// isolated layer wrapper (for the local variables)
(function(_W){

var cache = [],                // will store all timeouts IDs
    _set = _W.setTimeout,      // save original reference
    _clear = _W.clearTimeout;  // save original reference

// Wrap original setTimeout with a function
_W.setTimeout = function( CB, duration ){
    // also, wrap the callback, so the cache referece will be removed
    // when the timerout has reached (fired the callback)
    var id = _set(function(){
        CB();
        removeCacheItem(id);
    }, duration || 0);

    cache.push( id ); // store reference in the cache array

    // id must be returned to the user could save it and clear it if they choose to
    return id ;
}

// Wrap original clearTimeout with a function
_W.clearTimeout = function( id ){
    _clear(id);
    removeCacheItem(id);
}

// Add a custom function named "clearTimeouts" to the "window" object
_W.clearTimeouts = function(){
    cache.forEach(n => _clear(n))
    cache.length = [];
}

// removes a specific id from the cache array
function removeCacheItem( id ){
    var idx = cache.indexOf(id);

    if( idx > -1 )
        cache = cache.filter(n => n != id )
}

})(window);