Alert

Display warning messages that require attention.

When To Use

• When you need to show alert messages to users.
• When you need a persistent static container which is closable by user actions.

Examples

• Basic · basic

• More types · style

• Filled · filled

• Closable · closable

• Description · description

• Icon · icon

• Banner · banner

• Loop Banner · loop-banner

• Smoothly Unmount · smooth-closed

• ErrorBoundary · error-boundary

• Custom action · action

• Custom title alignment · custom-title-alignment

• Custom semantic dom styling · style-class

API

Common props ref：Common props

ClosableType

Alert.ErrorBoundary

Semantic DOM

Semantic description source: vendor/components/alert/demo/_semantic.tsx

Design Token

Types, inheritance and declarations retain the pinned native source. Defaults are computed by the native theme and may be overridden by ConfigProvider; this table does not invent static defaults.

Declaration source: vendor/components/alert/style/index.ts

import type { CSSProperties } from 'react';

import type { CSSObject } from '@ant-design/cssinjs';

import { unit } from '@ant-design/cssinjs';

import { genFocusStyle, resetComponent } from '../../style';

import type { FullToken, GenerateStyle, GetDefaultToken } from '../../theme/internal';

import { genStyleHooks } from '../../theme/internal';

export interface ComponentToken {
  // Component token here
  /**
   * @desc 组件圆角
   * @descEN Border radius of alert
   * @since 6.6.0
   */
  borderRadius: CSSProperties['borderRadius'];
  /**
   * @desc 默认内间距
   * @descEN Default padding
   */
  defaultPadding: CSSProperties['padding'];
  /**
   * @desc 带有描述的内间距
   * @descEN Padding with description
   */
  withDescriptionPadding: CSSProperties['padding'];
  /**
   * @desc 带有描述时的图标尺寸
   * @descEN Icon size with description
   */
  withDescriptionIconSize: number | string;
}

type AlertToken = FullToken<'Alert'> & {
  // Custom token here
};

Shared native props

Tips: The following generic properties apply to most antd components; those not supported are described separately.

Install and reproduce an example

npm install antd@6.6.5 @ant-design/icons@6.3.4 dayjs@1.11.23

Use ConfigProvider and native App; configure dayjs locale separately. Each example lists its complete source files and additional pinned dependencies in View code. Example names select demos, not universal component props. See the resource setup guide for theme, locale and SSR.

Native type references

The source viewer includes unchanged native implementations and the following source declarations. Inherited types remain in their native packages. English source comments are preserved as code reference.

• vendor/components/alert/Alert.tsx
• vendor/components/alert/ErrorBoundary.tsx
• vendor/components/alert/index.tsx
• vendor/components/alert/style/index.ts

Source and license

https://github.com/ant-design/ant-design/tree/4a39f54842eade4e565ab336ef6097cd7e723cdd

Original bilingual prose and executable examples are retained. Website-only embeds and token tables are expanded locally. Ant Design is MIT; separately listed dependency notices also apply. Upload previews block outbound requests and do not provide a backend.