Native javascript implements Tab switching function_javascript skills

Analysis of personal code for obtaining class name elements using native JS:

Copy code The code is as follows:

getByClassName:function(className,parent){
            var elem = [],
Node = parent != undefined&&parent.nodeType==1?parent.getElementsByTagName('*'):document.getElementsByTagName('*'),
                   p = new RegExp("(^|\s)" className "(\s|$)");
for(var n=0,i=node.length;n If(p.test(node[n].className)){
                        elem.push(node[n]);
                }
            }
              return elem;
}

The parent parameter is optional, but you need to first determine whether it exists and is a node dom element parent != undefined&&parent.nodeType==1, nodeType == 1 can determine whether the node is a dom element, in the Firefox browser , blank spaces are also considered nodes (.childnodes). Use this attribute to determine whether it is a dom element and exclude whitespace characters.

Remove the class name of the element:

Copy code The code is as follows:

var cur = new RegExp(this.sCur,'g'); //this.sCur is the class name, here it is saved with a variable. For example: this.sCur = "cur";
This.oTab_btn[n].className = this.oTab_btn[n].className.replace(cur,'');

Call example:

Copy code The code is as follows:

   
   
   


   

        使用阅读 ：

        　　  {'tabBtn':'#tabA .tab-i','tabCon':'#tabA .tab-c','cur':'tab-cur'} 【必选】

        　　（1）'tabBtn':'#tabA .tab-i','tabCon':'#tabA .tab-c'　　选择器：只支持 #id　.className，(ID + 空格 + 类名) 【必选】

        　　（2）'cur':'tab-cur'（默认） ：为切换按钮当前状态（类名）【必选】

        　　（3）'type':'mouseover'|| 'clicl' 默认是点击 【可选】
   

   

tabA

    

new LGY_tab({'tabBtn':'#tabA .tab-i',<br>
    'tabCon':'#tabA .tab-c',<br>
    'cur':'tab-cur'<br>
    });<br>
         

   

       

           
• btn-A

           
• btn-B

       

       

con-A

       

con-B

   

   

tabB

    

new LGY_tab({'tabBtn':'#tabB .tab-i',<br>
    'tabCon':'#tabB .tab-k',<br>
    'cur':'tab-cur02',<br>
    'type':'mouseover'<br>
    });<br>
         

   

       

           
• btn-A

           
• btn-B

           
• btn-C

       

       

con-A

       

con-B

       

con-C

   

   
   

JS详细代码：

复制代码 代码如下:

function LGY_tab(option){
    this.oTab_btn = this.getDom(option.tabBtn);//切换点击的元素
    this.oTab_clist = this.getDom(option.tabCon); //切换的内容
    if(!this.oTab_btn || !this.oTab_clist) return;
    this.sCur = option.cur; //激活的状态
    this.type = option.type || 'click';
    this.nLen = this.oTab_btn.length;
    this.int();
}
LGY_tab.prototype = {
    getId:function(id){
        return document.getElementById(id);
    },
    getByClassName:function(className,parent){
        var elem = [],
            node = parent != undefined&&parent.nodeType==1?parent.getElementsByTagName('*'):document.getElementsByTagName('*'),
            p = new RegExp("(^|\s)" className "(\s|$)");
        for(var n=0,i=node.length;n             if(p.test(node[n].className)){
                elem.push(node[n]);
            }
        }
        return elem;
    },
    getDom:function(s){
        var nodeName = s.split(' '),
            p = this.getId(nodeName[0].slice(1)),
            c = this.getByClassName(nodeName[1].slice(1),p);
        if(!p || c.length==0) return null;
        return c;
    },
    change:function(){
        var cur = new RegExp(this.sCur,'g');
        for(var n=0;n             this.oTab_clist[n].style.display = 'none';
            this.oTab_btn[n].className = this.oTab_btn[n].className.replace(cur,'');
        }
    },
    int:function(){
        var that = this;
        this.oTab_btn[0].className = ' ' this.sCur;
        this.oTab_clist[0].style.display = 'block';
        for(var n=0;n             this.oTab_btn[n].index = n;
            this.oTab_btn[n]['on' this.type] = function(){
                that.change();
                that.oTab_btn[this.index].className =' ' that.sCur;
                that.oTab_clist[this.index].style.display = 'block';
            }
        }
    }
}

最终效果图展示：

效果是不是很棒呢，而且兼容性也不错，代码也很简洁，完全可以替代庞大的jQuery选项卡切换插件了。