Flexbox resizing
问题 I'm trying to come up with an effective way of defining a nested flexbox and allow it to be resized. I think it's almost there: http://jsfiddle.net/6j10L3x2/1/ I'm using three custom elements purely to make the mark-up more declarative: flex, flex-item, flex-resizer A flex represents the container. A flex-item presents an element within the container, and flex-resizer represents a resizer widget which can be placed between two flex-items to add resizing functionality between them. This all