如何从此javascript函数返回值

Question

I'm working with html2canvas and I have the next function

hml2canvas($('body'), {
   onrendered: function(canvas) {           
         data = canvas.toDataURL('image/jpeg');
    }
});

Now, I want to return the data value, so I tried this

html2canvas($('body'), {
    onrendered: (this, imgBase64)         
});

var data;
function imgBase64(canvas) {
     data = canvas.toDataURL('image/jpeg');
}
console.log(data);

but when I see the console I get "undefined". If I put console.log(data); inside the imgBase64 function I get the base64 of the image, but I need the data out of that function to make another work with it. Any ideas? Thanks.

Answer 1

I found this answer so I modified to adapt to my needs.

var html2obj = html2canvas($('body'));
var queue  = html2obj.parse();
var canvas = html2obj.render(queue);
var data = canvas.toDataURL('image/jpeg');

this way I have the data to use later.