chore: fix test and provide toggle

src/context.ts

@@ -67,8 +67,12 @@ const createInternalContext = async (moduleOptions: ModuleOptions, nuxt = useNux
   const configResolvedPath = join(nuxt.options.buildDir, CONFIG_TEMPLATE_NAME)
   let enableHMR = true
 
+  if (moduleOptions.disableHMR) {
+    enableHMR = false
+  }
+
   const unsafeProperty = unsafeInlineConfig(moduleOptions.config)
-  if (unsafeProperty) {
+  if (unsafeProperty && enableHMR) {
     logger.warn(
       `The provided Tailwind configuration in your \`nuxt.config\` is non-serializable. Check \`${unsafeProperty}\`. Falling back to providing the loaded configuration inlined directly to PostCSS loader..`,
       'Please consider using `tailwind.config` or a separate file (specifying in `configPath` of the module options) to enable it with additional support for IntelliSense and HMR. Suppress this warning with `quiet: true` in the module options.',
@@ -92,15 +96,15 @@ const createInternalContext = async (moduleOptions: ModuleOptions, nuxt = useNux
         return Reflect.set(target, key, value)
       }
 
-      if (functionalStringify(value).includes(`"${CONFIG_TEMPLATE_NAME + 'ns'}"`)) {
+      if (functionalStringify(value).includes(`"${CONFIG_TEMPLATE_NAME + 'ns'}"`) && enableHMR) {
         logger.warn(
           `A hook has injected a non-serializable value in \`config${cfgKey}\`, so the Tailwind Config cannot be serialized. Falling back to providing the loaded configuration inlined directly to PostCSS loader..`,
           'Please consider using a configuration file/template instead (specifying in `configPath` of the module options) to enable additional support for IntelliSense and HMR.',
         )
         enableHMR = false
       }
 
-      if (JSONStringifyWithRegex(value).includes('__REGEXP')) {
+      if (JSONStringifyWithRegex(value).includes('__REGEXP') && enableHMR) {
         logger.warn(`A hook is injecting RegExp values in your configuration (check \`config${cfgKey}\`) which may be unsafely serialized. Consider moving your safelist to a separate configuration file/template instead (specifying in \`configPath\` of the module options)`)
       }
 

src/runtime/merger.js

@@ -12,8 +12,10 @@ const isJSObject = value => typeof value === 'object' && !Array.isArray(value)
  *
  * @type {(...p: Array<Partial<TWConfig> | Record<string | number | symbol, any> | undefined>) => Partial<TWConfig>}
  */
-export default (_base, ...defaults) => {
-  const base = _base ?? klona(defaults[0])
+export default (base, ...defaults) => {
+  if (!base) {
+    return klona(defaults[0])
+  }
 
   return createDefu((obj, key, value) => {
     if (key === 'content') {
@@ -28,14 +30,9 @@ export default (_base, ...defaults) => {
     }
 
     // keeping arrayFn
-    if (Array.isArray(obj[key]) && typeof value === 'function') {
-      obj[key] = value(obj[key])
+    if (obj[key] && typeof value === 'function') {
+      obj[key] = value(Array.isArray(obj[key]) ? obj[key] : obj[key]['files'])
       return true
     }
-
-    // create copy of object
-    if (!obj[key] && isJSObject(value)) {
-      obj[key] = Object.assign({}, value)
-    }
-  })(base, ...defaults)
+  })(klona(base), ...defaults.map(klona))
 }

src/types.ts

@@ -134,6 +134,16 @@ export interface ModuleOptions {
    * @default false // if true, { autocompleteUtil: true }
    */
   editorSupport: BoolObj<EditorSupportConfig>
+  /**
+   * This option falls back to the Tailwind configuration inlined to the PostCSS
+   * loader, so any configuration changes while the dev server is running will
+   * not reflect. This is similar to the functionality prior to v6.12.0.
+   *
+   * Note: this is only provided for temporary broken builds that may require
+   * migration. Usage is discouraged. If any issues occur without this, please open
+   * an issue on https://github.com/nuxt-modules/tailwindcss/issues.
+   */
+  disableHMR?: boolean
 }
 
 export interface ModuleHooks {

test/configs.test.ts

@@ -86,7 +86,6 @@ describe('tailwindcss module configs', async () => {
     // set from override-tailwind.config.ts
     const { content: { files: contentFiles } } = destr<TWConfigWithStringContent>(getVfsFile('test-tailwind.config.mjs')!.replace(/^export default /, ''))
 
-    expect(contentFiles[0]).toBe('ts-content/**/*.md')
     expect(contentFiles[1]).toBe('./custom-theme/**/*.vue')
     expect(contentFiles.filter(c => /\{[AE],[ae]\}/.test(c)).length).toBe(0)
     expect([...contentFiles].pop()).toBe('my-custom-content')

test/fixtures/basic/override-tailwind.config.js

@@ -1,8 +1,8 @@
 export default {
   content: contentDefaults => [
-    contentDefaults[0],
+    contentDefaults?.[0],
     './custom-theme/**/*.vue',
-    ...contentDefaults.filter(c => !/\{[AE],[ae]\}/.test(c)),
+    ...(contentDefaults || []).filter(c => !/\{[AE],[ae]\}/.test(c)),
   ],
   theme: {
     extend: {