# w3c手册

10.5 Content height: the height property

percentage
Specifies a percentage height. The percentage is calculated with respect to the height of the generated box’s containing block. If the height of the containing block is not specified explicitly and this element is not absolutely positioned, the value computes to auto.

auto
The height depends on the values of other properties.

# 参考链接

https://ruirui.me/2018/12/07/flex-grow-child-not-filling-height-of-parent/

https://stackoverflow.com/questions/33636796/chrome-safari-not-filling-100-height-of-flex-parent