var PollingManager = (function (){
 
    function PollingManager ( ms ) {
        this._startTime = 0;
        this._polling = ms;
    }
 
    PollingManager.prototype.update = function (){
        var now = new Date().getTime(),
            bool = false;
 
        if ( ( now - this._startTime ) >= this._polling ) {
 
            this._startTime = now;
            bool = true;
        }
 
        return bool;
    };
 
    return PollingManager;
}());

var PollingManager = (function (){ function PollingManager ( ms ) { this._startTime = 0; this._polling = ms; } PollingManager.prototype.update = function (){ var now = new Date().getTime(), bool = false; if ( ( now - this._startTime ) >= this._polling ) { this._startTime = now; bool = true; } return bool; }; return PollingManager; }());

var Main = ( function (){
    var _id, _fps;
 
    function _loop () {
        _id = requestAnimationFrame( _loop );
 
        if ( _fps.update() ) {
            // 以下にfpsに依存しループ実行したいコード
 
        };
    }
 
    function Main () {
        this._fps = 24;
    }
 
    var p = Main.prototype;
 
    p.setFPS = function ( fps ){
        _fps = new PollingManager( 1000 / fps );
    };
 
    p.start = function (){
        if ( typeof _fps === "undefined" ) {
 
             _fps = new PollingManager( 1000 / this._fps );
        }
 
        _loop();
    };
 
    p.stop = function (){
        cancelAnimationFrame( _id );
    };
 
    return Main;
}());
 
var main = new Main();

var Main = ( function (){ var _id, _fps; function _loop () { _id = requestAnimationFrame( _loop ); if ( _fps.update() ) { // 以下にfpsに依存しループ実行したいコード }; } function Main () { this._fps = 24; } var p = Main.prototype; p.setFPS = function ( fps ){ _fps = new PollingManager( 1000 / fps ); }; p.start = function (){ if ( typeof _fps === "undefined" ) { _fps = new PollingManager( 1000 / this._fps ); } _loop(); }; p.stop = function (){ cancelAnimationFrame( _id ); }; return Main; }()); var main = new Main();

// fpsを8へ
main.setFPS( 8 );

// fpsを8へ main.setFPS( 8 );