flex layout the width of the parent element is not stretched out after the flex-flow: column wrap column is changed
1, the parent element is red and there is no limit on width and height,
2, question 1: column wrap; does not automatically open the parent element?
3, question 2: similar to a column after two columns I use the maximum height to achieve, a column to meet the maximum height after the column to continue two. Do you have a better way to implement it?
online code preview
https://jsfiddle.net/p4oLk7dz/5/