如何限制< input type =" file">所以它只能选择.pdf文件？ [英] How to restrict <input type="file"> so that it can only select .pdf files?

问题描述

默认情况下，它可以选择所有类型的文件，如何限制它，以便它只能选择 .pdf 文件？

By default it can select all type of files,how to restrict it so that it can only select .pdf files?

解决方案

接受属性，建议浏览器限制某些类型。但是，您需要在您的服务器端代码中重新验证以确保。永远不要相信客户给你的东西。

You can use the accept attribute on your form to suggest to the browser to restrict certain types. However, you'll want to re-validate in your server-side code to make sure. Never trust what the client sends you.

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