my_digital_garden/quartz/components/Date.tsx

import { GlobalConfiguration } from "../cfg"
import { QuartzPluginData } from "../plugins/vfile"

interface Props {
  date: Date
}

export type ValidDateType = keyof Required<QuartzPluginData>["dates"]

export function getDate(cfg: GlobalConfiguration, data: QuartzPluginData): Date | undefined {
  if (!cfg.defaultDateType) {
    throw new Error(`Field 'defaultDateType' was not set in the configuration object of quartz.config.ts. See https://quartz.jzhao.xyz/configuration#general-configuration for more details.`)
  }
  return data.dates?.[cfg.defaultDateType]
}

export function formatDate(d: Date): string {
  return d.toLocaleDateString("en-US", {
    year: "numeric",
    month: "short",
    day: "2-digit",
  })
}

export function Date({ date }: Props) {
  return <>{formatDate(date)}</>
}