负值 margin 与 relative

BFC 2

by Alex Liu

HTML

<div class="container">
  <div class="main"></div>
  <div class="left"></div>
  <div class="right"></div>
</div>

SCSS

.container {
  margin-left: 120px;
  margin-right: 220px;
}

.main {
  float: left;
  width: 100%;
  height: 300px;
  background-color: red;
}

.left {
  float: left;
  width: 100px;
  height: 300px;
  margin-left: -100%;
  position: relative;
  left: -120px;
  background-color: blue;
}

.right{
  float: left;
  width: 200px;
  height: 300px;
  background: #9f9;
  margin-left: -200px;
  position: relative;
  left: 220px;
  
}