basic inheritance.js

// a.js
//goog.provide('myapp.A');
myapp.A = function() {}
myapp.A.prototype.move = function() {
    console.log('moveA');
}

// b.js
//goog.provide('myapp.B');
//goog.require('myapp.A');
myapp.B = function() {};
goog.inherits(myapp.B, myapp.A);

myapp.B.prototype.move = function() {
    goog.base(this, 'move');
    console.log('moveB');
}

// Create a B
b = new myapp.B();

// Call move on B outputs:
// 'moveA'
// 'moveB'
b.move();