Restrict Browser Back button

history.pushState(null, null, location.href);
    window.onpopstate = function () {
        history.go(1);
    };

Use the above code to restrict going to the back page from the current page.

This piece of code comes very handy when you are working on dynamics portals and you have logic where you should not allow users to navigate to back page.

CRM 2016 Web API Retrieve Attribute Names By Entity Name

GetEntityMetaData function will retrieve the list of attributes from he Account entity.

 function GetEntityMetaData() {  
   var entityType = "Account";  
   var metaDataId = getMetaDataIdByName(entityType);  
   var schemaNames = getAttributeList(metaDataId);  
 }  
 function getAttributeList(metaDataId) {  
   var attributesList;  
   $.ajax({  
     type: "GET",  
     contentType: "application/json; charset=utf-8",  
     datatype: "json",  
     url: Xrm.Page.context.getClientUrl() + "/api/data/v8.1/EntityDefinitions(" + metaDataId + ")?$select=LogicalName&$expand=Attributes($select=LogicalName)",  
     beforeSend: function (XMLHttpRequest) {  
       XMLHttpRequest.setRequestHeader("OData-MaxVersion", "4.0");  
       XMLHttpRequest.setRequestHeader("OData-Version", "4.0");  
       XMLHttpRequest.setRequestHeader("Accept", "application/json");  
       XMLHttpRequest.setRequestHeader("Prefer", "odata.include-annotations=\"OData.Community.Display.V1.FormattedValue\"");  
     },  
     async: false,  
     success: function (data, textStatus, xhr) {  
       attributesList = data.Attributes;  
     },  
     error: function (xhr, textStatus, errorThrown) {  
       alert(textStatus + " " + errorThrown);  
     }  
   });  
   return attributesList;  
 }  
 function getMetaDataIdByName(entityType) {  
   var MetadataId;  
   $.ajax({  
     type: "GET",  
     contentType: "application/json; charset=utf-8",  
     datatype: "json",  
     url: Xrm.Page.context.getClientUrl() + "/api/data/v8.1/EntityDefinitions?$select=DisplayName,IsKnowledgeManagementEnabled,EntitySetName&$filter=SchemaName eq '" + entityType + "'",  
     beforeSend: function (XMLHttpRequest) {  
       XMLHttpRequest.setRequestHeader("OData-MaxVersion", "4.0");  
       XMLHttpRequest.setRequestHeader("OData-Version", "4.0");  
       XMLHttpRequest.setRequestHeader("Accept", "application/json");  
       XMLHttpRequest.setRequestHeader("Prefer", "odata.include-annotations=\"OData.Community.Display.V1.FormattedValue\"");  
     },  
     async: false,  
     success: function (data, textStatus, xhr) {  
       var result = data.value[0];  
       MetadataId = result.MetadataId;  
     },  
     error: function (xhr, textStatus, errorThrown) {  
       alert(textStatus + " " + errorThrown);  
     }  
   });  
   return MetadataId;  
 }