new: Allow JSON files to be imported. (#34)

* fix: Add `babelrcRoots` to root babel config.

* fix: Add `babelrcRoots` to root babel config.

* Start on.

* Add snapshots.

* Update docs.

package.json

@@ -110,6 +110,7 @@
     "@microsoft/api-extractor": "^7.13.2",
     "@rollup/plugin-babel": "^5.3.0",
     "@rollup/plugin-commonjs": "^17.1.0",
+    "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^11.2.0",
     "babel-plugin-transform-async-to-promises": "^0.8.15",
     "builtin-modules": "^3.2.0",

src/rollup/config.ts

@@ -4,13 +4,18 @@ import nodePolyfills from 'rollup-plugin-polyfill-node';
 import visualizer from 'rollup-plugin-visualizer';
 import { getBabelInputPlugin, getBabelOutputPlugin } from '@rollup/plugin-babel';
 import commonjs from '@rollup/plugin-commonjs';
+import json from '@rollup/plugin-json';
 import resolve from '@rollup/plugin-node-resolve';
 import { getBabelInputConfig, getBabelOutputConfig } from '../babel/config';
 import type { BundleArtifact } from '../BundleArtifact';
 import { EXCLUDE, EXTENSIONS } from '../constants';
 import { BundleBuild, FeatureFlags, Format } from '../types';
 
-const sharedPlugins = [resolve({ extensions: EXTENSIONS, preferBuiltins: true }), commonjs()];
+const sharedPlugins = [
+  resolve({ extensions: EXTENSIONS, preferBuiltins: true }),
+  commonjs(),
+  json({ compact: true, namedExports: false }),
+];
 
 function getRollupModuleFormat(format: Format): ModuleFormat {
   if (

tests/__fixtures__/examples/data.json

@@ -0,0 +1,8 @@
+{
+  "list": ["foo", "bar", "baz"],
+  "number": 123,
+  "string": "abc",
+  "object": {
+    "foo": true
+  }
+}

tests/__fixtures__/examples/json-imports.ts

@@ -0,0 +1,4 @@
+// @ts-ignore
+import data from './data.json';
+
+export const keys = Object.keys(data);

tests/babel/__snapshots__/config.test.ts.snap

@@ -68,6 +68,7 @@ Object {
 exports[`createRootConfig() returns the correct config 1`] = `
 Object {
   "babelrc": true,
+  "babelrcRoots": Array [],
   "overrides": Array [
     Object {
       "presets": Array [