next.js/examples/cms-sitecore-xmcloud/src/components/Title.tsx

import React from "react";
import {
  Link,
  Text,
  useSitecoreContext,
  LinkField,
  TextField,
} from "@sitecore-jss/sitecore-jss-nextjs";

interface Fields {
  data: {
    datasource: {
      url: {
        path: string;
        siteName: string;
      };
      field: {
        jsonValue: {
          value: string;
          editable: string;
        };
      };
    };
    contextItem: {
      url: {
        path: string;
        siteName: string;
      };
      field: {
        jsonValue: {
          value: string;
          editable: string;
        };
      };
    };
  };
}

type TitleProps = {
  params: { [key: string]: string };
  fields: Fields;
};

type ComponentContentProps = {
  id: string;
  styles: string;
  children: JSX.Element;
};

const ComponentContent = (props: ComponentContentProps) => {
  const id = props.id;
  return (
    <div className={`component title ${props.styles}`} id={id ? id : undefined}>
      <div className="component-content">
        <div className="field-title">{props.children}</div>
      </div>
    </div>
  );
};

export const Default = (props: TitleProps): JSX.Element => {
  const datasource =
    props.fields?.data?.datasource || props.fields?.data?.contextItem;
  const { sitecoreContext } = useSitecoreContext();

  const text: TextField = {
    value: datasource?.field?.jsonValue?.value,
    editable: datasource?.field?.jsonValue?.editable,
  };
  const link: LinkField = {
    value: {
      href: datasource?.url?.path,
      title: datasource?.field?.jsonValue?.value,
      editable: true,
    },
  };
  if (sitecoreContext.pageState !== "normal") {
    link.value.querystring = `sc_site=${datasource?.url?.siteName}`;
    if (!text.value) {
      text.value = "Title field";
      link.value.href = "#";
    }
  }

  return (
    <ComponentContent
      styles={props.params.styles}
      id={props.params.RenderingIdentifier}
    >
      <>
        {sitecoreContext.pageState === "edit" ? (
          <Text field={text} />
        ) : (
          <Link field={link}>
            <Text field={text} />
          </Link>
        )}
      </>
    </ComponentContent>
  );
};