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js tab encapsulation tutorial

Jul 21, 2017 pm 05:47 PM
javascript Summarize

The structure of the html corresponding to this plug-in is as follows 

<div class=&#39;box&#39; id=&#39;tabFir&#39;>
        <ul id=&#39;tabOptions&#39;>
            <li class=&#39;select&#39;>页卡一</li>
            <li>页卡二</li>
            <li>页卡三</li>
        </ul>
        <div class=&#39;select&#39;>
            <div>1</div>
            <div>2</div>
            <div>3</div>
            <div>4</div>
        </div>
        <div>内容二</div>
        <div>内容三</div>
    </div>
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Version 1

//实现一个选项卡封装:我们可以分析出,只要多个选项卡的主体结构一样,那么每个实现的思想都是一样的,唯一不一样的就是最外层的盒子不一样~function(){/*tabChange:封装一个选项卡的插件,只要大结构保持统一,以后实现选项卡的功能,只需要调取这个方法执行即可实现
        param:container当前要实现选项卡的这个容器
               defaultIndex:默认选中项的索引*/function tabChange(container,defaultIndex){var tabFirst = utils.firstChild(container),oLis = utils.children(tabFirst);var divList = utils.children(container,"div");//让defaultIndex对应的页卡有选中的样式defaultIndex = defaultIndex || 0;
        utils.addClass(oLis[defaultIndex],"select");
        utils.addClass(divList[defaultIndex],"select");//具体的切换功能for(var i = 0;i<oLis.length;i++){
            oLis[i].onclick = function(){
                utils.addClass(this,"select");var curSiblings = utils.siblings(this);for(var i = 0;i<curSiblings.length;i++){
                    utils.removeClass(curSiblings[i],"select")
                }var index = utils.index(this);for(var i = 0;i<divList.length;i++){
                    i===index ? utils.addClass(divList[i],"select") : utils.removeClass(divList[i],"select")
                }
            }    
        }
        
    }
    window.fTab = tabChange
    
}()
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Version 2 (Change the for loop to use event delegation)

//实现一个选项卡封装:我们可以分析出,只要多个选项卡的主体结构一样,那么每个实现的思想都是一样的,唯一不一样的就是最外层的盒子不一样~function(){/*tabChange:封装一个选项卡的插件,只要大结构保持统一,以后实现选项卡的功能,只需要调取这个方法执行即可实现
        param:container当前要实现选项卡的这个容器
               defaultIndex:默认选中项的索引*/function tabChange(container,defaultIndex){var tabFirst = utils.firstChild(container),oLis = utils.children(tabFirst);var divList = utils.children(container,"div");//让defaultIndex对应的页卡有选中的样式defaultIndex = defaultIndex || 0;
        utils.addClass(oLis[defaultIndex],"select");
        utils.addClass(divList[defaultIndex],"select");//具体的切换功能        
        //使用事件委托优化
        tabFirst.onclick = function(e){
            e = e || window.event;
            e.target = e.target || e.srcElement;if(e.target.tagName.toLowercase()==="li"){//说明当前点击的是li标签                detailFn.call(e.target,oLis,divList);

            }
        }
    }function detailFn(oLis,divList){var index = utils.index(this);
        utils.addClass(this,"select");for(var i = 0;i<oLis.length;i++){
            i!==index?utils.removeClass(oLis[i],"select"):null;
            i===index ? utils.addClass(divList[i],"select") : utils.removeClass(divList[i],"select");
        }
    }
    window.fTab = tabChange
    
}()
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Version 3: Object-oriented approach , use the constructor

//实现一个选项卡封装:我们可以分析出,只要多个选项卡的主体结构一样,那么每个实现的思想都是一样的,唯一不一样的就是最外层的盒子不一样~function(){/*tabChange:封装一个选项卡的插件,只要大结构保持统一,以后实现选项卡的功能,只需要调取这个方法执行即可实现
        param:container当前要实现选项卡的这个容器
               defaultIndex:默认选中项的索引*/function TabChange(container,defaultIndex){this.init(container,defaultIndex);

    }
    TabChange.prototype = {
        constructor:TabChange,//注意重写原型方法,需要重新指定构造器//初始化 ,也是当前插件的唯一入口init:function(container,defaultIndex){this.container = container || null;this.defaultIndex = defaultIndex || 0;this.tabFirst = utils.firstChild(this.container);this.oLis = utils.children(this.tabFirst);this.divList = utils.children(this.container,"div");this.defaultIndexEven();this.liveClick();return this;
        },//事件委托实现绑定切换liveClick:function(){var _this = this;this.tabFirst.onclick = function(e){
                e = e || window.event;
                e.target = e.target || e.srcElement;if(e.target.tagName.toLowercase()==="li"){//说明当前点击的是li标签                    _this.detailFn(e.target);

                }
            }
        },
        detailFn:function(curEle){var index = utils.index(curEle);
            utils.addClass(curEle,"select");for(var i = 0;i<this.oLis.length;i++){
                i!==index?utils.removeClass(this.oLis[i],"select"):null;
                i===index ? utils.addClass(this.divList[i],"select") : utils.removeClass(this.divList[i],"select");
            }
        },//按照索引来设置默认选中的页卡defaultIndexEven:function(){
            utils.addClass(this.oLis[this.defaultIndex],"select");
            utils.addClass(this.divList[this.defaultIndex],"select");
        }

    }
    window.fTab = TabChange
    
}()//使用var box1 = new fTab(boxList[0],0)
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