Explain the concept of the CSS Flexbox Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report The CSS Flexbox (Flexible Box) model is a layout mechanism that provides a straightforward and efficient way to design complex, responsive, and dynamic web layouts. Introduced to address challenges posed by traditional layout models, Flexbox simplifies the alignment and distribution of space among items within a container, regardless of their size or order. Table of Content Container and ItemsFlex DirectionJustify ContentAlign Items and Align SelfFlex WrapFlex Grow, Shrink, and BasisContainer and ItemsElement TypeDescriptionFlex ContainerThe parent element that contains a group of flex items is known as the flex container. Apply display: flex or display: inline-flex to transform an element into a flex container.Flex ItemsThese are the children of the flex container. These items automatically become flexible boxes, allowing them to adjust to different screen sizes.Flex DirectionDefines the primary axis of the flex container, determining the direction in which flex items are placed. Options include row, column, row-reverse, and column-reverse. Justify ContentSpecifies how flex items are distributed along the main axis. Options include flex-start, flex-end, center, space-between, and space-around. Align Items and Align SelfCSS PropertyDescriptionalign-itemsAligns flex items along the cross-axis of the flex container. Options include flex-start, flex-end, center, stretch, and baseline.align-selfOverrides the default alignment for a specific flex item within the container. Options match align-items values: flex-start, flex-end, center, stretch, and baseline.Flex WrapDetermines whether flex items should wrap into multiple lines if they exceed the container's dimensions. Options include nowrap, wrap, and wrap-reverse. Flex Grow, Shrink, and BasisCSS PropertyDescriptionflex-growDefines the ability of a flex item to grow and fill the available space in the flex container. A higher value indicates a greater ability to grow.flex-shrinkDetermines the ability of a flex item to shrink if there's not enough space in the flex container. A higher value indicates a greater ability to shrink.flex-basisSpecifies the initial size of a flex item before any remaining space is distributed. It sets the starting size of the item in the main axis.Benefits of Flexbox:Responsive Design: Simplifies the creation of responsive layouts that adapt to various screen sizes.Easy Alignment: Facilitates effortless alignment of items both horizontally and vertically.Ordering: Allows reordering of flex items without altering the HTML structure, enhancing flexibility in layout design.Dynamic Sizing: Enables dynamic adjustment of item sizes based on available space. 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