/**
 * 函數防抖 (只執(zhí)行最后一次點擊)
 * @param fn
 * @param delay
 * @returns {Function}
 * @constructor
 */
export const Debounce = (fn, t) => {
    let delay = t || 500;
    let timer;
    console.log(fn)
    console.log(typeof fn)
    return function () {
        let args = arguments;
        if(timer){
            clearTimeout(timer);
        }
        timer = setTimeout(() => {
            timer = null;
            fn.apply(this, args);
        }, delay);
    }
};
 
 
/**
 * 函數節(jié)流
 * @param fn
 * @param interval
 * @returns {Function}
 * @constructor
 */
export const Throttle = (fn, t) => {
    let last;
    let timer;
    let interval = t || 500;
    return function () {
        let args = arguments;
        let now = +new Date();
        if (last && now - last < interval) {
            clearTimeout(timer);
            timer = setTimeout(() => {
                last = now;
                fn.apply(this, args);
            }, interval);
        } else {
            last = now;
            fn.apply(this, args);
        }
    }
};

用法：

methods:{
    getAliyunData:Throttle(function(){
    ...
     },1000),
}

案例2：
防抖和節(jié)流是我們在開發(fā)過程中常用優(yōu)化性能的方式

在 vue 中怎么使用：

1、在公共方法中（如 public.js 中），加入函數防抖和節(jié)流方法

// 防抖
export function _debounce(fn, delay) {
 
    var delay = delay || 200;
    var timer;
    return function () {
        var th = this;
        var args = arguments;
        if (timer) {
            clearTimeout(timer);
        }
        timer = setTimeout(function () {
            timer = null;
            fn.apply(th, args);
        }, delay);
    };
}
// 節(jié)流
export function _throttle(fn, interval) {
    var last;
    var timer;
    var interval = interval || 200;
    return function () {
        var th = this;
        var args = arguments;
        var now = +new Date();
        if (last && now - last < interval) {
            clearTimeout(timer);
            timer = setTimeout(function () {
                last = now;
                fn.apply(th, args);
            }, interval);
        } else {
            last = now;
            fn.apply(th, args);
        }
    }
}

2、在需要使用的組件引用

import { _debounce } from "@/utils/public";

3、在 methods 中使用

  methods: {
    // 改變場數
    changefield: _debounce(function(_type, index, item) {
        // do something ...
    }, 200)
  }