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如何右对齐弹性项目?

position: absolute相比,有没有更多的 flexbox-ish 方式可以使 “Contact” 右对齐?

.main { display: flex; }
.a, .b, .c { background: #efefef; border: 1px solid #999; }
.b { flex: 1; text-align: center; }
.c { position: absolute; right: 0; }
<h2>With title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
    <div class="b"><a href="#">Some title centered</a></div>
    <div class="c"><a href="#">Contact</a></div>
</div>
<h2>Without title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
    <!--<div class="b"><a href="#">Some title centered</a></div>-->
    <div class="c"><a href="#">Contact</a></div>
</div>

http://jsfiddle.net/vqDK9/

答案

更加灵活的方法是使用auto左页边距(与在块格式化上下文中使用时相比,灵活项对自动页边距的处理有些不同)。

.c {
    margin-left: auto;
}

更新的小提琴:

.main { display: flex; }
.a, .b, .c { background: #efefef; border: 1px solid #999; }
.b { flex: 1; text-align: center; }
.c {margin-left: auto;}
<h2>With title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
    <div class="b"><a href="#">Some title centered</a></div>
    <div class="c"><a href="#">Contact</a></div>
</div>
<h2>Without title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
    <!--<div class="b"><a href="#">Some title centered</a></div>-->
    <div class="c"><a href="#">Contact</a></div>
</div>
<h1>Problem</h1>
<p>Is there a more flexbox-ish way to right align "Contact" than to use position absolute?</p>

干得好。在 flex 容器上设置justify-content: space-between

.main { 
    display: flex; 
    justify-content: space-between;
  }
.a, .b, .c { background: #efefef; border: 1px solid #999; }
.b { text-align: center; }
<h2>With title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
    <div class="b"><a href="#">Some title centered</a></div>
    <div class="c"><a href="#">Contact</a></div>
</div>
<h2>Without title</h2>
<div class="main">
    <div class="a"><a href="#">Home</a></div>
<!--     <div class="b"><a href="#">Some title centered</a></div> -->
    <div class="c"><a href="#">Contact</a></div>
</div>

如果要为此使用 flexbox,则应该能够这样做(在容器上display: flex ,在项目flex: 1 .c上显示text-align: right ):

.main { display: flex; }
.a, .b, .c {
    background: #efefef;
    border: 1px solid #999;
    flex: 1;
}
.b { text-align: center; }
.c { text-align: right; }

... 或者作为替代方案(甚至更简单),如果不需要满足这些条件,则可以justify-content: space-between ,并完全删除text-align规则:

.main { display: flex; justify-content: space-between; }
.a, .b, .c { background: #efefef; border: 1px solid #999; }

这是Codepen 上的演示,可让您快速尝试上述操作。