TypeError: ' Append ' called on a object that does not implement interface FormData workaround

When submitting form forms using AJAX, $ ("FormId"). Serialize () cannot submit type= "file" type input, this time you can choose to use Formdata, using the method as follows

var dataForm = new FormData (document.getElementById ("Queryform"));                $.ajax ({                    processdata:false,//this must have, otherwise will be error                    contenttype:false,//This must have, otherwise will error                    type: "POST",                    URL: "/ Trail/shopdeepupload ",                    data:dataform,                    async:false,                    dataType:" JSON ",                    success:function (data) {                        if (data== "false") {                            Showtippanel ("Upload failed, please try again!") ");                        }                        if (data== "true") {                            Showtippanel ("Upload succeeded! ");                            SetInterval (Retfun (), +);}}                );

　

TypeError: ' Append ' called on a object that does not implement interface FormData workaround