Creating a Document Library in SharePoint hosted APP using SharePoint 2013 REST API

I used the below code to create a document library using SharePoint 2013 Hosted App

Before you do this just copy the below code and paste it into APP.js file

<script type="text/javascript">

             'use strict'; 

             var hostweburl;  

             var appweburl;  

  

             // This code runs when the DOM is ready and creates a context object which is  

             // needed to use the SharePoint object model 

             $(document).ready(function () {           

                 //Get the URI decoded URLs.  

                 hostweburl =  

                     decodeURIComponent(  

                         getQueryStringParameter("SPHostUrl"));  

                 appweburl =  

                     decodeURIComponent(  

                         getQueryStringParameter("SPAppWebUrl"));  

                 // Resources are in URLs in the form: 

                 // web_url/_layouts/15/resource 

                 var scriptbase = hostweburl + "/_layouts/15/";   

  

                 // Load the js file and continue to load the page with information about the list top level folders. 

                 // SP.RequestExecutor.js to make cross-domain requests 

         

                 // Load the js files and continue to the successHandler 

                 $.getScript(scriptbase + "SP.RequestExecutor.js", execCrossDomainRequest); 

             });               

             // Function to prepare and issue the request to get 

             //  SharePoint data 

             function execCrossDomainRequest() { 

                 // executor: The RequestExecutor object 

                 // Initialize the RequestExecutor with the app web URL. 

                 var executor = new SP.RequestExecutor(appweburl);            

                 var listName="New Document Library"; 

 

                 // Issue the call against the app web. 

                 // To get the title using REST we can hit the endpoint: 

 

                 //      appweburl/_api/web/lists/getbytitle('listname')/items 

                 // The response formats the data in the JSON format. 

 

                 // The functions successHandler and errorHandler attend the 

                 //      sucess and error events respectively. 

                 executor.executeAsync( 

                     { 

                         url: appweburl + "/_api/SP.AppContextSite(@target)/web/Lists?@target='" + hostweburl + "'", 

                         method: "POST", 

                         body: "{ '__metadata': { 'type': 'SP.List' }, 'BaseTemplate': 101,'Description': '" + listName + "', 'Title':'" + listName + "'}", 

                         headers: {"content-type": "application/json; odata=verbose"}, 

                         success: contextSuccessHandler, 

                         error: contextErrorHandler 

                     } 

                 ); 

             

             }                       

             // This function prepares, loads, and then executes a SharePoint query to get  

             // the current users information       

             //Utilities     

             // Retrieve a query string value.  

             // For production purposes you may want to use  

             // a library to handle the query string.  

             function getQueryStringParameter(paramToRetrieve) {  

                 var params =  

                     document.URL.split("?")[1].split("&");    

                 for (var i = 0; i < params.length; i = i + 1) {  

                     var singleParam = params[i].split("=");  

                     if (singleParam[0] == paramToRetrieve)  

                         return singleParam[1];  

                 }  

             }     

             //Retrieve the form digest value.      

             //Store the value of the form digest.  

             function contextSuccessHandler(data) {  

                 alert("New List Has Been Created Successfully"); 

      </script>