Question

如何在html中为框创建内边框？

查看此图片：

Answer 1

看看这个，我们可以使用outline-offset属性

来做到这一点

输出图片看起来像

＆＃13;

.black_box {
    width:500px;
    height:200px;
    background:#000;
    float:left;
    border:2px solid #000;
    outline: 1px dashed #fff;
    outline-offset: -10px;
}

＆＃13;

<div class="black_box"></div>

＆＃13;

Answer 2

使用dashed边框样式进行大纲。
使用background-color或:before伪元素绘制:after。

注意： 此方法可让您获得最大的浏览器支持。

输出图片：

＆＃13;

* {box-sizing: border-box;}

.box {
  border: 1px dashed #fff;
  position: relative;
  height: 160px;
  width: 350px;
  margin: 20px;
}

.box:before {
  position: absolute;
  background: black;
  content: '';
  bottom: -10px;
  right: -10px;
  left: -10px;
  top: -10px;
  z-index: -1;
}

＆＃13;

<div class="box">

</div>

＆＃13;

Answer 3

HTML：

<div class="outerDiv">
    <div class="innerDiv">Content</div>
</div>

CSS：

.outerDiv{
    background: #000;
    padding: 10px;
 }

 .innerDiv{
     border: 2px dashed #fff;
     min-height: 200px; //adding min-height as there is no content inside

 }

Answer 4

请看看

"graphs": [
    // other graphs omitted
  {
    "showBalloon": false, //ensures that no balloon is displayed
    "visibleInLegend": false, //ensures that this graph is not displayed in the legend
    "lineAlpha": 0, //hides the line
    "labelText": "[[value]]", //required for the labelFunction
    "labelFunction": function(graphDataItem, valueText) { //calculates the percent and displays the label
      return ((graphDataItem.dataContext.columnTotal / graphDataItem.dataContext.dataTotal) * 100).toFixed(2) + "%";
    },
    "valueField": "columnTotal"
  }
]

Answer 5

IE不支持outline-offset，因此另一种解决方案是创建2个div标签，一个嵌套到另一个标签中。内部有一个边框，略小于容器。

＆＃13;

.container {
  position: relative;
  overflow: hidden;
  width: 400px;
  height: 100px;
  background: #000000;
  padding: 10px;
}
.inner {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  background: #000000;
  border: 1px dashed #ffffff;
}

＆＃13;

<div class="container">
  <div class="inner"></div>
</div>

＆＃13;

Answer 6

.blackBox {
    width: 100%;
    height: 200px;
    background-color: #000;
    position: relative;
    color: cyan;
    padding: 20px;
    box-sizing: border-box;
}

.blackBox::before {
	position: absolute;
    border: 1px dotted #fff;
    left: 10px;
    right: 10px;
    top: 10px;
    bottom: 10px;
    content: "";
}

<!DOCTYPE html>
<html>
<head>
</head>
<body>

<div class="blackBox">Created an inner border box. <br> Working fine all major browsers.</div>

</body>
</html>

Answer 7

您也可以使用box-shadow并通过border为虚线background-clip添加透明度，以便您看到body background。

例如

h1 {
  text-align: center;
  margin: auto;
  box-shadow: 0 0 0 5px #1761A2;
  border: dashed 3px #1761A2;
  background: linear-gradient(#1761A2, #1761A2) no-repeat;
  background-clip: border-box;
  font-size: 2.5em;
  text-shadow: 0 0 2px white, 0 0 2px white, 0 0 2px white, 0 0 2px white, 0 0 2px white;
  font-size: 2.5em;
  min-width: 12em;
}
body {
  background: linear-gradient(to bottom left, yellow, gray, tomato, purple, lime, yellow, gray, tomato, purple, lime, yellow, gray, tomato, purple, lime);
  height: 100vh;
  margin: 0;
  display: flex;
}
::first-line {
  color: white;
  text-transform: uppercase;
  font-size: 0.7em;
  text-shadow: 0 0
}
code {
  color: tomato;
  text-transform: uppercase;
  text-shadow: 0 0;
}
em {
  mix-blend-mode: screen;
  text-shadow: 0 0 2px white, 0 0 2px white, 0 0 2px white, 0 0 2px white, 0 0 2px white
}

<h1>transparent dashed border<br/>
  <em>with</em> <code>background-clip</code>
</h1>

Pen to play with

在firefox中渲染：

如何在html中为框创建内边框？

7 个答案: