Do you remember how a document normally flows? Blocks and text are arranged from left to right and from top to bottom.
Under the traditional block model, the directions “left”, “right”, “top”, and “bottom” cannot be changed. But within a flex container you can modify these concepts, since you can change the typical direction of the flow.
The flexbox uses the concept of the “main axis” instead of the simple directions “left” and “right”. The flex items flow along the main axis from the start to the end of it.
By default, the main axis flows from left to right, but it can be rotated in all directions using the flex-direction property, which is assigned for the flex container. The property values are:
-
row – The default value, whereby the main axis flows from left to right.
-
column — The main axis flows from top to bottom.
-
row-reverse — The main axis flows from right to left.
-
column-reverse — The main axis flows from bottom to top.
Flex items are always arranged along the main axis, regardless of the direction of flow.
We added a main axis indicator to the mini browser. Now you will always know its direction of flow.
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The display: flex property, flex item</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/layout/flexbox-1/flex-direction">2. The flex-direction property, main axis</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/cross-axis">3. The flexbox cross axis</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/justify-content">4. The justify-content property, alignment along the main axis</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/justify-content-flex-start-flex-end">5. The justify-content property: flex-start | flex-end</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/justify-content-space-between-space-around">6. The justify-content property: space-between | space-around</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-items">7. The align-items property, alignment along the cross axis</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-items-flex-start-flex-end">8. The align-items property: flex-start | flex-end</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-items-baseline">9. The align-items: baseline property</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-self">10. The align-self property, or selfish alignment</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-self-baseline">11. The align-self: baseline property</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/creating-simple-palette">12. Test: Creating a simple palette</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flex-wrap">13. The flex-wrap property, overflow of flex items</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flex-wrap-reverse">14. The flex-wrap property, reverse overflow</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-content">15. The align-content property, alignment of flex container lines</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-content-stretch">16. The align-content property: stretch and align-items</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-content-non-stretch">17. The align-content property: non-stretch and align-items</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/align-content-values">18. The align-content property, remaining values</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flexbox-order">19. The order property, the sequence number of the flex item</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/creating-more-complicated-palette">20. Test: Creating a more complicated palette</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flexbox-center-margin-auto">21. Perfect centering by assigning margin: auto to the flex container</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flexbox-center-properties">22. Perfect centering, flex alignment</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/adaptive-menu">23. The adaptive horizontal menu, part 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/adaptive-menu-2">24. The adaptive horizontal menu, part 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/adaptive-menu-3">25. The adaptive horizontal menu, part 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/vertical-row-icons">26. The vertical row of icons</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/vertical-row-icons-2">27. The vertical row of icons, part 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/vertical-row-icons-3">28. The vertical row of icons, part 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/order-elements-css">29. Ordering elements with CSS</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/flexbox-vertical-align">30. Vertically aligning blocks using a flexbox</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/comples-palettes">31. Test: Complex palettes</a></li><li class="main-nav__course-contents-item"><a href="/courses/layout/flexbox-1/summary">32. 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2.79-6.835-.084.354 2.613.43 4.138-1.208 1.078-1.125.446-2-.186-3.375-1.71-3.552-4.585-6.323-7.384-8.918-.716-.69-1.44-2.428-2.706-2-.995.353-.93 3.2-.716 4.073 1.09 7.448 4.065 18.263 4.065 18.263zm37.372-.78c-1.704-1.826-2.822-4.12-3.208-6.585 0 .354-2.614.354-4.056-1.29-.995-1.127-.362-1.86.363-3.117 1.86-3.198 4.863-5.718 7.746-8.136.81-.604 1.627-1.47 2.79-.93.994.428.715 2.334.548 3.115-1.083 5.72-2.48 11.376-4.183 16.943z" fill="#FFF"/><path d="M53.564 20.422c-1.98.51-4.138 1.636-5.105 3.487-.43-2.196 1.645-4.65 3.393-5.832.333-.21.312-.703-.037-.886-.162-.085-.357-.076-.512.022-2.157 1.562-4.417 4.5-3.784 7.188.076.262.354.41.614.325l-.075.28c-.085.603.93.864.994.26.446-2.158 2.706-3.376 4.77-3.897.372-.076.522-.526.27-.81-.133-.15-.342-.204-.53-.138zM17.457 18.06c-.55-.354-.995.428-.55.865 1.433 1.004 3.182 3.05 3.395 4.956-.93-1.86-3.05-2.975-5.105-3.486-.386-.005-.633.41-.445.747.042.076.103.14.176.184 2.073.52 4.324 1.73 4.77 3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">The flex-direction property, main axis</h1><div class="course-theory__content-text"><p>Do you remember how a document normally flows? Blocks and text are arranged from left to right and from top to bottom.</p><p>Under the traditional block model, the directions “left”, “right”, “top”, and “bottom” cannot be changed. But within a flex container you can modify these concepts, since you can change the typical direction of the flow.</p><p>The flexbox uses the concept of the <em>“main axis”</em> instead of the simple directions “left” and “right”. The flex items flow along the main axis from the start to the end of it.</p><p><img src="/assets/courses/26/img/flexbox-1.png" width="600" alt="The flex elements "flow" along the main axis"></p><p>By default, the main axis flows from left to right, but it can be rotated in all directions using the <code>flex-direction</code> property, which is assigned for the flex container. The property values are:</p><ul><li><p><code>row</code> – The default value, whereby the main axis flows from left to right.</p></li><li><p><code>column</code> — The main axis flows from top to bottom.</p></li><li><p><code>row-reverse</code> — The main axis flows from right to left.</p></li><li><p><code>column-reverse</code> — The main axis flows from bottom to top.</p></li></ul><p>Flex items are always arranged along the main axis, regardless of the direction of flow.</p><div class="info info--gray">We added a main axis indicator to the mini browser. Now you will always know its direction of flow.</div></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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