函数防抖debounce、节流函数throttle

// 防抖
function debounce(fn, delay, ctx) {
    let sto = null;
    return function(){
        let args = arguments;
        sto && clearTimeout(sto);
        sto = setTimeout(() => {
            fn.apply(ctx, args);
        }, delay);
    }
}

// 节流
function throttle(fn, delay, ctx) {
    let flag = true;
    return function(){
        let args = arguments;
        if(flag) {
            fn.apply(ctx, args);
            flag = false;
            setTimeout(function() {
                flag = true;
            }, delay)
        }
    }
}

window.onresize = throttle(function() {
    console.log('test')
}, 1000, this)