Flexbox - 对齐项目
align-items 属性与 justify content 相同。但此处，项目在交叉访问中对齐(垂直)。
用法 −
align-items: flex-start | flex-end | center | baseline | stretch;
此属性接受以下值 −
flex-start − 弹性项目在容器顶部垂直对齐。
flex-end − 弹性项目在容器底部垂直对齐。
flex-center −弹性项目垂直对齐在容器的中心。
stretch − 弹性项目垂直对齐，使其填满容器的整个垂直空间。
baseline − 弹性项目对齐，使其文本的基线沿水平线对齐。
flex-start
将此值传递给属性 align-items 后，弹性项目垂直对齐在容器的顶部。
以下示例演示了将值 flex-start 传递给 align-items 属性的结果。
<!doctype html>
<html lang = "en">
<style>
.box1{background:green;}
.box2{background:blue;}
.box3{background:red;}
.box4{background:magenta;}
.box5{background:yellow;}
.box6{background:pink;}
.box{
font-size:35px;
padding:15px;
}
.container{
display:flex;
height:100vh;
align-items:flex-start;
}
</style>
<body>
<div class = "container">
<div class = "box box1">One</div>
<div class = "box box2">two</div>
<div class = "box box3">three</div>
<div class = "box box4">four</div>
<div class = "box box5">five</div>
<div class = "box box6">six</div>
</div>
</body>
</html>
它将产生以下结果 −
flex-end
将此值传递给属性 align-items 后，弹性项目将在容器底部垂直对齐。
以下示例演示了将值 flex-end 传递给 align-items 属性的结果。
<!doctype html>
<html lang = "en">
<style>
.box1{background:green;}
.box2{background:blue;}
.box3{background:red;}
.box4{background:magenta;}
.box5{background:yellow;}
.box6{background:pink;}
.box{
font-size:35px;
padding:15px;
}
.container{
display:flex;
height:100vh;
align-items:flex-end;
}
</style>
<body>
<div class = "container">
<div class = "box box1">One</div>
<div class = "box box2">two</div>
<div class = "box box3">three</div>
<div class = "box box4">four</div>
<div class = "box box5">five</div>
<div class = "box box6">six</div>
</div>
</body>
</html>
它将产生以下结果 −
center
将此值传递给属性 align-items 后，弹性项目将垂直对齐在容器的中心。
以下示例演示了将值 flex-center 传递给 align-items 属性的结果。
<!doctype html>
<html lang = "en">
<style>
.box1{background:green;}
.box2{background:blue;}
.box3{background:red;}
.box4{background:magenta;}
.box5{background:yellow;}
.box6{background:pink;}
.box{
font-size:35px;
padding:15px;
}
.container{
display:flex;
height:100vh;
align-items:center;
}
</style>
<body>
<div class = "container">
<div class = "box box1">One</div>
<div class = "box box2">two</div>
<div class = "box box3">three</div>
<div class = "box box4">four</div>
<div class = "box box5">five</div>
<div class = "box box6">six</div>
</div>
</body>
</html>
它将产生以下结果 −
stretch
将此值传递给属性 align-items 后，弹性项目将垂直对齐，从而填满容器的整个垂直空间。
以下示例演示了将值 stretch 传递给 align-items 属性的结果。
<!doctype html>
<html lang = "en">
<style>
.box1{background:green;}
.box2{background:blue;}
.box3{background:red;}
.box4{background:magenta;}
.box5{background:yellow;}
.box6{background:pink;}
.box{
font-size:35px;
padding:15px;
}
.container{
display:flex;
height:100vh;
align-items:stretch;
}
</style>
<body>
<div class = "container">
<div class = "box box1">One</div>
<div class = "box box2">two</div>
<div class = "box box3">three</div>
<div class = "box box4">four</div>
<div class = "box box5">five</div>
<div class = "box box6">six</div>
</div>
</body>
</html>
它将产生以下结果 −
baseline
将此值传递给属性 align-items 后，弹性项目将对齐，使得其文本的基线沿水平线对齐。
以下示例演示了将值 baseline 传递给 align-items 属性的结果。
<!doctype html>
<html lang = "en">
<style>
.box1{background:green;}
.box2{background:blue;}
.box3{background:red;}
.box4{background:magenta;}
.box5{background:yellow;}
.box6{background:pink;}
.box{
font-size:35px;
padding:15px;
}
.container{
display:flex;
height:100vh;
align-items:baseline;
}
</style>
<body>
<div class = "container">
<div class = "box box1">One</div>
<div class = "box box2">two</div>
<div class = "box box3">three</div>
<div class = "box box4">four</div>
<div class = "box box5">five</div>
<div class = "box box6">six</div>
</div>
</body>
</html>
它将产生以下结果 −
