常用的flex布局

文章目录

• • 1. flex布局流式布局自动换行
  • 2. flex布局流式布局自动换行
  • 3. flex横向滚动
  • 4. flex 等分
  • 5. flex百分比布局
  • 6. flex圣杯布局

1. flex布局流式布局自动换行

<!-- 第一种方式: flex布局流式布局自动换行 每行显示3个 -->
<div class="box">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

.box {
  margin: 20px auto auto 100px;
  width: 300px;
  max-height: 600px;
  overflow-x: hidden;
  overflow-y: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  background: #ccc;
}
.box .item {
  width: 90px;
  height: 90px;
  background: orange;
  margin-right: 15px;
  margin-bottom: 15px;
}
.box .item:nth-of-type(3n) {
  margin-right: 0px;
}

2. flex布局流式布局自动换行

<!-- 第二种方式: flex布局流式布局自动换行 每行显示3个 -->
<div class="box5">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

.box5 {
  margin: 20px auto auto 100px;
  display: flex;
  width: 300px;
  height: 200px;
  background-color: skyblue;
  flex-wrap: wrap;
  align-content: flex-start;

  .item {
    background-color: orangered;
    border: 2px solid skyblue;
    flex: 0 1 33.33%;
    height: 50px;
    box-sizing: border-box;
  }
}

3. flex横向滚动

<!-- flex横向滚动 -->
<div class="box1">
  <div class="item1"></div>
  <div class="item1"></div>
  <div class="item1"></div>
  <div class="item1"></div>
</div>

.box1 {
  margin: 20px auto auto 100px;
  width: 300px;
  height: 120px;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  flex-wrap: nowrap;
  background: #ccc;
}
.box1 .item1 {
  width: 90px;
  height: 90px;
  background: orange;
  margin-right: 15px;
  flex-shrink: 0;
}
.box1 .item1:last-of-type {
  margin-right: 0px;
}

4. flex 等分

<!-- flex 等分 -->
<div class="box2">
  <div class="item1">1/3</div>
  <div class="item1">1/3</div>
  <div class="item1">1/3</div>
</div>

.box2 {
  margin: 20px auto auto 100px;
  width: 300px;
  display: flex;
  background: #ccc;
}
.box2 div {
  flex: 1;
  background-color: palevioletred;
  margin: 10px 10px 0px 0px;
  height: 100px;
}
.box2 .item1:last-child {
  margin: 10px 0px 0px 0px;
}

5. flex百分比布局

<!-- flex百分比布局 -->
<div class="box3">
  <div class="item1">70%</div>
  <div class="item2">30%</div>
</div>

.box3 {
  margin: 20px auto auto 100px;
  width: 300px;
  height: 60px;
  display: flex;
  background: #ccc;
}

.box3 .item1 {
  flex: 0 1 70%;
  background-color: violet;
}
.box3 .item2 {
  flex: 0 1 30%;
  background-color: yellowgreen;
}

6. flex圣杯布局

<!-- flex圣杯布局 -->
<div class="box4">
  <div class="header">header</div>
  <div class="main">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <div class="footer">footer</div>
</div>

.box4 {
  margin: 20px auto auto 100px;
  width: 300px;
  height: 300px;
  background: #ccc;
  display: flex;
  flex-direction: column;

  .header,
  .footer {
    height: 50px;
    background-color: bisque;
  }

  .main {
    flex: 1;
    display: flex;
  }

  .left,
  .right {
    flex-basis: 50px;
    background-color: antiquewhite;
  }
  .center {
    flex: 1;
  }
}