html中input禁用缓存
多数浏览器默认会缓存input的值，只有使用ctl+F5强制刷新的才可以清除缓存记录。
如果不想让浏览器缓存input的值，有2种方法：
input 的属性autocomplete 默认为on
其含义代表是否让浏览器自动记录之前输入的值
很多时候，需要对客户的资料进行保密，防止浏览器软件或者恶意插件获取到
可以在input中加入autocomplete="off" 来关闭记录方法一： 在不想使用缓存的input中添加 autocomplete="off" eg: <input type="text" autocomplete="off" name="test" />
方法二： 在 input 所在的form标签中添加 autocomplete="off"; eg: <form action="#" autocomplete="off"> <input type="text" autocomplete="off" name="test" /> </form>
方法三 不让页面读取缓存数据
<meta http-equiv= "Pragma" content= "no-cache" /> <meta http-equiv= "Cache-Control" content= "no-cache" /> <meta http-equiv= "Expires" content= "0" />
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