align-items in CSS Flexbox – How to Layout Flex Children

align-items specify how browsers should position a flexible container's items along the cross-axis of a flexbox.

Flexbox in HTML5: An Overview

CSS Flexbox: Use Display: Flex To Position Two Boxes, PDF

CSS Flexible Box Layout Module Level 1

CSS Flexbox Guide:. Building Flexible Layouts for Beginners…, by Nooruddin saheb

CSS Flexbox 101- Introduction and sample patterns

CSS Flexible Box Layout Module Level 1

Display Flex Align Items: Tutorial (Examples)

Nested Flex Containers with Flexbox

A Complete Guide to Flexbox

Which one should you use? justify/align-content, items or self?

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