feat: add fallback for util.styleText on Node <20.12.0

Author: emiliosheinz

packages/preview-server/src/actions/render-email-by-path.tsx

@@ -2,7 +2,6 @@
 
 import fs from 'node:fs';
 import path from 'node:path';
-import { styleText } from 'node:util';
 import logSymbols from 'log-symbols';
 import ora, { type Ora } from 'ora';
 import {
@@ -15,6 +14,7 @@ import { convertStackWithSourceMap } from '../utils/convert-stack-with-sourcemap
 import { createJsxRuntime } from '../utils/create-jsx-runtime';
 import { getEmailComponent } from '../utils/get-email-component';
 import { registerSpinnerAutostopping } from '../utils/register-spinner-autostopping';
+import { styleText } from '../utils/style-text';
 import type { ErrorObject } from '../utils/types/error-object';
 
 export interface RenderedEmailMetadata {

packages/preview-server/src/utils/style-text.ts

@@ -0,0 +1,11 @@
+/**
+ * Centralized fallback for Node versions (<20.12.0) without util.styleText.
+ * Returns the original text when styleText is unavailable.
+ */
+import * as nodeUtil from 'node:util';
+
+type StyleTextFunction = (style: string, text: string) => string;
+
+export const styleText: StyleTextFunction = (nodeUtil as any).styleText
+  ? (nodeUtil as any).styleText
+  : (_: string, text: string) => text;

packages/react-email/src/utils/preview/start-dev-server.ts

@@ -1,13 +1,13 @@
 import http from 'node:http';
 import path from 'node:path';
 import url from 'node:url';
-import { styleText } from 'node:util';
 import { createJiti } from 'jiti';
 import logSymbols from 'log-symbols';
 import ora from 'ora';
 import { registerSpinnerAutostopping } from '../../utils/register-spinner-autostopping.js';
 import { getPreviewServerLocation } from '../get-preview-server-location.js';
 import { packageJson } from '../packageJson.js';
+import { styleText } from '../style-text.js';
 import { getEnvVariablesForPreviewApp } from './get-env-variables-for-preview-app.js';
 import { serveStaticFile } from './serve-static-file.js';
 

packages/react-email/src/utils/style-text.ts

@@ -0,0 +1,11 @@
+/**
+ * Centralized fallback for Node versions (<20.12.0) without util.styleText.
+ * Returns the original text when styleText is unavailable.
+ */
+import * as nodeUtil from 'node:util';
+
+type StyleTextFunction = (style: string, text: string) => string;
+
+export const styleText: StyleTextFunction = (nodeUtil as any).styleText
+  ? (nodeUtil as any).styleText
+  : (_: string, text: string) => text;