函数节流throttle和防抖debounce

let throttle  = function(fn,intervalTime){
    let lastTime = 0;
    return function(){
        let ctx = this;
        let now = new Date().getTime();
        if(now-lastTime>= intervalTime){
            lastTime = now;
            fn.apply(this,arguments)
        }
    }
}

let debounce = function(fn,intervalTime){
    let timer = null;
大专栏  函数节流throttle和防抖debounceine">    return function(){
        if(timer)clearTimeout(timer)
        timer = setTimeout(()=>fn.apply(this,arguments),intervalTime)
    }
}

let throttle  = function(fn,intervalTime){
    let last = 0;
    let timer = null;
    return function(){
        let now = new Date.getTime();
        if((now-last) < intervalTime}{
            if(timer)clearTimeout(timer);
            setTimeout(fn.apply(this,arguments),intervalTime);
        }else{
            fn.apply(this,arguments);   
        }
    }
}