Group

Install: npm install @mantine/core@9.7.1 @mantine/hooks@9.7.1

Version and compatibility

Pinned Mantine Core 9.7.1 requires React and React DOM ^19.2.0 and matching @mantine/hooks@9.7.1, from the installed npm package's peerDependencies. Do not force it into React 18 or another incompatible version. Explain upgrade impact and agree on a plan with the project owner; do not hide conflicts with --force/--legacy-peer-deps. The native Provider enables theme.respectReducedMotion and uses forceColorScheme for light/dark.

Use case

Arrange items horizontally with spacing.

Native props used by this example

These props are extracted from the local typechecked JSX and grouped by their owning native component. This is not an exhaustive prop list; see pinned source signatures and inheritance below.

This minimal example passes children only; no additional props are invented. Optional props are in the source reference.

Interaction and state checks

Current scenarios: Default. Check actual behavior after selecting supported disabled/error/read-only scenarios; components without those native states do not receive invented universal props. Verify keyboard focus and exits, then connect changed values through the native callback signature.

Business integration boundary

Demo content/state is local, without server persistence, authorization or fetching. A static display component is not a completed business workflow.

Host setup

Install pinned @mantine/core and @mantine/hooks, import @mantine/core/styles.css at the entry and use MantineProvider. The example's theme/variant are JGuang-authored host props, not universal native component APIs; forceColorScheme synchronizes the app theme. Native implementation source is a reading reference: use npm exports rather than copying internal engines. This batch covers Core, not dates/charts/forms extension packages. Detailed upstream prose remains English.

Runnable usage

import { useState } from 'react';
import * as M from '@mantine/core';
import '@mantine/core/styles.css';


function ComponentPreview({ variant = 'Default' }: { variant?: string }) {

return <M.Group>Build something beautiful / 构建美好的界面</M.Group>;
}
export default function Example({ variant = 'Default', theme = 'light' }: { variant?: string; theme?: 'light' | 'dark' }) {
return <M.MantineProvider forceColorScheme={theme} theme={{ respectReducedMotion: true }}><ComponentPreview variant={variant} /></M.MantineProvider>;
}

Preview states

Default

The example uses the native Mantine API. For supported input demos, change the local variant to Disabled, Invalid or Read only; these are example labels, not new component props. Keep the documented data, controlled values, stores and compound children when adapting the example.

Usage

Group is a horizontal flex container. If you need a vertical flex container, use the Stack component instead. If you need to have full control over flex container properties, use the Flex component.

preventGrowOverflow

The preventGrowOverflow prop allows you to control how Group children should behave when there is not enough space to fit them all on one line. By default, children are not allowed to take more space than (1 / children.length) * 100% of parent width (preventGrowOverflow is set to true). To change this behavior, set preventGrowOverflow to false and children will be allowed to grow and take as much space as they need.

Group children

!important Group works correctly only with React elements. Strings, numbers, fragments may have incorrect styles if the grow prop is set:

// Invalid Group usage, do not do this
import { Group } from '@mantine/core';

function InvalidDemo() {
  return (
    <Group grow>
      First string
      <>
        <div>element inside fragment</div>
        <div>another inside fragment</div>
      </>
      {20}
    </Group>
  );
}

Source-backed parameter reference

Implementation signatures and types are generated from the pinned local source. Optional props, native inherited types, union branches and never exclusions are preserved. A forwardRef implementation's ref is a React reference, not an additional business prop.

Group(_props)

export type GroupStylesNames = 'root';

export type GroupCssVariables = {
  root:
    | '--group-gap'
    | '--group-align'
    | '--group-justify'
    | '--group-wrap'
    | '--group-child-width';
};

export interface GroupStylesCtx {
  childWidth: string;
}

export interface GroupProps extends BoxProps, StylesApiProps<GroupFactory>, ElementProps<'div'> {
  __size?: any;

  /** Controls `justify-content` CSS property @default 'flex-start' */
  justify?: React.CSSProperties['justifyContent'];

  /** Controls `align-items` CSS property @default 'center' */
  align?: React.CSSProperties['alignItems'];

  /** Controls `flex-wrap` CSS property @default 'wrap' */
  wrap?: React.CSSProperties['flexWrap'];

  /** Key of `theme.spacing` or any valid CSS value for `gap`, numbers are converted to rem @default 'md' */
  gap?: MantineSpacing;

  /** Determines whether each child element should have `flex-grow: 1` style @default false */
  grow?: boolean;

  /** Determines whether children should take only dedicated amount of space (`max-width` style is set based on the number of children) @default true */
  preventGrowOverflow?: boolean;
}

export type GroupFactory = Factory<{
  props: GroupProps;
  ref: HTMLDivElement;
  stylesNames: GroupStylesNames;
  vars: GroupCssVariables;
  ctx: GroupStylesCtx;
}>;

export type Mod = Record<string, any> | string;

export type BoxMod = Mod | Mod[] | BoxMod[];

export interface BoxProps extends MantineStyleProps {
  /** Class added to the root element, if applicable */
  className?: string | undefined;

  /** Inline style added to root component element, can subscribe to theme defined on MantineProvider */
  style?: MantineStyleProp;

  /** CSS variables defined on root component element */
  __vars?: CssVarsProp;

  /** `size` property passed down the HTML element */
  __size?: string;

  /** Breakpoint above which the component is hidden with `display: none` */
  hiddenFrom?: MantineBreakpoint;

  /** Breakpoint below which the component is hidden with `display: none` */
  visibleFrom?: MantineBreakpoint;

  /** Determines whether component should be hidden in light color scheme with `display: none` */
  lightHidden?: boolean;

  /** Determines whether component should be hidden in dark color scheme with `display: none` */
  darkHidden?: boolean;

  /** Element modifiers transformed into `data-` attributes, for example, `{ 'data-size': 'xl' }`, falsy values are removed */
  mod?: BoxMod;
}

export type ElementProps<
  ElementType extends React.ElementType,
  PropsToOmit extends string = never,
> = Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>;

export interface CSSProperties extends React.CSSProperties {
  [key: string]: any;
}

type MantineStyle = CSSProperties | ((theme: MantineTheme) => CSSProperties);

export type MantineStyleProp = MantineStyle | MantineStyle[] | MantineStyleProp[] | undefined;

export type CssVariable = `--${string}`;

export type CssVariables<Variable extends string = CssVariable> = Partial<Record<Variable, string>>;

export type CssVars<Variable extends string = CssVariable> =
  | CssVariables<Variable>
  | ((theme: MantineTheme) => CssVariables<Variable>)
  | CssVars<Variable>[];

export type CssVarsProp<Variable extends string = CssVariable> =
  | CssVars<Variable>
  | CssVars<Variable>[];

Native and external types

External types remain defined by React or native dependencies, not manually expanded into guessed props. The installed version's TypeScript definitions are authoritative.

Factory<{
  props: GroupProps;
  ref: HTMLDivElement;
  stylesNames: GroupStylesNames;
  vars: GroupCssVariables;
  ctx: GroupStylesCtx;
}>
MantineStyleProps
React.CSSProperties
MantineTheme
Partial<Record<Variable, string>>
Record<Variable, string>
Variable
MantineBreakpoint
Record<string, any>
StylesApiProps<GroupFactory>
React.ElementType
Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>
React.ComponentProps<ElementType>
ElementType
PropsToOmit
MantineSpacing
HTMLDivElement