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代码编辑器：

<!DOCTYPE html>
<meta charset="utf-8"><link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/>
<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>

<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>
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代码编辑器：

运行结果：