Get the runtime, browser or web worker

runtime.js

function isBun() {
  return Boolean(globalThis.Bun);
}

function isDeno() {
  return Boolean(globalThis.Deno);
}

function isNode() {
  return Boolean(globalThis.process?.versions?.node);
}

function isRuntime() {
  return Boolean(globalThis.process) || isDeno();
}

function isBrowser() {
  return Boolean(globalThis.window) && !isDeno();
}

function isWorker() {
  return typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope;
}

function getEnv() {
  if (isNode()) {
    return "node";
  }

  if (isBun()) {
    return "bun";
  }

  if (isDeno()) {
    return "deno";
  }

  if (isBrowser()) {
    return "browser";
  }

  if (isWorker()) {
    return "worker";
  }

  if (isRuntime()) {
    return "runtime";
  }

  return "unknown";
}