What is CSS flexbox?

Answer:

CSS3 Flexible boxes also known as CSS Flexbox, is a new layout mode in CSS3.

The CSS3 flexbox is used to make the elements behave predictably when they are used with different screen sizes and different display devices. It provides a more efficient way to layout, align and distribute space among items in the container.

It is mainly used to make CSS3 capable to change its item?s width and height to best fit for all available spaces. It is preferred over block model.

The CSS3 flexbox contains flex containers and flex items.

Flex container:The flex container specifies the properties of the parent. It is declared by setting the display property of an element to either flex or inline-flex.

Flex items:The flex items specify properties of the children. There may be one or more flex items inside a flex container.