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align-self简介：可覆盖父元素设置的
algin-items，包括flex-start、flex-end、center、stretch -
align-self使用：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> * { margin: 0; padding: 0; list-style: none; } body { background-color: #eee; font-size: 22px; } h3 { margin: 10px; font-weight: normal; } section { width: 1000px; margin: 0 auto; } ul { background-color: #fff; border: 1px solid #ccc; height: 400px; } ul li { width: 200px; height: 200px; background-color: pink; margin: 10px; } section:nth-child(1) ul { display: flex; /* 侧轴 相当于 垂直方向 */ /* 侧轴对齐方式：从侧轴的开始方向对齐，默认从上到下， 第一排放不下就往下排，还有默认不会在一行放不下的时候自动往下排， 需要配合 flex-wrap: wrap; 才会自动换行 */ align-items: center; } section:nth-child(1) ul li:nth-child(1) { align-self: stretch; height: auto; } section:nth-child(2) ul { display: flex; align-items: flex-start; } section:nth-child(2) ul li:nth-child(2) { align-self: flex-end; } </style> </head> <body> <section> <h3>align-items: center; - align-self: stretch;</h3> <ul> <li>1</li> <li>2</li> <li>3</li> </ul> </section> <section> <h3>align-self: flex-start; - align-self: flex-end; </h3> <ul> <li>1</li> <li>2</li> <li>3</li> </ul> </section> </body> </html> -
demo 效果：
