lanternUI
Overlays

Alert Dialog.

A modal that interrupts to confirm an important action. It does not close on outside click, so the reader has to choose.

Installation#

With the CLI

$npx lanterncn add alert-dialog

This also installs the Lantern theme and any Lantern UI components it depends on. The shadcn CLI works directly too: npx shadcn@latest add httptim/lantern-ui/alert-dialog. See Installation if your project is not set up yet.

Manually

  1. Install the dependencies

    npm install radix-ui

  2. Copy the source into your project

    components/ui/alert-dialog.tsx
    "use client";

import * as React from "react";
import { AlertDialog as AlertDialogPrimitive } from "radix-ui";

import { cn } from "@/lib/utils";
import { buttonVariants } from "@/components/ui/button";

function AlertDialog({ ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Root>) {
  return <AlertDialogPrimitive.Root data-slot="alert-dialog" {...props} />;
}

function AlertDialogTrigger({ ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Trigger>) {
  return <AlertDialogPrimitive.Trigger data-slot="alert-dialog-trigger" {...props} />;
}

function AlertDialogPortal({ ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Portal>) {
  return <AlertDialogPrimitive.Portal data-slot="alert-dialog-portal" {...props} />;
}

function AlertDialogOverlay({ className, ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Overlay>) {
  return (
    <AlertDialogPrimitive.Overlay
      data-slot="alert-dialog-overlay"
      className={cn(
        "fixed inset-0 z-50 bg-[#080b0a]/75 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:animate-in data-[state=open]:fade-in-0",
        className,
      )}
      {...props}
    />
  );
}

function AlertDialogContent({ className, ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Content>) {
  return (
    <AlertDialogPortal>
      <AlertDialogOverlay />
      <AlertDialogPrimitive.Content
        data-slot="alert-dialog-content"
        className={cn(
          "fixed top-1/2 left-1/2 z-50 grid max-h-[calc(100dvh-2rem)] w-full max-w-[calc(100%-2rem)] -translate-x-1/2 -translate-y-1/2 gap-5 overflow-y-auto rounded-lg border bg-popover p-6 text-popover-foreground shadow-block-sm duration-200 outline-none sm:max-w-md",
          "data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95",
          className,
        )}
        {...props}
      />
    </AlertDialogPortal>
  );
}

function AlertDialogHeader({ className, ...props }: React.ComponentProps<"div">) {
  return <div data-slot="alert-dialog-header" className={cn("flex flex-col gap-2 text-left", className)} {...props} />;
}

function AlertDialogFooter({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="alert-dialog-footer"
      className={cn("flex flex-col-reverse gap-2 sm:flex-row sm:justify-end", className)}
      {...props}
    />
  );
}

function AlertDialogTitle({ className, ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Title>) {
  return (
    <AlertDialogPrimitive.Title
      data-slot="alert-dialog-title"
      className={cn("font-display text-xl leading-tight font-medium tracking-tight", className)}
      {...props}
    />
  );
}

function AlertDialogDescription({
  className,
  ...props
}: React.ComponentProps<typeof AlertDialogPrimitive.Description>) {
  return (
    <AlertDialogPrimitive.Description
      data-slot="alert-dialog-description"
      className={cn("text-sm leading-relaxed text-muted-foreground", className)}
      {...props}
    />
  );
}

function AlertDialogAction({
  className,
  variant = "default",
  ...props
}: React.ComponentProps<typeof AlertDialogPrimitive.Action> & {
  variant?: "default" | "destructive";
}) {
  return (
    <AlertDialogPrimitive.Action
      data-slot="alert-dialog-action"
      className={cn(
        buttonVariants({ variant: "default" }),
        variant === "destructive" && "bg-destructive text-destructive-foreground hover:bg-destructive/85",
        className,
      )}
      {...props}
    />
  );
}

function AlertDialogCancel({ className, ...props }: React.ComponentProps<typeof AlertDialogPrimitive.Cancel>) {
  return (
    <AlertDialogPrimitive.Cancel
      data-slot="alert-dialog-cancel"
      className={cn(buttonVariants({ variant: "secondary" }), className)}
      {...props}
    />
  );
}

export {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogOverlay,
  AlertDialogPortal,
  AlertDialogTitle,
  AlertDialogTrigger,
};

  3. Update the import paths to match your project

    The source imports cn from @/lib/utils and uses button.

Usage#

import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogOverlay,
  AlertDialogPortal,
  AlertDialogTitle,
  AlertDialogTrigger,
} from "@/components/ui/alert-dialog";
<AlertDialog>
  <AlertDialogTrigger asChild>
    <Button variant="destructive">Unpublish site</Button>
  </AlertDialogTrigger>
  <AlertDialogContent>
    <AlertDialogHeader>
      <AlertDialogTitle>Unpublish site?</AlertDialogTitle>
      <AlertDialogDescription>Visitors will see a dead link.</AlertDialogDescription>
    </AlertDialogHeader>
    <AlertDialogFooter>
      <AlertDialogCancel>Cancel</AlertDialogCancel>
      <AlertDialogAction variant="destructive">Unpublish</AlertDialogAction>
    </AlertDialogFooter>
  </AlertDialogContent>
</AlertDialog>

AlertDialogAction takes variant="destructive" for a filled red confirm button.