利用函数防抖和函数节流提高小程序性能

const _.debounce = (func, wait) => {

let timer;

return

() => {

clearTimeout(timer);

timer = setTimeout(func, wait);

};

};

const throttle = (func, wait) => {

let last = 0;

return

() => {

const current_time = +

new

Date();

if

(current_time - last > wait) {

func.apply(

this

, arguments);

last = +

new

Date();

}

};

};