A simple example of tab development (code)

This article brings you a simple example (code) of tab development. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
The following methods are used
changeTabHandle function used in methods 1-3

//当前点击按钮的索引
function changeTabHandle(n) {
    for(var i=0; i<tabList.length; i++){
        tabList[i].className = &#39;&#39;;
        pList[i].className = &#39;&#39;;
    }
    tabList[n].className = &#39;active&#39;;
    pList[n].className = &#39;active&#39;; 
}

Custom attribute name

   //方法一：自定义属性方法
   console.log(tabList);
   for (var i = 0;i < tabList.length; i++){
   tabList[i]._f_index = i;
   tabList[i].onclick = function () {
       console.dir(this);
       changeTabHandle(this._f_index);
   } 
   }

es6 let

   //方法二：var --> let
   for(let i=0; i<tabList.length; i++){
   tabList[i].onclick = function() {
       changeTabHandle(i);
   }
   }

Closure

Method 1:

for(var i=0; i<tabList.length; i++){
     ~function (i) {
         tabList[i].onclick = function () {
             changeTabHandle(i);
         }
     }(i)
 }

Method 2:

 for(var i=0; i<tabList.length; i++){
     tabList[i].onclick = function (i) {
         return function() {
             changeTabHandle(i);
         }
     }(i)
 }

Remember which one was selected last time instead of clearing all custom attributes

beforeIndex = 0;
for(var i=0; i<tabList.length; i++){
tabList[i]._f_index = i;
tabList[i].onclick = function() {
    
    tabList[beforeIndex].className = '';
    pList[beforeIndex].className = '';
    tabList[this._f_index].className = 'active';
    pList[this._f_index].className = 'active';
    beforeIndex = this._f_index;
}
}

Memory last time it was the one that was selected instead of clearing all let

for(let i=0; i<tabList.length; i++){
    tabList[i].onclick = function (params) {
        tabList[beforeIndex].className = '';
        pList[beforeIndex].className = '';
        tabList[i].className = 'active';
        pList[i].className = 'active';
        beforeIndex = i;
    }
}

github example code https://github.com/fung-yu/js... Tab chapter

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