SharePoint Bookmarklet: Get Fields - Takes List Name as input and outputs all fields with internal names on console

javascript:(function(w){if("undefined"===typeof jQuery){var jq=document.createElement("script");jq.type="text/javascript";jq.src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js";document.getElementsByTagName("head")[0].appendChild(jq)}var requestHeaders={Accept:"application/json;odata=verbose","X-RequestDigest":jQuery("#__REQUESTDIGEST").val()};var iList=w.prompt("Please enter the list name","Tasks");var a=jQuery.ajax({url:_spPageContextInfo.webAbsoluteUrl+"/_api/lists/getbytitle('"+iList+"')?$select=Fields&$expand=Fields",type:"POST",contentType:"application/json;odata=verbose",headers:requestHeaders,success:function(data){console.log(data);var fields=data.d.Fields.results,f={};for(i=0;i<fields.length;i++){console.log("Title: "+fields[i].Title+" | "+"Internal Name: "+fields[i].InternalName+" | "+"Type: "+fields[i].TypeAsString+" | "+"GUID: "+fields[i].Id+" ");var _f={Title:fields[i].Title,InternalName:fields[i].InternalName,Type:fields[i].Type,GUID:fields[i].GUID,meta:fields[i]};console.log(_f);f[fields[i].Title]=_f}console.log(f);alert("Success! See the console.")},error:function(jqxr,errorCode,errorThrown){console.log(jqxr.responseText);alert("Error! See the console.")}})})(window);