importnowfrom'./now.js';

exportdefaultfunctionthrottle(func, wait, options) {vartimeout, context, args, result;varprevious =0;if(!options) options = {};varlater =function() {
    previous = options.leading===false?0:now();
    timeout =null;
    result = func.apply(context, args);if(!timeout) context = args =null;
  };varthrottled =function() {var_now =now();if(!previous && options.leading===false) previous = _now;varremaining = wait - (_now - previous);
    context =this;
    args =arguments;if(remaining <=0|| remaining > wait) {if(timeout) {clearTimeout(timeout);
        timeout =null;
      }
      previous = _now;
      result = func.apply(context, args);if(!timeout) context = args =null;
    }elseif(!timeout && options.trailing!==false) {
      timeout =setTimeout(later, remaining);
    }returnresult;
  };

  throttled.cancel=function() {clearTimeout(timeout);
    previous =0;
    timeout = context = args =null;
  };returnthrottled;
}