Babel

Author: schmidt-sebastian

packages/firestore/.babelrc

@@ -0,0 +1,10 @@
+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "useBuiltIns": "false"
+      }
+    ]
+  ]
+}

packages/firestore/package.json

@@ -49,8 +49,10 @@
     "@firebase/app-types": "0.x"
   },
   "devDependencies": {
+    "@babel/preset-env": "7.9.0",
     "protobufjs": "6.8.9",
     "rollup": "2.0.6",
+    "rollup-plugin-babel": "4.4.0",
     "rollup-plugin-copy-assets": "1.1.0",
     "rollup-plugin-json": "4.0.0",
     "rollup-plugin-node-resolve": "5.2.0",

packages/firestore/rollup.config.js

@@ -24,6 +24,7 @@ import copy from 'rollup-plugin-copy-assets';
 import sourcemaps from 'rollup-plugin-sourcemaps';
 import typescript from 'typescript';
 import { terser } from 'rollup-plugin-terser';
+import babel from 'rollup-plugin-babel';
 
 import pkg from './package.json';
 import memoryPkg from './memory/package.json';
@@ -99,19 +100,6 @@ export function resolveMemoryExterns(deps, externsId, referencedBy) {
   return deps.some(dep => externsId === dep || externsId.startsWith(`${dep}/`));
 }
 
-const es5BuildPlugins = [
-  typescriptPlugin({
-    typescript,
-    tsconfigOverride: {
-      compilerOptions: {
-        allowJs: true
-      }
-    },
-    include: ["*.js", "**/*.js"],
-  }),
-  sourcemaps()
-];
-
 const es2017BuildPlugins = [
   typescriptPlugin({
     typescript,
@@ -159,7 +147,7 @@ const browserBuilds = [
   {
     input: pkg.esm2017,
     output: { file: pkg.module, format: 'es', sourcemap: true },
-    plugins: es5BuildPlugins
+    plugins: [babel(), sourcemaps()]
   },
   // ES5 ESM Build (memory-only)
   {
@@ -169,13 +157,13 @@ const browserBuilds = [
       format: 'es',
       sourcemap: true
     },
-    plugins: es5BuildPlugins
+    plugins: [babel(), sourcemaps()]
   },
   // ES5 CJS Build (with persistence)
   {
     input: pkg.esm2017,
     output: { file: pkg.browser, format: 'cjs', sourcemap: true },
-    plugins: es5BuildPlugins
+    plugins: [babel(), sourcemaps()]
   },
   // ES5 CJS Build (memory-only)
   {
@@ -185,7 +173,7 @@ const browserBuilds = [
       format: 'cjs',
       sourcemap: true
     },
-    plugins: es5BuildPlugins
+    plugins: [babel(), sourcemaps()]
   }
 ];