display:none 与 visibility:hidden 区别
display 指定元素显示框架的类型,none 隐藏不占文档流,不会影响布局
visibility 显示或隐藏元素而不更改文档的布局,hidden 相当于此元素变成透明并且 text-indent: -9999px,会影响布局
可以用以下实例进行验证
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| <ul class='item-wrap'>
<li class="style2"> <img src="" alt=""> <div></div> </li> <li class="style3"> <img src="" alt=""> <div></div> </li> <li>last dom</li> </ul>
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| .style1 { width: 30px; height: 100px; background-image: url('http://img0.fengqu-inc.com/cmsres/20190430/2f836f6d-91ed-4c5e-ae2a-81c32357786e.png'); background-repeat: no-repeat; } .style2 { width: 30px; height: 100px; background-image: url('http://img0.fengqu-inc.com/cmsres/20190430/a8c73c89-6175-404a-b2b5-533c05d0f601.png'); background-repeat: no-repeat; display: none; } .style3 { width: 30px; height: 100px; background-image: url('http://img0.fengqu-inc.com/cmsres/20190430/0e16b8ee-4251-456a-bf35-093bace3d252.png'); background-repeat: no-repeat; visibility: hidden; }
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以上三张背景图是否下载 ?(没有在官方文档中找到详细说明,以下仅代表个人实验结果
)