- flex:1实际代表的是三个属性的简写
- flex-grow是用来增大盒子的,比如,当父盒子的宽度大于子盒子的宽度,父盒子的剩余空间可以利用flex-grow来设置子盒子增大的占比
- flex-shrink用来设置子盒子超过父盒子的宽度后,超出部分进行缩小的取值比例
- flex-basis是用来设置盒子的基准宽度,并且basis和width同时存在basis会把width干掉
所以flex:1;的逻辑就是用flex-basis把width干掉,然后再用flex-grow和flex-shrink增大的增大缩小的缩小,达成最终的效果。
flex-grow:1
<!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> .box { width: 500px; height: 100px; background-color: hotpink; display: flex; } .box div { width: 100px; } .box div:nth-child(1) { flex-grow: 1; } .box div:nth-child(2) { flex-grow: 3; } .box div:nth-child(3) { flex-grow: 1; } </style> </head> <body> <div class="box"> <div>1</div> <div>2</div> <div>3</div> </div> </body> </html>
父盒子剩余空间的200
第一个盒子扩大1/5,100+40 = 140
第二个盒子扩大3/5,100+120=220
第三个盒子扩大1/5,100+40= 140
flex-shrink:1
<!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> .box { width: 500px; height: 100px; background-color: hotpink; display: flex; } .box div { width: 200px; } .box div:nth-child(1) { flex-shrink: 1; } .box div:nth-child(2) { flex-shrink: 2; } .box div:nth-child(3) { flex-shrink: 1; } </style> </head> <body> <div class="box"> <div>1</div> <div>2</div> <div>3</div> </div> </body> </html>
父盒子的宽度为500,子盒子的宽度为600,超出100,超出的100,如何进行比例缩放
第一个盒子:1/4 * 100 = 25 最终第一个盒子200-25=175
第二个盒子:2/4 * 100 = 50 最终第二个盒子200-50 = 150
第三个盒子:1/4 * 100 = 25 最终第一个盒子200-25=175
flex-basis:0%
<!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> .box { width: 500px; height: 100px; background-color: hotpink; display: flex; } .box div { width: 100px; } .box div:nth-child(1) { flex-basis: 50px; } .box div:nth-child(2) { flex-basis: 100px; } .box div:nth-child(3) { flex-basis: 50px; } </style> </head> <body> <div class="box"> <div>1</div> <div>2</div> <div>3</div> </div> </body> </html>
这样width的宽度就已经被flex-basis:0%干掉了
标签:box,flex,盒子,basis,width,详解,div,css From: https://www.cnblogs.com/baoxinyu/p/16932345.html