jQuery does not work in IE11, but works in Chrome

Question

I have problem with jQuery. When I upload image in Chrome it performs the AJAX successfully and I am able to update the page with the response data. But in IE 11 and Firefox it does not. The code:

$(".newfoto").on('submit', (function(e) {
    $("#mailresult").html('<img src="themes/standart/iconss/spin1.gif" alt="loading..." /><p>Please, wait...</p>');
    e.preventDefault();
    $.ajax({
        url: "dataok.php?act=foto",
        type: "POST",
        data: new FormData(this),
        contentType: false,
        cache: false,
        processData: false,
        success: function(data) {
            $("#mailresult").html(data);
            setTimeout(function() {
                $("#mailresult").empty();
            }, 2000);
            var imgTag = '<img src="image.php?imgid=' + escape($('.myphoto').attr('id')) + '" />';
            $('.myphoto').html(imgTag);
        },

        error: function() {}

    });
}));

Answer 1

The correct way to prevent the form from submitting and reloading the page is to use a return false; at the end of the submit function. This will also replace e.preventDefault(); in your code.

Also, FormData is not supported on all browsers. See https://stackoverflow.com/a/2320097/584192 . You may need to detect and workaround this.

$(".newfoto").on('submit', function(e) {
    $("#mailresult").html('<img src="themes/standart/iconss/spin1.gif" alt="loading..." /><p>Please, wait...</p>');
    $.ajax({
        url: "dataok.php?act=foto",
        type: "POST",
        data: (typeof FormData === 'function') ? new FormData(this) : $(this).serialize(),
        contentType: false,
        cache: false,
        processData: false,
        success: function(data) {
            // success
        },
        error: function(jqXHR, status, error) {
            console.log(error);
        }
    });
    return false;
});