The difference between flex-basis auto and 0 (zero) [duplicate]

问题

This question already has answers here:

Make flex-grow expand items based on their original size (4 answers)

Closed 2 years ago.

What is the difference between these two values? I've tested numerous examples and they just give the exact same result... Can someone please give me an example where flex-basis: auto; does not give the same result as flex-basis: 0;

回答1:

"0" and "auto" flex-basis will be different in most if not all situations: numeric values are interpreted as specific widths, so zero would be the same as specifying "width: 0" (and thus will collapse the element to its smallest possible width given the content, or to zero itself if its overflow is hidden.)

.f {display:flex}
.f div {border:1px solid}
.zero {flex-basis: 0}
.auto {flex-basis: auto}

<div class="f">
  <div class="zero">This is flex-basis zero</div>
</div>

<div class="f">
  <div class="auto">This is flex-basis auto</div>
</div>

来源：https://stackoverflow.com/questions/47578958/the-difference-between-flex-basis-auto-and-0-zero