app/config/client.ts

import { BuildConfig, getBuildConfig } from "./build";

export function getClientConfig() {
 if (typeof document !== "undefined") {
 // client side
 return JSON.parse(queryMeta("config")) as BuildConfig;
 }

 if (typeof process !== "undefined") {
 // server side
 return getBuildConfig();
 }
}

function queryMeta(key: string, defaultValue?: string): string {
 let ret: string;
 if (document) {
 const meta = document.head.querySelector(
 `meta[name='${key}']`,
 ) as HTMLMetaElement;
 ret = meta?.content ?? "";
 } else {
 ret = defaultValue ?? "";
 }

 return ret;
}