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黄色区域为dataArea我在内部设置menu的高度为100%，不生效？？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{
margin:0;
border:0;
padding: 0;
}
html,body{
height: 100%;
}
.content {
height: 100%;
display: flex;
flex-direction: column;
justify-content: flex-start;
}
.content .selectArea {
height: 40px;
border-bottom: 1px solid #ccc;
background: red;
}
.content .dataArea {
flex-grow: 1;
background: yellow;
flex-direction: row;
}
.content .dataArea .menu {
height: 20px;
width: 140px;
font-size: 30px;
background: pink;
}
.content .dataArea .menu text {
display: block;
height: 50px;
text-align: center;
line-height: 50px;
}
.content .dataArea .menuContent {
flex-grow: 1;
height: 100%;
background: pink;
}
</style>
</head>
<body>
<div class='content'>
<div class='selectArea'>
</div>
<div class='dataArea'>
<div class='menu'>
<!-- <text wx:for="{{menu}}" wx:for-item='menuName' wx:key>{{menuName}}</text> -->
</div>
<div class='menuContent'>
</div>
</div>
</div>
</body>
</html>
加个定位试试？