exploring different plugin initialization options

gistfile1.js

// version 1
function A() {
  this.init();
}

A.prototype = {
  init: function () {
    A.inits.forEach(function (item) {
      item.call(this);
    }, this);
  }       
}
    
A.inits = [];

// plugin 1
A.inits.push(function () {
  console.log("plugin 1");
});

// plugin 2
A.inits.push(function () {
  console.log("plugin 2");
});

var a = new A();


// version 2
function A() {
  A.ready.call(this);
}
    
A.ready = function (fn) {
  if (fn) {
   A.inits = A.inits || [];
   A.inits.push(fn); 
  }
  else {
    A.inits && A.inits.forEach(function (item) {
      item.call(this);
    }, this);
  }
}

// plugin 1
A.ready(function () {
  console.log("init plugin 1");
});

// plugin 2
B.ready(function () {
  console.log("init plugin 2");
});

// more generic ready
var ready = function (fn) {
  if (fn) {
    this.inits = this.inits || [];
    this.inits.push(fn);
  }
  else {
    var ctr = this.constructor;
    ctr.inits && ctr.inits.forEach(function (fnc) {
      fnc.call(this);
    }, this);
  }
}

function A() {
  ready.call(this);
}

function B() {
  ready.call(this);
}

​// plugin
ready.call(A, function () {
  // init plugin stuff
});

ready.call(B, function () {
  // init plugin stuff
});