isNode

Checks whether the code is currently running in a Node.js-like environment (process.versions.node is defined — also true in Electron’s Node context).

Note: some hybrid test environments (e.g. happy-dom, jsdom) define both window and Node’s process at the same time — this only reports on process.versions.node’s presence, it does not imply isBrowser is false. Use both together if you need to distinguish plain Node.js from a DOM-emulating Node test environment.

Available since v3.0.3

Import

import { isNode } from '@helpers4/guard';
// or, from the all-in-one package (same code, one install):
import { isNode } from 'helpers4/guard';

Signature

isNode(): boolean

Returns

boolean — true if process.versions.node is defined

Examples

Branch on the runtime environment

Useful for isomorphic code that behaves differently on the server vs. the browser.

if (isNode()) {
  const fs = await import('node:fs')
  // server-side file access
}

Source

View source on GitHub