html - flex-flow: column wrap doesn't stretch the parent element's width - Stack Overflow
When I use flex-flow: column wrap, the parent element's width is not stretched. *{ margin: 0; padding: 0; } .box{ background: #f03;
CSS - OrgPad
css - Dynamic width parent with flexbox column wrapping? - Stack Overflow
html - When flexbox items wrap in column mode, container does not
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