html2canvas update image

$('#capture').on('click', function () {
    if (confirm("Esta seguro de guardar este Cartel?")){
        $(this).prop("disabled", true);
        let message = $(this).html();
        $(this).html('<i class="fa fa-spinner fa-spin" aria-hidden="true"></i> Generando...');
        html2canvas(document.querySelector('#content-capture')).then(function (canvas) {
            let url = "/curate/21/capture";
            let name = "228d1aa8f67997062dfa831f4c6f8a59553cd700aced02f5244e6ff4b176b62b";

            postCanvas(url, name, canvas, $('#capture'), message);
        });
    }
});

function postCanvas(url, name, canvas, object, message) {

    var dataURL = canvas.toDataURL('image/png', 0.9);
    var imgData = dataURL.replace(/^data:image\/(png|jpg);base64,/, "");

    $.ajaxSetup({
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        }
    });

    $.ajax({
        url: url,
        type: 'POST',
        data: {
            customFile: imgData
        },
        dataType: 'json',
    }).done(function (data) {
        object.prop("disabled", false);
        object.html(message);
        checkMedia();
        alert(data.message);
    }).fail(function () {
        alert('Error');
    });

}