basic js pattern (with requirejs)

app.js

require(["thing"], function(Thing) {
  
  var thing = new Thing({
    place: "Chicago"
  });

  thing.runAround();
  
});

thing.js

define(["jquery"], function($) {
  
  var Thing = function(args) {
    this.config = this.args;
    this.init();
  };
  
  // Method 1 (more standard)
  Thing.prototype.init = function() {
    console.log("app has initialized!");
    console.log(this.config);
  };
  
  Thing.prototype.runAround = function() {
    console.log("I'm running!");
    console.log("I'm running to " + this.config.place);
  };
  
  // Method 2 (I kind of like this way better)
  var methods = {
    init: function() {
      console.log("app has initialized!");
    },
    runAround: function() {
      console.log("I'm running!");
    }
  };
  // Method 2 just adds all those functions into the prototype. Seems cleaner to me.
  $.extend(Thing.prototype, methods);
  
});

Method 1 adds stuff directly to the prototype. But I like method 2 to keep it cleaner. I like working in an object literal w/my functions. Just a preference though.