diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ef31a34..3c4859c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [2.12.1](https://github.com/lokalise/i18n-ally/compare/v2.12.0...v2.12.1) (2024-01-08)
+
 ## [2.12.0](https://github.com/lokalise/i18n-ally/compare/v2.11.1...v2.12.0) (2023-09-23)
 
 ### ⚡ Features
diff --git a/package.json b/package.json
index b51218fe..a099df7a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "publisher": "lokalise",
   "name": "i18n-ally",
-  "version": "2.12.0",
+  "version": "2.12.1",
   "displayName": "i18n Ally",
   "description": "🌍 All in one i18n extension for VS Code",
   "keywords": [
@@ -21,10 +21,10 @@
     "release:minor": "standard-version --release-as minor && git push --follow-tags",
     "release:patch": "standard-version --release-as patch && git push --follow-tags",
     "gh:release": "conventional-github-releaser -p angular",
-    "build": "rimraf dist && nr i18n:build && nr main:build && nr editor:build && esno scripts/post-build.ts",
+    "build": "export NODE_OPTIONS=--openssl-legacy-provider && rimraf dist && nr i18n:build && nr main:build && nr editor:build && esno scripts/post-build.ts",
     "dev": "run-p *:dev",
-    "main:build": "cross-env I18N_ALLY_ENV=production webpack --mode development",
-    "main:dev": "cross-env I18N_ALLY_ENV=development webpack --mode development --watch --info-verbosity verbose",
+    "main:build": "export NODE_OPTIONS=--openssl-legacy-provider && cross-env I18N_ALLY_ENV=production webpack --mode development",
+    "main:dev": "export NODE_OPTIONS=--openssl-legacy-provider && cross-env I18N_ALLY_ENV=development webpack --mode development --watch --info-verbosity verbose",
     "editor:build": "parcel build src/webview/src/index.html --out-dir dist/editor --no-minify",
     "editor:dev": "nodemon -w src/webview/src -e js,ts,vue,html --exec \"nr editor:build\"",
     "i18n:build": "esno scripts/build-i18n.ts",
diff --git a/src/frameworks/custom.ts b/src/frameworks/custom.ts
index 5fc8af19..b73a2fd9 100644
--- a/src/frameworks/custom.ts
+++ b/src/frameworks/custom.ts
@@ -15,6 +15,13 @@ interface CustomFrameworkConfig {
   refactorTemplates?: string[]
   monopoly?: boolean
 
+  /**
+   * tsFileTemplates:
+   * - 'en/index.ts': "import type { BaseTranslation } from '../i18n-types'\n\nconst en = $1 satisfies BaseTranslation\n\nexport default en\n"
+   * - 'default': "import type { Translation } from '../i18n-types'\n\nexport default $1 satisfies Translation\n"
+   */
+  tsFileTemplates: Record<string, string>[]
+
   keyMatchReg?: string[] | string // deprecated. use "usageMatchRegex" instead
 }
 
@@ -62,6 +69,18 @@ class CustomFramework extends Framework {
     return id
   }
 
+  get tsFileTemplates(): Record<string, string> {
+    const templates = this.data?.tsFileTemplates ?? []
+
+    const result: Record<string, string> = {}
+    for (const teamplate of templates) {
+      const [key, value] = Object.entries(teamplate)[0]
+      result[key] = value
+    }
+
+    return result
+  }
+
   get usageMatchRegex(): string[] {
     let id = this.data?.usageMatchRegex ?? this.data?.keyMatchReg ?? []
     if (typeof id === 'string')
diff --git a/src/parsers/ecmascript.ts b/src/parsers/ecmascript.ts
index 701c0947..bcff72e9 100644
--- a/src/parsers/ecmascript.ts
+++ b/src/parsers/ecmascript.ts
@@ -1,9 +1,10 @@
 import child_process from 'child_process'
 import path from 'path'
 import { Parser } from './base'
-import i18n from '~/i18n'
-import { Log } from '~/utils'
 import { Config, Global } from '~/core'
+import { getFramework } from '~/frameworks'
+import CustomFramework from '~/frameworks/custom'
+import { File, Log } from '~/utils'
 
 const LanguageIds = {
   js: 'javascript',
@@ -16,18 +17,48 @@ const LanguageExts = {
 } as const
 
 export class EcmascriptParser extends Parser {
-  readonly readonly = true
+  readonly readonly = false
+
+  private framework: CustomFramework
 
   constructor(public readonly id: 'js'|'ts' = 'js') {
     super([LanguageIds[id]], LanguageExts[id])
+    this.framework = getFramework('custom') as CustomFramework
   }
 
   async parse() {
     return {}
   }
 
-  async dump() {
-    return ''
+  async dump(object: object) {
+    return JSON.stringify(object, null, 2)
+  }
+
+  async save(filepath: string, object: object): Promise<void> {
+    const templates = this.framework.tsFileTemplates
+
+    let selectedTemplate: string | undefined
+    for (const [key, template] of Object.entries(templates)) {
+      if (filepath.endsWith(key)) {
+        selectedTemplate = template
+        break
+      }
+    }
+
+    if (!selectedTemplate) {
+      if (templates.default)
+        selectedTemplate = templates.default
+    }
+
+    if (!selectedTemplate) {
+      Log.error(`[i18n-ally] no template found for ${filepath}`)
+      return
+    }
+
+    const localization = await this.dump(object)
+    const text = selectedTemplate.replace('$1', localization)
+
+    await File.write(filepath, text)
   }
 
   async load(filepath: string) {
@@ -58,8 +89,4 @@ export class EcmascriptParser extends Parser {
       })
     })
   }
-
-  async save() {
-    Log.error(i18n.t('prompt.writing_js'))
-  }
 }