BUTTON:

var download = function(){
  var link = document.createElement('a');
  link.download = 'filename.png';
  link.href = document.getElementById('canvas').toDataURL()
  link.click();
}

Useful if you have other triggers for downloading, or triggers that you can't easily reference.

The one way to save is exporting as an image... You already found this solution, and it's the best one i think ;)

    var canvas = document.getElementById("mycanvas");
    var img    = canvas.toDataURL("image/png");
    document.write('<img src="'+img+'"/>');

You can use different image types. Change the mimetype in this function:

    canvas.toDataURL("image/jpeg");

An other way to save canvas data (into a PDF) is using the wkhtmltopdf Library

Cheers. Frank

frankneff.ch / @frankneff