Flexbox - 灵活性
弹性基础
我们使用flex-basis属性来定义弹性项目在分配空间之前的默认大小。
以下示例演示了 flex-basis 属性的用法。在这里,我们创建 3 个彩色框并将其大小固定为 150 像素。
<!doctype html> <html lang = "en"> <style> .box{ font-size:15px; padding:15px; } .box1{background:green; flex-basis:150px; } .box2{background:blue; flex-basis:150px;} .box3{background:red; flex-basis:150px;} .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> </body> </html>
它将产生以下结果 -
弹性增长
我们使用flex-grow属性来设置flex-grow因子。如果容器中空间过多,它会指定特定弹性项目应增长多少。
<!doctype html> <html lang = "en"> <style> .box{ font-size:15px; padding:15px; } .box1{background:green; flex-grow:10; flex-basis:100px; } .box2{background:blue; flex-grow:1; flex-basis:100px; } .box3{background:red; flex-grow:1; flex-basis:100px; } .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> </body> </html>
它将产生以下结果 -
弯曲收缩
我们使用flex-shrink属性来设置flex收缩因子。如果容器中没有足够的空间,它会指定弹性项目应收缩的程度。
<!doctype html> <html lang = "en"> <style> .box{ font-size:15px; padding:15px; } .box1{background:green; flex-basis:200px; flex-shrink:10} .box2{background:blue; flex-basis:200px; flex-shrink:1} .box3{background:red; flex-basis:200px; flex-shrink:1} .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> </body> </html>
它将产生以下结果 -
柔性
有一个简写可以同时为所有这三个属性设置值;它被称为Flex。使用此属性,您可以一次将值设置为 flex-grow、flex-shrink 和 flex-basis 值。这是该属性的语法。
.item { flex: none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ] }