当我做boostrap时,我必须使用类"行"...
当你看我的测试设计时:

为什么我被强制保留-30px的保证金?
有了这个html,我希望3行共享每列33%的整个可用宽度:
<div class="container">
<div class="row">
<div style="background-color: pink;" class="span4">
This is a label
</div>
<div style="background-color: violet;" class="span4">
This is a textbox
</div>
<div style="background-color: slateblue;" class="span4">
This is a button
</div>
</div>
<div class="row">
<div style="background-color: orange;" class="span4">
This is a label
</div>
<div style="background-color: orangered;" class="span4">
This is a textbox
</div>
<div style="background-color: yellow;" class="span4">
This is a button
</div>
</div>
<div class="row">
<div style="background-color: seagreen;" class="span4">
This is a label
</div>
<div style="background-color: green;" …Run Code Online (Sandbox Code Playgroud) 为什么Bootstrap行元素具有margin-left: -15px和margin-right: -15px?当row元素嵌套到col-**-*元素中时,它甚至会在其官方站点上突出显示。使嵌套row不突出其父项的最佳方法是什么col-**-*?