代码示例:(标识:css3_flexbox_align-self)
<!DOCTYPE html>
<html>
<head>
<style> 
.flex-container {
  display: -webkit-flex;
  display: flex;
  width: 400px;
  height: 250px;
  background-color: lightgrey;
}

.flex-item {
  background-color: cornflowerblue;
  width: 60px;
  min-height: 100px;
  margin: 10px;
}

.item1 {
  -webkit-align-self: flex-start;
  align-self: flex-start;
}
.item2 {
  -webkit-align-self: flex-end;
  align-self: flex-end;
}

.item3 {
  -webkit-align-self: center;
  align-self: center;
}

.item4 {
  -webkit-align-self: baseline;
  align-self: baseline;
}

.item5 {
  -webkit-align-self: stretch;
  align-self: stretch;
}
</style>
</head>
<body>

<div class="flex-container">
  <div class="flex-item item1">flex-start</div>
  <div class="flex-item item2">flex-end</div>
  <div class="flex-item item3">center</div>
  <div class="flex-item item4">baseline</div>
  <div class="flex-item item5">stretch</div>
</div>

</body>
</html>
运行结果: