MSSQL: Rebuild Index ONLINE

Comparing Rebuild Online on databases that I am familiar with. 

SQL Server
alter index xxxx rebuild ON VPX_VM REBUILD WITH (ONLINE = ON);
alter index xxxx rebuild ON VPX_VM REORGANIZE;

Oracle
alter index xxxx on VPX_VM online;
alter index xxxx rebuild ON VPX_VM REORGANIZE;

Postgresql
alter index xxx on VPX_VM online;
(No Reorganize feature for Postgresql until Postgresql 10)
Alternatively, performing Rebuild Index concurrently.

The awkward way of SQL Server to rebuild index online.