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                # flex 容器交叉軸項目對齊 ## 1. `align-items`屬性 - 該屬性僅適用于: 單行容器 - 當容器中交叉軸方向上存在剩余空間時, 該屬性才有意義 | 序號 | 屬性值 | 描述 | | ---- | ---------------- | ---------------------------- | | 1 | `flex-start`默認 | 與交叉軸起始線對齊 | | 2 | `flex-end` | 與交叉軸終止線對齊 | | 3 | `center` | 與交叉軸中間線對齊: 居中對齊 | --- ## 2. 示例 ![](https://img.kancloud.cn/20/fc/20fcebe02618bd9d27aa0e5e41094ab6_386x248.jpg) ```html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>flex 容器交叉軸項目對齊</title> <style> /* 容器尺寸 */ .container { width: 300px; height: 150px; } /* flex容器 */ .container { display: flex; } /* flex 容器交叉軸項目對齊*/ /* 當容器中交叉軸方向上存在剩余空間時, 該屬性才有意義 */ /* align-items屬性僅適用于: 單行容器 */ .container { /* 默認: 所有項目與交叉軸起始線對齊 */ align-items: flex-start; /* 所有項目與交叉軸終止線對齊 */ align-items: flex-end; /* 所有項目與交叉軸中間線對齊: 居中對齊 */ align-items: center; } /* flex項目 */ .item { width: 50px; height: 50px; background-color: lightcyan; font-size: 1.5rem; } </style> </head> <body> <div class="container"> <div class="item">1</div> <div class="item">2</div> <div class="item">3</div> <div class="item">4</div> </div> </body> </html> ```
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