Alert

Keep an important status message visible within the page.

View component source ↗

Preview

Example

A minimal example to get started.

Changes saved

Your preferences are ready for the next session.

Installation

Install this component and its dependencies in a project initialized with shadcn.

pnpm dlx shadcn@latest add https://ui.hyunjoon.net/r/alert.json

Usage

This is the basic example. Use the Code tab above for the selected example. Adjust import aliases to match your project.

import { Alert, AlertTitle, AlertDescription } from "@/components/ui/alert";

export default function Example() {
  return (
    <Alert className="max-w-sm">
      <AlertTitle>Changes saved</AlertTitle>
      <AlertDescription>Your preferences are ready for the next session.</AlertDescription>
    </Alert>
  );
}

API reference

Derived from the installed component types. Native DOM props are also supported where applicable. A dash means no explicit default is documented. Some props depend on the selected mode.

Alert

Alert properties
Prop	Type	Default	Description
`ref`	React.Ref<HTMLDivElement> \| undefined React.Ref<HTMLDivElement> \| undefined	`—`	Allows getting a ref to the component instance. Once the component unmounts, React will set `ref.current` to `null` (or call the ref with `null` if you passed a callback ref).
`defaultChecked`	boolean \| undefined boolean \| undefined	`—`	Initial checked state for an uncontrolled control.
`defaultValue`	string \| number \| readonly string[] \| undefined string \| number \| readonly string[] \| undefined	`—`	Initial value for an uncontrolled component.
`className`	string \| undefined string \| undefined	`—`	Additional CSS classes merged with the component styles.
`id`	string \| undefined string \| undefined	`—`	Unique identifier used to associate labels and descriptions.
`children`	React.ReactNode React.ReactNode	`—`	Content rendered inside this component.
`onFocus`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control receives focus.
`onBlur`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control loses focus.
`onChange`	React.ChangeEventHandler<HTMLDivElement, Element> \| undefined React.ChangeEventHandler<HTMLDivElement, Element> \| undefined	`—`	Called when the underlying form control changes; inspect the event for its value.
`onKeyDown`	React.KeyboardEventHandler<HTMLDivElement> \| undefined React.KeyboardEventHandler<HTMLDivElement> \| undefined	`—`	Called when a key is pressed while this element is focused.
`onClick`	React.MouseEventHandler<HTMLDivElement> \| undefined React.MouseEventHandler<HTMLDivElement> \| undefined	`—`	Called when the element is activated.
`variant`	"default" \| "destructive" \| null \| undefined "default" \| "destructive" \| null \| undefined	`—`	Visual treatment of the component.

AlertTitle

AlertTitle properties
Prop	Type	Default	Description
`ref`	React.Ref<HTMLDivElement> \| undefined React.Ref<HTMLDivElement> \| undefined	`—`	Allows getting a ref to the component instance. Once the component unmounts, React will set `ref.current` to `null` (or call the ref with `null` if you passed a callback ref).
`defaultChecked`	boolean \| undefined boolean \| undefined	`—`	Initial checked state for an uncontrolled control.
`defaultValue`	string \| number \| readonly string[] \| undefined string \| number \| readonly string[] \| undefined	`—`	Initial value for an uncontrolled component.
`className`	string \| undefined string \| undefined	`—`	Additional CSS classes merged with the component styles.
`id`	string \| undefined string \| undefined	`—`	Unique identifier used to associate labels and descriptions.
`children`	React.ReactNode React.ReactNode	`—`	Content rendered inside this component.
`onFocus`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control receives focus.
`onBlur`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control loses focus.
`onChange`	React.ChangeEventHandler<HTMLDivElement, Element> \| undefined React.ChangeEventHandler<HTMLDivElement, Element> \| undefined	`—`	Called when the underlying form control changes; inspect the event for its value.
`onKeyDown`	React.KeyboardEventHandler<HTMLDivElement> \| undefined React.KeyboardEventHandler<HTMLDivElement> \| undefined	`—`	Called when a key is pressed while this element is focused.
`onClick`	React.MouseEventHandler<HTMLDivElement> \| undefined React.MouseEventHandler<HTMLDivElement> \| undefined	`—`	Called when the element is activated.

AlertDescription

AlertDescription properties
Prop	Type	Default	Description
`ref`	React.Ref<HTMLDivElement> \| undefined React.Ref<HTMLDivElement> \| undefined	`—`	Allows getting a ref to the component instance. Once the component unmounts, React will set `ref.current` to `null` (or call the ref with `null` if you passed a callback ref).
`defaultChecked`	boolean \| undefined boolean \| undefined	`—`	Initial checked state for an uncontrolled control.
`defaultValue`	string \| number \| readonly string[] \| undefined string \| number \| readonly string[] \| undefined	`—`	Initial value for an uncontrolled component.
`className`	string \| undefined string \| undefined	`—`	Additional CSS classes merged with the component styles.
`id`	string \| undefined string \| undefined	`—`	Unique identifier used to associate labels and descriptions.
`children`	React.ReactNode React.ReactNode	`—`	Content rendered inside this component.
`onFocus`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control receives focus.
`onBlur`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control loses focus.
`onChange`	React.ChangeEventHandler<HTMLDivElement, Element> \| undefined React.ChangeEventHandler<HTMLDivElement, Element> \| undefined	`—`	Called when the underlying form control changes; inspect the event for its value.
`onKeyDown`	React.KeyboardEventHandler<HTMLDivElement> \| undefined React.KeyboardEventHandler<HTMLDivElement> \| undefined	`—`	Called when a key is pressed while this element is focused.
`onClick`	React.MouseEventHandler<HTMLDivElement> \| undefined React.MouseEventHandler<HTMLDivElement> \| undefined	`—`	Called when the element is activated.

AlertAction

AlertAction properties
Prop	Type	Default	Description
`ref`	React.Ref<HTMLDivElement> \| undefined React.Ref<HTMLDivElement> \| undefined	`—`	Allows getting a ref to the component instance. Once the component unmounts, React will set `ref.current` to `null` (or call the ref with `null` if you passed a callback ref).
`defaultChecked`	boolean \| undefined boolean \| undefined	`—`	Initial checked state for an uncontrolled control.
`defaultValue`	string \| number \| readonly string[] \| undefined string \| number \| readonly string[] \| undefined	`—`	Initial value for an uncontrolled component.
`className`	string \| undefined string \| undefined	`—`	Additional CSS classes merged with the component styles.
`id`	string \| undefined string \| undefined	`—`	Unique identifier used to associate labels and descriptions.
`children`	React.ReactNode React.ReactNode	`—`	Content rendered inside this component.
`onFocus`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control receives focus.
`onBlur`	React.FocusEventHandler<HTMLDivElement> \| undefined React.FocusEventHandler<HTMLDivElement> \| undefined	`—`	Called when the control loses focus.
`onChange`	React.ChangeEventHandler<HTMLDivElement, Element> \| undefined React.ChangeEventHandler<HTMLDivElement, Element> \| undefined	`—`	Called when the underlying form control changes; inspect the event for its value.
`onKeyDown`	React.KeyboardEventHandler<HTMLDivElement> \| undefined React.KeyboardEventHandler<HTMLDivElement> \| undefined	`—`	Called when a key is pressed while this element is focused.
`onClick`	React.MouseEventHandler<HTMLDivElement> \| undefined React.MouseEventHandler<HTMLDivElement> \| undefined	`—`	Called when the element is activated.

Usage notes

Pair a short title with actionable supporting text. Use an alert dialog when the user must make a decision.