How to generate a thumbnail image after adding an image inside an input type=“file” in a form and submitting them both on the same form

Question

I have a form which allows the user to upload a picture. After the user has submitted the form, I\'d like to generate on the front-end a thumbnail for each picture and then

Answer 1

After a better search online I found the answer to my question.

It is possible to combine canvas together with the File API.

Try to upload any picture in the demo below and see that a new generated thumbnail will appear on the right side of the form.

DEMO: http://jsfiddle.net/a_incarnati/fua75hpv/

function handleImage(e){
    var reader = new FileReader();
    reader.onload = function(event){
        var img = new Image();
        img.onload = function(){
            canvas.width = img.width;
            canvas.height = img.height;
            ctx.drawImage(img,0,0);
        }
        img.src = event.target.result;
    }
    reader.readAsDataURL(e.target.files[0]);     
}

A good answer has been given by DerekR to this question:

How to upload image into HTML5 canvas