Science Knowings: CSS Course For Social Media

CSS Flexbox

From CSS Float to Flexbox

CSS Float was a revolutionary layout technique, but it has its limitations. Flexbox, the modern alternative, offers a more intuitive and powerful approach to layout design.

Introduction to Flexbox

Flexbox is a CSS layout module that provides a flexible and efficient way to arrange elements on a page. It allows you to create complex layouts with minimal effort.

Why CSS Flexbox?

Flexbox offers several advantages over other layout techniques:

  • Simplicity: Easy to learn and use.
  • Flexibility: Adapt layouts to different screen sizes and devices.
  • Cross-Browser Support: Widely supported by modern browsers.

Flex Containers and Items

Flexbox introduces the concept of containers and items. A container element wraps around the items that you want to arrange.

Flex Direction

Flex direction defines the main axis along which the items are arranged. You can set it to row (horizontal) or column (vertical).

Justify Content

Justify content aligns the items along the main axis. Options include flex-start, center, flex-end, and space-around.

Align Items

Align items aligns the items perpendicular to the main axis. Options include flex-start, center, flex-end, and stretch.

Flex Wrap

Flex wrap controls how items wrap within the container. Set it to wrap to allow items to wrap to the next line when space runs out.

Align Content

Align content aligns the lines of items within the container. Options include flex-start, center, flex-end, and space-around.


Order controls the order in which items appear in the layout. You can specify a specific order or use auto to maintain the source order.


Gap adds space between the items. You can use gap to set the spacing for all directions or row-gap and column-gap to set spacing for specific directions.

Flex Grow and Flex Shrink

Flex grow and flex shrink control how items grow or shrink to fill available space within the container.

Using Flexbox in Practical Layouts

Flexbox can be used to create a wide variety of layouts, including headers, footers, navigation menus, sliders, and more.

Advantages of Flexbox


  • Easy to use: Intuitive syntax and simple concepts.
  • Responsive: Adapts layouts to different screen sizes.
  • Supports complex layouts: Create complex layouts with minimal code.
  • Performance: Faster than table-based layouts.

Disadvantages of Flexbox


  • Browser support: Not fully supported by older browsers.
  • Can be tricky: Advanced features require a deeper understanding.

Next Up: CSS Grid

In our next session, we'll explore CSS Grid, a more advanced layout technique that provides even greater control. Follow us to learn more!