Flex Layout is a layout structure built within VTEX IO Store Framework. It allows building complex custom layouts using the concept of rows and columns, setting the desired block structure and positioning in a page.

Example of a page layout built using Flex Layout, following the one row with two columns model

Flex Layout has two basic building blocks: flex-layout.row and flex-layout.col. You should never use flex-layout.

If you are already familiar with the flexbox layout used in CSS, Flex Layout should be easy to grasp since this is what flex-layout.row and flex-layout.col are using under the hood.

You can use any array of blocks as children for flex-layout.row and flex-layout.col.

The props below support responsive-values, meaning that you can define different values for the same prop based on device screen size, such as mobile and desktop.

Prop name	Type	Description	Default value
blockClass	String	Block container class. The set value of this prop functions as a block identifier for CSS customizations. (	""
borderColor	String	The color of the border.	undefined
borderWidth	0...5	A number or string magnitude for applying the bw Tachyons token to the row.	undefined
border	String | String[]	An array to define on which sides of the row a border should apply (top, right, bottom, left, or all).	undefined
colGap	0...10	A number or string magnitude for applying the pr Tachyons token to the columns in the flex-layout.row.	undefined
colSizing	equal|auto	Controls the width of the columns in the flex-layout.row.	equal
fullWidth	Boolean	Whether the component should occupy all the available width from its parent.	false
horizontalAlign	left|right|center|between|around	Controls horizontal alignment for the items in the flex-layout.row. It defaults to between if colSizing is auto and to left otherwise.	left
colJustify	enum	Controls the space between columns and borders of the flex-layout.row, following the justify-content CSS property. Possible values are between (no space added between borders and columns) and around (space added).	between
marginBottom	0...10	A number or string magnitude for applying the mb Tachyons token to the row.	undefined
marginTop	0...10	A number or string magnitude for applying the mt Tachyons token to the row.	undefined
paddingBottom	0...10	A number or string magnitude for applying the pb Tachyons token to the row.	undefined
paddingTop	0...10	A number or string magnitude for applying the pt Tachyons token to the row.	undefined
preserveLayoutOnMobile	Boolean	Whether the flex-layout.row should break into a column layout on mobile.	false
preventHorizontalStretch	Boolean	Prevents the row from stretching horizontally to fill its parent's width.	false
preventVerticalStretch	Boolean	Prevents the row from stretching vertically to fill its parent's height with the items-stretch token.	false
rowGap	0...10	A number or string magnitude for applying the pb Tachyons token to columns in the flex-layout.row.	undefined
htmlId	String	This prop adds an HTML id to flexRow. This allows accessing a page section using links.	undefined

Prop name	Type	Description	Default value
blockClass	String	Block container class. The set value of this prop functions as a block identifier for CSS customizations	""
borderColor	String	The color of the border.	undefined
borderWidth	0...5	A number or string magnitude for applying the bw Tachyons token to the column.	undefined
border	String | String[]	An array to define on which sides of the row a border should apply (top, right, bottom, left, or all).	undefined
horizontalAlign	left|right|center	Controls horizontal alignment for the items in the flex-layout.col.	left
marginLeft	0...10	A number or string magnitude for applying the ml Tachyons token to the column.	undefined
marginRight	0...10	A number or string magnitude for applying the mr Tachyons token to the column.	undefined
paddingLeft	0...10	A number or string magnitude for applying the pl Tachyons token to the column.	undefined
paddingRight	0...10	A number or string magnitude for applying the pr Tachyons token to the column.	undefined
preventVerticalStretch	Boolean	Prevents the row from stretching vertically to fill its parent's height with height: 100%, using height: "auto" instead.	false
rowGap	0...10	A number or string magnitude for applying the pb Tachyons token to rows in the flex-layout.col.	undefined
verticalAlign	top|middle|bottom	Controls vertical alignment for the items in the flex-layout.col.	top
width	"0...100%"|"grow"	Sets the width of the column. Accepts either a percentage or "grow".	undefined

• The highest level in a flex layout is always a row. Therefore, you can only add a flex-layout.col inside a flex-layout.row — never as a first-level block.
• Every row and column can have as many levels as needed.
• When creating levels, you have to alternate between rows and columns. You can only place columns within a row and rows within a column.
• Keep in mind that the structure that you set in your flex layout does not only affect your code organization, but will also reflect in the way that blocks will be shown and managed through the Site Editor admin. Therefore, it is always important to take the organization of both code and Site Editor into account when planning to apply the flex layout to a page.

To better understand Flex Layout's practical operation, you can access the recipe for Using Flex Layout

To apply CSS customizations to this and other blocks, follow the instructions given in the recipe for Using CSS Handles for store customization.

CSS Handles
flexColChild
flexCol
flexRowContent
flexRow