Trying to fix the orientation of image on client side with jQuery. [EXIF is not defined]

Question

I am trying to detect the EXIF data (Orientation) of an image and show it without being rotated when selected. For the image preview the FileReader API is being used. I was able to fix server side orientation but for frontend I have having trouble.

I am using this library to get the EXIF data of an image.

I have imported the exif.js to my project.

<script src="frontend/js/exif.js">

HTML

<input id="choose-img" accept="image/*" name="image" type="file" onchange="readURLimg(this);">
<img class="img-uploaded" id="img-file">

jQuery

function readURLimg(input) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();
        reader.onload = function(e) {
         /* Check Exif and fix orientation of image */
            EXIF.getData([0], function() {
                console.log('Exif=', EXIF.getTag(this, "Orientation"));
                switch(parseInt(EXIF.getTag(this, "Orientation"))) {
                    case 2:
                        $img.addClass('flip'); break;
                    case 3:
                        $img.addClass('rotate-180'); break;
                    case 4:
                        $img.addClass('flip-and-rotate-180'); break;
                    case 5:
                        $img.addClass('flip-and-rotate-270'); break;
                    case 6:
                        $img.addClass('rotate-90'); break;
                    case 7:
                        $img.addClass('flip-and-rotate-90'); break;
                    case 8:
                        $img.addClass('rotate-270'); break;
                }
            });

            $('#img-file').attr('src', e.target.result).width('50%').height('auto');

        reader.readAsDataURL(input.files[0]);
    }
}

In my console I am getting this error:

Uncaught ReferenceError: EXIF is not defined at FileReader.reader.onload

Any Suggestions?

Answer 1

Does this work?

function readURLimg(input) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();
        reader.onload = function(e) {
            var img = $('#img-file')
            img.attr('src', e.target.result).width('50%').height('auto');
            fixExifOrientation(img)
        }
        reader.readAsDataURL(input.files[0]);
    }
}
function fixExifOrientation($img) {
    $img.on('load', function() {
        EXIF.getData($img[0], function() {
            console.log('Exif=', EXIF.getTag(this, "Orientation"));
            switch(parseInt(EXIF.getTag(this, "Orientation"))) {
                case 2:
                    $img.addClass('flip'); break;
                case 3:
                    $img.addClass('rotate-180'); break;
                case 4:
                    $img.addClass('flip-and-rotate-180'); break;
                case 5:
                    $img.addClass('flip-and-rotate-270'); break;
                case 6:
                    $img.addClass('rotate-90'); break;
                case 7:
                    $img.addClass('flip-and-rotate-90'); break;
                case 8:
                    $img.addClass('rotate-270'); break;
            }
        });
    });
}