let i18nextBrowserLanguageDetector detect the lang

node_modules/i18next-browser-languagedetector/rollup.config.js

@@ -0,0 +1,31 @@
+import babel from 'rollup-plugin-babel';
+import uglify from 'rollup-plugin-uglify';
+import nodeResolve from 'rollup-plugin-node-resolve';
+import { argv } from 'yargs';
+
+const format = argv.format || argv.f || 'iife';
+const compress = argv.uglify;
+
+const babelOptions = {
+  exclude: 'node_modules/**',
+  presets: [['es2015', { modules: false }], 'stage-0'],
+  babelrc: false
+};
+
+const dest = {
+  amd: `dist/amd/i18nextBrowserLanguageDetector${compress ? '.min' : ''}.js`,
+  umd: `dist/umd/i18nextBrowserLanguageDetector${compress ? '.min' : ''}.js`,
+  iife: `dist/iife/i18nextBrowserLanguageDetector${compress ? '.min' : ''}.js`
+}[format];
+
+export default {
+  entry: 'src/index.js',
+  format,
+  plugins: [
+    babel(babelOptions),
+    nodeResolve({ jsnext: true })
+  ].concat(compress ? uglify() : []),
+  moduleName: 'i18nextBrowserLanguageDetector',
+  // moduleId: 'i18nextBrowserLanguageDetector',
+  dest
+};