How to connect to SQL Server database from JavaScript

How to connect to SQL Server database from JavaScript
Using javascript to access databases may harmful for several reasons like bad practice, security issues, etc..  here is an example given below:
var connection = new ActiveXObject("ADODB.Connection") ;
var
connectionstring="Data Source=<server>;Initial Catalog=<catalog>;User ID=<user>;Password=<password>;Provider=SQLOLEDB";
connection.Open(connectionstring);
var rs = new ActiveXObject("ADODB.Recordset");
rs.Open("SELECT * FROM table", connection);
rs.MoveFirst
while(!rs.eof)
{  
document.write(rs.fields(1));
   rs.movenext;
}
rs.close;
connection.close;
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