Why Is Connecting to SQL Server Directly from Browser-Side JavaScript Not Recommended?

Connecting to SQL Server from JavaScript in the Browser: Not Recommended

While JavaScript can be utilized for web programming, it is strongly advised against using client-side JavaScript to access databases. This approach has numerous drawbacks, including security concerns and poor programming practices.

Despite the recommendation against client-side JavaScript database access, below is a sample code that demonstrates how it can be achieved with ActiveX objects:

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;

However, for secure and efficient database connectivity, it is far more recommended to employ server-side languages such as PHP, Java, or .NET. Client-side JavaScript should primarily focus on user interface management.

It is worth noting that rumors persist regarding the existence of server-side JavaScript, but this remains an elusive concept.

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