消除对边界角的斜角效应 [英] Removing the Bevel Effect on the Corner of Borders

问题描述

如果元素存在于具有多个边框颜色的页面上，则这些颜色相遇的角落默认创建一个斜角。这似乎是一个奇怪的选择，边角的风格。

为了说明这种效果，请考虑以下几点：

p>

请参阅示例jsFiddle示例，我在此创建了此处。 p>

顶部两个项目显示默认的倾斜行为。底部两个显示所需的预期行为，在这种情况下，边框顶部overpowers或覆盖边框左边和边框右边的角。

顶部大小写的标记：

 < div class =container> 
< div class =border>第一项< / div> 
< div class =border>项目二< / div> 
< / div> 
  

和CSS：

  .container {
 margin：5px; 
 width：150px; 
 background：yellow; 
} 
 .border {
 padding：5px; 
 border：15px solid red; 
 border-top：15px solid teal; 
} 
  

底部标记：

 < div class =container> 
< div class =border-top>< / div> 
< div class =border-reg>第一项< / div> 
< div class =border-top>< / div> 
< div class =border-reg>项目二< / div> 
< / div> 
  

和CSS：

  .border-top {
 border-top：15px solid teal; 
} 
 .border-reg {
 border：15px solid red; 
 border-top：0; 
 padding：5px; 
} 
  

虽然我设计的第二种方法产生了我想要的效果，如果这是不必要的乏味的东西，我会假设有默认状态。如果我想要边框左边重写其他边框，例如，我必须处理一些 float：left 和内联元素疯狂。

问题（最后）

有没有更容易的方法去除在所有浏览器上观察到的默认倾斜行为？ p>

虽然上面详述的情况最容易使边框顶部或边框底部覆盖角落，但它不是一个任务的简单，例如，如果我需要

解决方案

这是边框工作的方式，它是边框左边和边框右边覆盖边框顶部和边框底部。我相信没有办法改变这个没有额外的元素。

而不是空的div，你可以使用wrapper div。

 < div class =outer> 
< div class =inner> test< / div> 
< / div> 
  

  .inner {
 padding：5px; 
 border：15px solid red; 
 border-top：0; 
} 
 .outer {
 border-top：15px solid teal; 
} 
  

演示： http://jsfiddle.net/fmcvY/

还有另一种方法可以用

  
 >< div> test< / div> 
  







  div {
 padding：5px; 
 border：15px solid red; 
 border-top：0; 
 position：relative; 
 padding-top：20px; / *边框宽度加上所需的填充* / 
} 
 div：before {
 content：''; 
 display：block; 
 background：teal; 
 height：15px; 
 padding：0 15px; / * border width加div填充* / 
 width：100％; 
 position：absolute; 
 top：0; 
 left：-15px; / * border width加div填充* / 
} 
  

数目不同的方式实现相同的效果。演示： http://jsfiddle.net/fmcvY/3/

If an element exists on a page with more than one border color, the corner where these colors meet create a bevel by default. This seems like an odd choice for the border-corner style. I would instead prefer that one of the borders "overpowers" the other border such that a straight line is shown instead.

To illustrate this effect, consider the following:

See example jsFiddle example I created here.

The top two items display the default, beveled behavior. The bottom two display the desired, expected behavior, where in this case, border-top "overpowers" or "overrides" the corner of border-left and border-right.

The markup for the top case:

<div class="container">
    <div class="border">Item one</div>
    <div class="border">Item two</div>
</div>

And the CSS:

.container {
    margin : 5px;
    width : 150px;
    background : yellow;
}
.border {
    padding : 5px;
    border : 15px solid red;
    border-top : 15px solid teal;
}

The markup for the bottom case:

<div class="container">
    <div class="border-top"></div>
    <div class="border-reg">Item one</div>
    <div class="border-top"></div>
    <div class="border-reg">Item two</div>
</div>

And the CSS:

.border-top {
    border-top : 15px solid teal;
}
.border-reg {
    border : 15px solid red;
    border-top : 0;
    padding : 5px;
}

Although the second method I devised does produce the effect I want, it seems as if this is unnecessarily tedious for something that I would have assumed to have the default state. If I were to want the border-left to override the other borders, for example, I would have to deal with some float: left and inline element madness.

The Question (Finally)

Is there any easier method of removing the default bevel-behavior observed on all browsers?

Although the case detailed above is mostly easy for having the border-top or border-bottom overriding the corners, it is not as easy of a task, for example, if I need the border-left and border-right to override the border-top and border-bottom.

解决方案

That's the way borders work, I believe there's no way to change this without an extra element.

Instead of empty divs, you can use wrapper divs.

<div class="outer">
    <div class="inner">test</div>
</div>

.inner {
    padding : 5px;
    border : 15px solid red;
    border-top: 0;
}
.outer {
    border-top : 15px solid teal;
}

Demo: http://jsfiddle.net/fmcvY/

There's another way to do it with :before/:after psuedo elements but it's a little messier, however it requires no extra markup:

<div>test</div>

div {
    padding : 5px;
    border : 15px solid red;
    border-top: 0;
    position:relative;
    padding-top: 20px; /* border width plus desired padding */
}
div:before {
    content:' ';
    display:block;
    background: teal;
    height:15px;
    padding:0 15px; /* border width plus div padding */
    width:100%;
    position:absolute;
    top: 0;
    left:-15px; /* border width plus div padding */
}

You can write the CSS in a number of different ways to achieve the same effect. Demo: http://jsfiddle.net/fmcvY/3/

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