Add named exports for createInstance

package.json

@@ -5,6 +5,13 @@
   "main": "./dist/cjs/i18next.js",
   "module": "./dist/esm/i18next.js",
   "types": "./index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/esm/i18next.mjs",
+      "require": "./dist/cjs/i18next.js",
+      "types": "./index.d.ts"
+    }
+  },
   "keywords": [
     "i18next",
     "internationalization",
@@ -25,15 +32,14 @@
     "@babel/runtime": "^7.12.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.10.1",
-    "@babel/plugin-proposal-async-generator-functions": "^7.2.0",
-    "@babel/plugin-proposal-object-rest-spread": "^7.3.2",
-    "@babel/plugin-transform-modules-commonjs": "^7.2.0",
-    "@babel/plugin-transform-runtime": "^7.2.0",
+    "@babel/core": "^7.16.0",
+    "@babel/plugin-proposal-async-generator-functions": "^7.16.0",
+    "@babel/plugin-transform-modules-commonjs": "^7.16.0",
+    "@babel/plugin-transform-runtime": "^7.16.0",
     "@babel/polyfill": "^7.2.5",
-    "@babel/preset-env": "^7.3.1",
-    "@babel/preset-react": "^7.0.0",
-    "@babel/register": "^7.0.0",
+    "@babel/preset-env": "^7.16.0",
+    "@babel/preset-react": "^7.16.0",
+    "@babel/register": "^7.16.0",
     "@rollup/plugin-babel": "^5.2.2",
     "@rollup/plugin-commonjs": "^17.0.0",
     "@rollup/plugin-node-resolve": "^11.0.0",

rollup.config.js

@@ -18,14 +18,17 @@ const external = (id) => !id.startsWith('.') && !id.startsWith('/') && !id.inclu
 export default [
   {
     input,
-    output: { format: 'cjs', file: pkg.main },
+    output: { format: 'cjs', file: pkg.main, exports: 'default' },
     external,
     plugins: [babel(getBabelOptions({ useESModules: false }))],
   },
 
   {
-    input,
-    output: { format: 'esm', file: pkg.module },
+    input: './src/index.esm.js',
+    output: [
+      { format: 'esm', file: pkg.module },
+      { format: 'esm', file: pkg.exports['.'].import },
+    ],
     external,
     plugins: [babel(getBabelOptions({ useESModules: true }))],
   },

src/i18next.js

@@ -36,8 +36,6 @@ class I18n extends EventEmitter {
     this.logger = baseLogger;
     this.modules = { external: [] };
 
-    bindMemberFunctions(this);
-
     if (callback && !this.isInitialized && !options.isClone) {
       // https://github.com/i18next/i18next/issues/879
       if (!this.options.initImmediate) {
@@ -559,10 +557,7 @@ class I18n extends EventEmitter {
       : 'ltr';
   }
 
-  /* eslint class-methods-use-this: 0 */
-  createInstance(options = {}, callback) {
-    return new I18n(options, callback);
-  }
+  static createInstance = (options = {}, callback) => new I18n(options, callback)
 
   cloneInstance(options = {}, callback = noop) {
     const mergedOptions = { ...this.options, ...options, ...{ isClone: true } };
@@ -599,4 +594,8 @@ class I18n extends EventEmitter {
   }
 }
 
-export default new I18n();
+const instance = I18n.createInstance();
+instance.createInstance = I18n.createInstance;
+bindMemberFunctions(instance);
+
+export default instance;

src/index.esm.js

@@ -0,0 +1,18 @@
+import i18next from './i18next.js';
+
+export default i18next;
+
+export const createInstance = i18next.createInstance;
+
+export const init = i18next.init;
+export const loadResources = i18next.loadResources;
+export const reloadResources = i18next.reloadResources;
+export const use = i18next.use;
+export const changeLanguage = i18next.changeLanguage;
+export const getFixedT = i18next.getFixedT;
+export const t = i18next.t;
+export const exists = i18next.exists;
+export const setDefaultNamespace = i18next.setDefaultNamespace;
+export const hasLoadedNamespace = i18next.hasLoadedNamespace;
+export const loadNamespaces = i18next.loadNamespaces;
+export const loadLanguages = i18next.loadLanguages;