Safari 11.1: ajax/XHR form submission fails when input[type=file] is empty

Question

UPDATE: As of Webkit build r230963, this issue has been resolved in Webkit.

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Since the recent Safari 11.1 update on macOS and iOS, as

Answer 1

For workaround I delete the input type file completely from DOM using jQuery remove() method.

$("input[type=file]").each(function() {
    if($(this).val() === "") {
        $(this).remove();
    }
});