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export async function isUp(urlString: string) {    if (!['http://', 'https://'].some(protocol => urlString.startsWith(protocol))) {        urlString = 'https://' + urlString    }
    const url = new URL(urlString)
    return await fetch(url).then((res: Response) => {        res.body?.cancel()        return true    }).catch((res: Response) => {        res.body?.cancel()        return false    })}
if (import.meta.main) {    if (!Deno.args.length) {        Deno.exit(1)    }
    let url = Deno.args[0]    const up = await isUp(url)
    console.log(up ? `✅ - ${url} is up!` : `❌ - ${url} is down!`)}