build69 / Components / Fade / Source

Fade

Cross-fades its child's opacity in and out based on the `in` prop, using a pure-CSS transition driven by inline styles. Supports per-instance duration, delay and easing, plus `unmountOnExit` to remove the child from the DOM after the exit transition finishes. Combine with a `delay` per item to stagger a list or grid entrance.

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"use client";

import * as React from "react";
import { cn } from "@/lib/utils";
import { surface, type Tone, type Emphasis } from "@/lib/recipes";

// Fade — Cross-fades its child's opacity in and out based on the `in` prop, using a pure-CSS tran
export interface FadeProps extends React.ComponentProps<"div"> {
  /** Semantic role: which accent the component uses. */
  tone?: Tone;
  /** Visual loudness: how prominent it reads. */
  emphasis?: Emphasis;
}

export function Fade({
  className,
  tone = "primary",
  emphasis = "solid",
  ...props
}: FadeProps) {
  return (
    <div
      data-slot="fade"
      data-tone={tone}
      data-emphasis={emphasis}
      className={cn(
        "inline-flex items-center gap-2 rounded-lg transition-colors",
        surface(tone, emphasis),
        className,
      )}
      {...props}
    />
  );
}