CSS flex-direction Property
Flex-direction is a sub-property of the flexible box layout module. It established the flexible item's main axis. The primary axis is the flex item's main axis. It is not always horizontal; it is primarily determined by the flex-direction property.
Note: The flex property is ineffective when the element is not a flexible item.
|row||The default value. The flexible items are displayed in a row horizontally.|
|row-reverse||Row is the same as row, but in reverse order.|
|column||The flexible items are arranged in a column and displayed vertically.|
|column-reverse||Column is the same as the row, but in reverse order.|
|initial||This property is set to its default value.|
|inherit||This property is inherited from its parent element.|
|Element||Chrome||Firefox||Safari||Edge / IE||Opera|