Demonstrating Adapter pattern (aka wrapper pattern) in JavaScript.

gistfile1.js

function OldLogger (type) {
    this.writeToLog = function(message) {
        //To stuff.
    };
}

function NewLogger (type) {
    this.doLog = function(message) {
        //To stuff.
    };
}

// code using the old logger
OldLogger.writeToLog("Log event A");

// code using the new logger
NewLogger.doLog("Log event B");

function MyLogger (type) {
    this.log = function(message) {
      // use the new logging library.
        NewLogger.doLog(message);
    };
}

// code using our own logger wrapper.
MyLogger.log("Log event C");