Emitter static and dynamic

Emitter(foobar).js

function Emitter (name) {
  var emitter = this;
  this.$name = name;
  this.staticTriggeredBy = [];
  this.staticTrigger = function () {
    emitter.staticTriggeredBy.push({ $name: this.$name, name: this.name });
    console.log('[static] $name: ' + this.$name + ', name: ' + this.name);
    console.log(JSON.stringify(emitter.staticTriggeredBy));
  };
  
  this.dynamicTriggeredBy = [];
}

  Emitter.prototype.dynamicTrigger = function () {
    // this.dynamicTriggeredBy = this.dynamicTriggeredBy || [];
    this.dynamicTriggeredBy.push({ $name: this.$name, name: this.name });
    console.log('[dynamic] $name: ' + this.$name + ', name: ' + this.name);
    console.log(JSON.stringify(this.dynamicTriggeredBy));
  };

// inherited
  
function pEmitter (name) {
  this.name = name;
}

pEmitter.prototype = new Emitter('foobar');

// tests
  
var e1 = new Emitter('foo'),
    e2 = new Emitter('bar'),
    e3 = new pEmitter('pFoo'),
    e4 = new pEmitter('pBar');

e1.staticTrigger();
e1.dynamicTrigger();

e2.staticTrigger();
e2.dynamicTrigger();

e3.staticTrigger();
e3.dynamicTrigger();

e4.staticTrigger();
e4.dynamicTrigger();

console output

"[static] $name: foo, name: undefined"
"[{"$name":"foo"}]"
"[dynamic] $name: foo, name: undefined"
"[{"$name":"foo"}]"
"[static] $name: bar, name: undefined"
"[{"$name":"bar"}]"
"[dynamic] $name: bar, name: undefined"
"[{"$name":"bar"}]"
"[static] $name: foobar, name: pFoo"
"[{"$name":"foobar","name":"pFoo"}]"
"[dynamic] $name: foobar, name: pFoo"
"[{"$name":"foobar","name":"pFoo"}]"
"[static] $name: foobar, name: pBar"
"[{"$name":"foobar","name":"pFoo"},{"$name":"foobar","name":"pBar"}]"
"[dynamic] $name: foobar, name: pBar"
"[{"$name":"foobar","name":"pFoo"},{"$name":"foobar","name":"pBar"}]"