Add Different Margins to Each Side of an Element
说明:
有时你想要自定义元素,使它的每一个边具有不同的 margin。
CSS 允许你使用 margin-top、margin-right、margin-bottom 和 margin-left 来控制元素上右下左四个方向的 margin。
使你的绿方块的顶部和左侧具有 40px 的 margin,而底部和右侧则是 20px。
原始代码:
<style>
.injected-text {
margin-bottom: -25px;
text-align: center;
}
.box {
border-style: solid;
border-color: black;
border-width: 5px;
text-align: center;
}
.yellow-box {
background-color: yellow;
padding: 10px;
}
.red-box {
background-color: red;
margin-top: 40px;
margin-right: 20px;
margin-bottom: 20px;
margin-left: 40px;
}
.green-box {
background-color: green;
}
</style>
<h5 class="injected-text">margin</h5>
<div class="box yellow-box">
<h5 class="box red-box">padding</h5>
<h5 class="box green-box">padding</h5>
</div>
调试代码:
<style>
.injected-text {
margin-bottom: -25px;
text-align: center;
}
.box {
border-style: solid;
border-color: black;
border-width: 5px;
text-align: center;
}
.yellow-box {
background-color: yellow;
padding: 10px;
}
.red-box {
background-color: red;
margin-top: 40px;
margin-right: 20px;
margin-bottom: 20px;
margin-left: 40px;
}
.green-box {
background-color: green;
margin-top:40px;
margin-left:40px;
margin-bottom:20px;
margin-right:20px;
}
</style>
<h5 class="injected-text">margin</h5>
<div class="box yellow-box">
<h5 class="box red-box">padding</h5>
<h5 class="box green-box">padding</h5>
</div>
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