To connect to Informix, you can use either a DSN or an ODBC connection string. Both of these methods use the Database's Open method.

Connect to a DSN

To connect using a DSN:

var db = new Database();
db.open("DSN=CData Informix Sys", (err) => {
    // Use the connection
});

Provide a Driver Connection String

To connect using an ODBC connection string:

var db = new Database();
db.open("DRIVER={CData ODBC Driver for Informix};Server=10.0.1.2;Port=50000;User=admin;Password=admin;Database=test;", (err) => {
    // Use the connection
});