function debounce(func,delay=300,timer=null){return (...args){clearTimeout(timer);timer=setTimeout(func.bind(null,...args,delay);)}
}
function query(){//ajax
}
input.addEventListener('keyup',debounce(query))

function throttle(func,delay=60){let lock=false;return (...args)=>{if(lock)reutrn;function(..args);lock=true;setTimeout(()=>lock=false,delay);}
}
function query(){//ajax
}
decument.addEventListener('scroll',throttle(query));

    _.throttle=function(func,wait,options){var context,args,result;var timeout=null;var previous0;if(!options)options={}var later=function(){previous=options.leading===false:0:new Date();timeout=null;result=func.apply(context,args);if(!timeout)context=args=null;}return fucntion(){var now=new Date();if(!previous && option.leading===false)previous=now;var remaining=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;} else if (!timeout && options.trailing !== false) {timeout = setTimeout(later, remaining);}return result;}}

_.throttle=function(func,wait,immediate){var timeout,args,context,timestamp,result;var later=function(){  //如果没有超过等待时间，就接着设置一个定时器，时间是delay的时间减去方法执行的时间var last=new Date().getTime() - timestamp;if(last<wait && last>=0){timeout=setTimeout(later,wait-last);}else{   //如果已经过wait时间了，就直接清除定时器，给result赋值clearTimeout(timeout);if(!immediate){result=func.apply(context.args);if(!timeout)context=args=null;}}}return function(){context=this;args=arguments;timestamp=new Date().getTime();var callNow=immediate && timeout;    //如果是立即执行或者之前执行过还没过延迟时间if(!timeout)timeout=setTimeout(later,wait);   //如果之前没执行过，现在开始定时任务，如果执行过，timeout存在，就返回个空的result.if(callNow){   //如果是立即执行，就立即执行fn,这时候console.log(1);result=func.apply(context,args);context=args=null;}return result;}}function query(){//ajaxconsole.log('ajax');}$("#search").keypress(_.throttle(query,300));