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Web Storage是HTML5中引入的一项功能，它允许我们在浏览器中存储数据。通过使用Web Storage，我们可以在浏览器关闭后，仍然保持数据的持久性。这对于在网页应用程序中存储用户首选项、本地缓存数据或临时保存数据等场景非常有用。
Web Storage有两种主要的存储方式：localStorage和sessionStorage。localStorage提供了一个持久的存储区域，而sessionStorage提供了一个会话级别的存储区域。本文将重点介绍localStorage，但是大部分的代码示例同样适用于sessionStorage。
使用localStorage进行存储非常简单。我们可以使用setItem方法将数据存储到localStorage中，使用getItem方法获取存储的数据，使用removeItem方法删除特定的数据，或者使用clear方法清空整个localStorage。
下面是一些常见的localStorage操作示例：
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