Improve IE11 compatibility by tranforming for-of loops with babel (#3167

)

Fixed: improved browser compatibility by transforming the code with `@babel/preset-env`.

.babelrc.js

@@ -1,19 +1,13 @@
-const presets = ['@babel/preset-typescript']
-const plugins = [
-  '@babel/plugin-transform-block-scoping',
-  '@babel/plugin-transform-template-literals',
-  '@babel/plugin-transform-arrow-functions',
-  '@babel/plugin-transform-parameters',
-  '@babel/plugin-transform-destructuring',
-  '@babel/plugin-proposal-optional-chaining',
-  '@babel/plugin-proposal-class-properties',
-  '@babel/plugin-proposal-object-rest-spread',
-  '@babel/plugin-transform-shorthand-properties',
-  '@babel/plugin-proposal-nullish-coalescing-operator',
+const presets = [
+  [
+    '@babel/preset-env',
+    { modules: process.env.BABEL_ENV === 'esm' ? false : 'auto' },
+  ],
+  '@babel/preset-typescript',
 ]
+const plugins = ['@babel/plugin-proposal-class-properties']
 
 if (process.env.BABEL_ENV !== 'esm') {
-  plugins.push('@babel/plugin-transform-modules-commonjs')
   plugins.push('babel-plugin-add-module-exports')
 }
 

package.json

@@ -37,23 +37,19 @@
       "git add"
     ]
   },
+  "browserslist": [
+    "last 1 version",
+    "> 1%",
+    "IE 11"
+  ],
   "dependencies": {},
   "devDependencies": {
     "@babel/cli": "^7.13.10",
     "@babel/core": "^7.13.10",
     "@babel/node": "^7.13.10",
     "@babel/plugin-proposal-class-properties": "^7.16.7",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.16.7",
-    "@babel/plugin-proposal-object-rest-spread": "^7.13.8",
-    "@babel/plugin-proposal-optional-chaining": "^7.12.7",
-    "@babel/plugin-transform-arrow-functions": "^7.2.0",
-    "@babel/plugin-transform-block-scoping": "^7.5.5",
-    "@babel/plugin-transform-destructuring": "^7.5.0",
-    "@babel/plugin-transform-modules-commonjs": "^7.5.0",
-    "@babel/plugin-transform-parameters": "^7.4.4",
-    "@babel/plugin-transform-template-literals": "^7.4.4",
-    "@babel/preset-env": "^7.11.5",
-    "@babel/preset-typescript": "^7.13.0",
+    "@babel/preset-env": "^7.18.10",
+    "@babel/preset-typescript": "^7.18.6",
     "@date-fns/date-fns-scripts": "0.0.6",
     "@octokit/core": "^3.2.5",
     "@types/jest": "^26.0.23",