problems encountered send ajax request

1、Illegal invocation　

Processing method: the portion marked in red -　

	the FormData new new formData = var (); 
        formData.append ( 'imgs', "Upload / Fruit / 284333BDBEFB481BB27C8E84FB7C0D82.jpg"); 
        formData.append ( 'reason', $ ( 'TextArea') text ().); 
        $ .ajax ({ 
        type: "POST", 
        URL: "/api/order_cancle.rm", 
        Data: formData, 
        headers: { 'token': sessionStorage.getItem ( "token")}, 
        dataType: 'JSON', the processData: to false, // not tell jquery to handle data sent 
        contentType: false, // do not tell jquery request to set the Content-Type header 
        Success: function (data) {IF (data.code == 100) { 
        the console.log ( "filed success! "); 
        } the else { 
        console.log (" filed failure ")!;
        }} 
        }); Reference:
        
https://www.jianshu.com/p/436159828bfa