JS Patterns

.JS Patterns Collection.readme.md

JS Patterns Collection

retry-manager.js

var Manager = function( action ){

    this._lock = false;    
    this._retry = 1;
    this._action = action;
    this._self = this
}

Manager.prototype.try = function (){
    
    this._retry++
    console.log(this._retry)
    
    !this._lock && setTimeout( () => { 
                                    this._lock = this._retry;
                                    this._action() 
                                    this._lock = false; 
                                }, 
                                1000 * this._retry );
}

Manager.prototype.onSunccess = function(){
    this._lock = false; 
    this.retry = 0;
}

Manager.prototype.onFail = function(){
    this._lock = false; 
    this.try();
}


var mgr = new Manager( () => { alert('xxx'); } );
mgr.try()
mgr.onFail()
mgr.onFail()
mgr.onSunccess()
mgr.try()

singletone.js

var Config = (function(){

  var instance;

  function create(){
    
    return {
        name: "Name",
        print: function(){ return JSON.stringify(this); }
      }
  }

  return {

    getInstance: function(){

      if (!instance)
        instance = create();
      
      return instance;
    }
  };
})();


/// USAGE ///

var ins1 = Config.getInstance();
ins1.newProperty = "Prop was added after init but all instances have it."

var ins2 = Config.getInstance();
ins2.name = "Peter"

/// OUTPUT ///
function write(data) { document.write( data+"<br>" ); }
write( JSON.stringify( ins1 ) ); // the same
write( JSON.stringify( ins2 ) ); // the same
write( ins1.print()           );
write( ins1.instance          ); // undefined (private prop)
write( Config.instance        ); // undefined (private prop)