1.阻止冒泡

  1. export const stopPropagation = (e) => { 
  2.     e = e || window.event; 
  3.     if(e.stopPropagation) {    // W3C阻止冒泡方法 
  4.         e.stopPropagation(); 
  5.     } else { 
  6.         e.cancelBubble = true; // IE阻止冒泡方法 
  7.     } 
  8. }

2.防抖函数

  1. export const debounce = (fn, wait) => {
  2.   let timer = null;
  4.   return function() {
  5.     let context = this,
  6.         args = arguments;
  8.     if (timer) {
  9.       clearTimeout(timer);
  10.       timer = null;
  11.     }
  13.     timer = setTimeout(() => {
  14.       fn.apply(context, args);
  15.     }, wait);
  16.   };
  17. }

3.节流函数

  1. export const throttle = (fn, delay) => {
  2.   let curTime = Date.now();
  4.   return function() {
  5.     let context = this,
  6.         args = arguments,
  7.         nowTime = Date.now();
  9.     if (nowTime - curTime >= delay) {
  10.       curTime = Date.now();
  11.       return fn.apply(context, args);
  12.     }
  13.   };
  14. }

4.数据类型判断

  1. export const getType = (value) => {
  2.   if (value === null) {
  3.     return value + "";
  4.   }
  5.   // 判断数据是引用类型的情况
  6.   if (typeof value === "object") {
  7.     let valueClass = Object.prototype.toString.call(value),
  8.       type = valueClass.split(" ")[1].split("");
  9.     type.pop();
  10.     return type.join("").toLowerCase();
  11.   } else {
  12.     // 判断数据是基本数据类型的情况和函数的情况
  13.     return typeof value;
  14.   }
  15. }