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本文深度剖析了 CSS Flexbox 布局中的 flex 简写属性及其三个核心构成部分：flex-grow, flex-shrink 和 flex-basis。内容系统性地阐述了 Flexbox 的弹性尺寸算法，解释了这些属性如何协同工作以分配容器空间，并重点分析了 flex: 1 的行为及其在多行换行（flex-wrap）布局中的局限性，最后将其与 CSS Grid 进行了对比。
Flex-basis
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