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                            # 側邊欄折疊卡頓

## 11.21.側邊欄折疊卡頓

將admin.css中的這部分代碼注釋掉就不會卡頓了：

~~~

.layui-layout-admin .layui-body > .layui-tab > .layui-tab-content > .layui-tab-item {
    position: absolute;
    bottom: 0;
    right: 0;
    top: 0;
    left: 0;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    /*display: block;
    visibility: hidden;
    opacity: 0;
    filter: Alpha(opacity=0);*/
}

.layui-layout-admin .layui-body > .layui-tab > .layui-tab-content > .layui-tab-item.layui-show {
    /*visibility: visible;
    opacity: 1;
    filter: Alpha(opacity=100);*/
}

~~~

這部分代碼的作用是選項卡未選中時是沒有寬高的，所以里面的表格table無法分配列寬，當選項卡選中的時候表格會重新分配列寬，滾動條會閃一下，  
這段代碼可解決此問題，但是打開選項卡過多后折疊側邊欄會卡頓，詳細你可以去了解`display: none`和`visibility: hidden`的區別。
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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