CSS 如何覆盖边框：无？
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How to override border:none?
提问by Shpigford
I'm working with some thoroughly awful third-party software and needing to overwrite their CSS styling via an external CSS file.
我正在使用一些非常糟糕的第三方软件，需要通过外部 CSS 文件覆盖它们的 CSS 样式。
They've set border: noneon all form fields, but I'd like to have the input fields just use the browser's default styling.
他们已经设置border: none了所有表单字段，但我希望输入字段只使用浏览器的默认样式。
How can I override the border: noneso that the form fields are styled as if no borderproperty was set?
如何覆盖border: none以便表单字段的样式设置为好像没有border设置属性？
回答by Caleb Hearth
Style the exceptions as border: inherit.
将异常样式设置为border: inherit.
This will override the most recent border rule.
这将覆盖最近的边界规则。
回答by stelar7
You could try setting the value to nothing, if that desnt work, you could try this: how to remove css property using javascript?
您可以尝试将值设置为空，如果 desnt 工作，您可以尝试以下操作： 如何使用 javascript 删除 css 属性？
回答by j08691
Assuming they aren't styling the input fields inline:
假设他们没有内联输入字段的样式：
input {
border: 1px solid #999 !important;
}
回答by Jukka K. Korpela
Unfortunately, there is no way in CSS to say that browser defaults be applied. For example, if any CSS rule sets a border on an element, then you can't say “ignore that rule”; you can only set your own rule that overrides it (if you define your rule so that it wins in the cascade).
不幸的是，在 CSS 中没有办法说应用浏览器默认值。例如，如果任何 CSS 规则在元素上设置了边框，那么您不能说“忽略该规则”；您只能设置自己的规则来覆盖它（如果您定义了规则，使其在级联中获胜）。
In practice, the following creates a border that is close to the defaults of popular browsers:
在实践中，下面创建了一个接近流行浏览器默认值的边框：
input { border: solid 1px #ddd; border-top-color: #aaa; padding: 2px; }
You may need to modify the selector (or even use !important) in order to win a setting in another stylesheet.
您可能需要修改选择器（甚至使用!important）才能赢得另一个样式表中的设置。
