WIP: Fix for issue 2261

src/index.ts

@@ -2,14 +2,16 @@ import { DOMWrapper } from './domWrapper'
 import { VueWrapper } from './vueWrapper'
 import BaseWrapper from './baseWrapper'
 import { mount, shallowMount } from './mount'
-import { renderToString } from './renderToString'
+import { renderToString as _renderToString } from './renderToString'
 import { MountingOptions } from './types'
 import { RouterLinkStub } from './components/RouterLinkStub'
 import { createWrapperError } from './errorWrapper'
 import { config } from './config'
 import { flushPromises } from './utils/flushPromises'
 import { enableAutoUnmount, disableAutoUnmount } from './utils/autoUnmount'
 
+const isNode = typeof window === 'undefined'
+const renderToString = ( isNode ?  _renderToString  : null)
 export {
   mount,
   shallowMount,

tests/index.jsdom.spec.ts

@@ -0,0 +1,10 @@
+// @vitest-environment jsdom
+import { describe, expect, it } from 'vitest'
+
+import * as exports from '../src/index'
+describe('index.js exports', () => {
+  it('in a browser environment renderToString should not be exported', () => {
+    // data type of null is object
+    expect(typeof exports.renderToString).toEqual('object');
+  });
+})

tests/index.spec.ts

@@ -0,0 +1,9 @@
+// @vitest-environment node
+import { describe, expect, it } from 'vitest'
+
+import * as exports from '../src/index'
+describe('index.js exports', () => {
+  it('in a node environment renderToString should be exported', () => {
+    expect(typeof exports.renderToString).toEqual('function');
+  });
+})