## Box A container that lays out its contents in one direction. Box provides CSS flexbox capabilities for layout, as well as general styling of things like background color, border, and animation. [![](https://cdn-images-1.medium.com/fit/c/120/120/1*TD1P0HtIH9zF0UEH28zYtw.png)](https://storybook.grommet.io/?selectedKind=Box&full=0&addons=0&stories=1&panelRight=0) [![](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/github/grommet/grommet-sandbox?initialpath=box&module=%2Fsrc%2FBox.js) ## Usage ```javascript import { Box } from 'grommet'; ``` ## Properties **a11yTitle** Custom title to be used by screen readers. ``` string ``` **alignSelf** How to align along the cross axis when contained in a Box or along the column axis when contained in a Grid. ``` start center end stretch ``` **gridArea** The name of the area to place this inside a parent Grid. ``` string ``` **margin** The amount of margin around the component. An object can be specified to distinguish horizontal margin, vertical margin, and margin on a particular side. Defaults to `none`. ``` none xxsmall xsmall small medium large xlarge { bottom: xxsmall xsmall small medium large xlarge string, horizontal: xxsmall xsmall small medium large xlarge string, left: xxsmall xsmall small medium large xlarge string, right: xxsmall xsmall small medium large xlarge string, top: xxsmall xsmall small medium large xlarge string, vertical: xxsmall xsmall small medium large xlarge string } string ``` **align** How to align the contents along the cross axis. ``` start center end baseline stretch ``` **alignContent** How to align the contents when there is extra space in the cross axis. Defaults to `stretch`. ``` start center end between around stretch ``` **animation** Animation effect(s) to use. 'duration' and 'delay' should be in milliseconds. 'jiggle' and 'pulse' types are intended for small elements, like icons. ``` fadeIn fadeOut jiggle pulse slideUp slideDown slideLeft slideRight zoomIn zoomOut { type: fadeIn fadeOut jiggle pulse slideUp slideDown slideLeft slideRight zoomIn zoomOut, delay: number, duration: number, size: xsmall small medium large xlarge } [ fadeIn fadeOut jiggle pulse slideUp slideDown slideLeft slideRight zoomIn zoomOut { type: fadeIn fadeOut jiggle pulse slideUp slideDown slideLeft slideRight zoomIn zoomOut, delay: number, duration: number, size: xsmall small medium large xlarge } ] ``` **background** Either a color identifier to use for the background color. For example: 'neutral-1'. Or, a 'url()' for an image. Dark is not needed if color is provided. ``` string { color: string, dark: boolean string, image: string, position: string, opacity: boolean number weak medium strong, repeat: no-repeat repeat string, size: cover contain string, light: string } ``` **basis** A fixed or relative size along its container's main axis. ``` xxsmall xsmall small medium large xlarge xxlarge full 1/2 1/3 2/3 1/4 2/4 3/4 auto string ``` **border** Include a border. ``` boolean top left bottom right horizontal vertical all { color: string { dark: string, light: string }, side: top left bottom right horizontal vertical all, size: xsmall small medium large xlarge string, style: solid dashed dotted double groove ridge inset outset hidden } ``` **direction** The orientation to layout the child components in. Defaults to `column`. ``` row column row-responsive row-reverse column-reverse ``` **elevation** Elevated height above the underlying context, indicated via a drop shadow. Defaults to `none`. ``` none xsmall small medium large xlarge string ``` **flex** Whether flex-grow and/or flex-shrink is true and at a desired factor. ``` grow shrink boolean { grow: number, shrink: number } ``` **fill** Whether the width and/or height should fill the container. ``` horizontal vertical boolean ``` **gap** The amount of spacing between child elements. This should not be used in conjunction with 'wrap' as the gap elements will not wrap gracefully. ``` xxsmall xsmall small medium large xlarge string ``` **height** A fixed height. ``` xxsmall xsmall small medium large xlarge xxlarge string ``` **justify** How to align the contents along the main axis. Defaults to `stretch`. ``` around between center end evenly start stretch ``` **overflow** box overflow. ``` auto hidden scroll visible { horizontal: auto hidden scroll visible, vertical: auto hidden scroll visible } string ``` **pad** The amount of padding around the box contents. An object can be specified to distinguish horizontal padding, vertical padding, and padding on a particular side of the box Defaults to `none`. ``` none xxsmall xsmall small medium large xlarge { bottom: xxsmall xsmall small medium large xlarge string, horizontal: xxsmall xsmall small medium large xlarge string, left: xxsmall xsmall small medium large xlarge string, right: xxsmall xsmall small medium large xlarge string, top: xxsmall xsmall small medium large xlarge string, vertical: xxsmall xsmall small medium large xlarge string } string ``` **responsive** Whether margin, pad, and border sizes should be scaled for mobile environments. Defaults to `true`. ``` boolean ``` **round** How much to round the corners. ``` boolean xsmall small medium large xlarge full string { corner: top left bottom right top-left top-right bottom-left bottom-right, size: xsmall small medium large xlarge string } ``` **tag** The DOM tag to use for the element. NOTE: This is deprecated in favor of indicating the DOM tag via the 'as' property. ``` string function ``` **as** The DOM tag or react component to use for the element. Defaults to `div`. ``` string function ``` **width** A fixed width. ``` xxsmall xsmall small medium large xlarge xxlarge string ``` **wrap** Whether children can wrap if they can't all fit. ``` boolean reverse ``` ## Intrinsic element ``` div ``` ## Theme **global.animation** The animation configuration for the Box. Expects `object`. Defaults to ``` { duration: '1s', jiggle: { duration: '0.1s', }, } ``` **global.borderSize** The possible border sizes in the Box. Expects `object`. Defaults to ``` { xsmall: '1px', small: '2px', medium: '4px', large: '12px', xlarge: '24px, } ``` **global.elevation** The possible shadows in Box elevation. Expects `object`. Defaults to ``` { light: { none: 'none', xsmall: '0px 1px 2px rgba(100, 100, 100, 0.50)', small: '0px 2px 4px rgba(100, 100, 100, 0.50)', medium: '0px 3px 8px rgba(100, 100, 100, 0.50)', large: '0px 6px 12px rgba(100, 100, 100, 0.50)', xlarge: '0px 8px 16px rgba(100, 100, 100, 0.50)', }, dark: { none: 'none', xsmall: '0px 2px 2px rgba(255, 255, 255, 0.40)', small: '0px 4px 4px rgba(255, 255, 255, 0.40)', medium: '0px 6px 8px rgba(255, 255, 255, 0.40)', large: '0px 8px 16px rgba(255, 255, 255, 0.40)', xlarge: '0px 10px 24px rgba(255, 255, 255, 0.40)', }, } ``` **global.colors.border** The color of the border Expects `string | { dark: string, light: string }`. Defaults to ``` { dark: rgba(255, 255, 255, 0.33), light: rgba(0, 0, 0, 0.33), } ``` **global.opacity.medium** The value used when background opacity is set to true. Expects `number`. Defaults to ``` 0.4 ``` **global.size** The possible sizes for width, height, and basis. Expects `object`. Defaults to ``` { xxsmall: '48px', xsmall: '96px', small: '192px', medium: '384px', large: '768px', xlarge: '1152px', xxlarge: '1536px', full: '100%', } ``` **box.extend** Any additional style for the Box. Expects `string | (props) => {}`. Defaults to ``` undefined ``` **box.responsiveBreakpoint** The actual breakpoint to trigger changes in the border, direction, gap, margin, pad, and round. Expects `string`. Defaults to ``` small ``` **global.edgeSize** The possible sizes for any of gap, margin, and pad. Expects `object`. Defaults to ``` { edgeSize: { none: '0px', hair: '1px', xxsmall: '3px', xsmall: '6px', small: '12px', medium: '24px', large: '48px', xlarge: '96px', responsiveBreakpoint: 'small', }, } ``` **global.breakpoints** The possible breakpoints that could affect border, direction, gap, margin, pad, and round. Expects `object`. Defaults to ``` { small: { value: '768px', borderSize: { xsmall: '1px', small: '2px', medium: '4px', large: '6px', xlarge: '12px', }, edgeSize: { none: '0px', hair: '1px', xxsmall: '2px', xsmall: '3px', small: '6px', medium: '12px', large: '24px', xlarge: '48px', }, size: { xxsmall: '24px', xsmall: '48px', small: '96px', medium: '192px', large: '384px', xlarge: '768px', full: '100%', }, }, medium: { value: '1536px', }, large: {}, } ```