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flex-shrink 计算方式

设子元素的flex-shrink之和为 k
设当前子元素flex-shrink为 Ln
现已知

  1. 当k >= 1时
    计算公式:
    子元素宽度 - 权重比 * 多出高度
  2. 当k < 1时
    计算公式:
    子元素宽度 - 权重比 * 多出高度 * k

问:从原理角度是否有一个数学公式统一这两种情况,还是确是通过if-else实现的?

ps: 我感觉是因为某个公式,所以出现这种逻辑;而非特意为了实现这种逻辑而写成这种情况 ,还请指点迷津。


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