Flex With Flexbox

The flex-grow property specifies how much a flex item will grow relative to the rest of the flex items.

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All items have flex grow 0

Item 1
Item 2
Item 3

All items have flex grow 1

Item 1
Item 2
Item 3

Items 1 and 2 grow in the ratio 1:2

Item 1
Item 2
Item 3