将占位符属性放在文件类型输入字段上 [英] Putting placeholder attribute on file type input field

问题描述

是否有一种方法可以为文件类型的输入字段添加占位符

我已经尝试过jquery水印插件并不起作用。

解决方案

占位符属性不应该用于< input type =file> 。占位符用于提示输入。由于文件输入本身就是一个浏览按钮，显然它是用于选择文件的。如果没有选择文件，它会在按钮旁边显示没有选择文件。

因为：

1. 在某些浏览器中，它只显示为一个按钮。


2. 它已经有默认文本，不能更改。
>

3. 每个浏览器都以自己的方式呈现。


4. IE不支持占位符文本。

Is there a way to put a placeholder for input field which are file type?

I already tried jquery watermark plugin and it doesn't work.

解决方案

Placeholder attribute should not be used for <input type="file">. Placeholders are used to give a hint about the input. And as file input is itself a browse button, it is clearly seen that it is for choosing a file. And if there's no file chosen it shows "no file chosen" next to the button.

Because:

1. In some browsers it just shows up as a button.
2. It already have default text which can not be changed.
3. Each browser renders it in own way.
4. IE will not support placeholder text.

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