JSFiddle - React, Tailwind, and code Playground

JavaScript

var MyDate_String_Value = "/Date(1224043200000)/"
var value = new Date
            (
                 parseInt(MyDate_String_Value.replace(/(^.*\()|([+-].*$)/g, ''))
            );
var dat = value.getMonth() + 
                         1 + 
                       "/" + 
           value.getDate() + 
                       "/" + 
       value.getFullYear();
alert(dat);