next.js/examples/cms-payload/components/Link/index.tsx

import Link from "next/link";
import React from "react";
import { Page } from "../../payload-types";
import { Button } from "../Button";

type CMSLinkType = {
  type?: "custom" | "reference";
  url?: string;
  newTab?: boolean;
  reference?: {
    value: string | Page;
    relationTo: "pages";
  };
  label?: string;
  appearance?: "default" | "primary" | "secondary";
  children?: React.ReactNode;
  className?: string;
};

export const CMSLink: React.FC<CMSLinkType> = ({
  type,
  url,
  newTab,
  reference,
  label,
  appearance,
  children,
  className,
}) => {
  const href =
    type === "reference" &&
    typeof reference?.value === "object" &&
    reference.value.slug
      ? `/${reference.value.slug}`
      : url;

  if (!appearance) {
    const newTabProps = newTab
      ? { target: "_blank", rel: "noopener noreferrer" }
      : {};

    if (type === "custom") {
      return (
        <a href={url} {...newTabProps} className={className}>
          {label && label}
          {children && children}
        </a>
      );
    }

    if (href) {
      return (
        <Link href={href} className={className} {...newTabProps}>
          {label && label}
          {children && children}
        </Link>
      );
    }
  }

  const buttonProps = {
    newTab,
    href,
    appearance,
    label,
  };

  return <Button className={className} {...buttonProps} el="link" />;
};