What is Flexbox?

Flexbox is a layout used to flexible and responsive structures. It is declared using display: flex.

Following are some of the most commonly used Flexbox properties:

• flex-direction

flex-direction is used to specify the directions in which the items inside the flexbox are placed. It can take the values:

flex-direction: row

The contents will be placed from left to right. This is the default value of flex-direction.

flex-direction: column

The contents will be placed from top to bottom.

flex-direction: row-reverse

The contents will be placed from right to left.

flex-direction: column-reverse

The contents will be placed from bottom to top.

• flex-wrap

flex-wrap is used to determine whether the flex container will be single line or multi-line. The direction of the cross-axis can also be changed using flex-wrap.

flex-wrap can take the following values:

flex-wrap: nowrap

The container will be single-lined. This is the default value.

flex-wrap: wrap

The container will be multi-lined.

flex-wrap: wrap-reverse

The container will be multi-lined and the direction of the cross-axis is opposite of it's original direction.

• justify-content

justify-content is used to align the contents of the container along the main axis. It can take the following values:

justify-content: flex-start

Items are aligned towards the start of the main axis. This is the default value.

justify-content: flex-end

Items are aligned towards the end of the main axis.

justify-content: center

Items are aligned at the center of the main axis.

justify-content: space-between

Items are distributed evenly along the main axis.

justify-content: space-around

Items are spaced with half-size spaces on either end.

justify-content: space-evenly

Items are distributed evenly along the main axis with full-sized space on both sides.

• align-content

align-content is used to align items along the cross-axis. It also has similar properties to justify-content like flex-start, flex-end, space-between, space-around and center, barring the following exception:

align-content: stretch

Items stretch along the cross axis to take the remaining space.

• align-items

  align-items is used to align items relative to each using their edges and center axis. It can take the following values:

align-items: auto

Defers cross-axis alignment control to the value of align-items on the parent container.

align-items: flex-start

Aligns top edges of items align the top edge of the line.

align-items: flex-end

Aligns bottom edges of items align the bottom edge of the line.

align-items: center

Aligns items along their center axis.

align-items: baseline

Items align such that their baselines align.

align-items: stretch

Items are stretches along the cross axis.

• flex-grow and flex-shrink

flex-grow determines how much of the remaining space in the flex container should be assigned to an item.

On the other hand, if the size of all flex items put together is larger than the size of the flex container, flex-shrink is used to decide the factor by which a number shrinks.

Numbers are passed as values to flex-grow and flex-shrink