feat: add nullish coalescing & optional chaining

ClarkSource · Feb 26, 2020 · ed65923 · ed65923
1 parent d5e65aa
commit ed65923
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Showing 3 changed files with 14 additions and 1 deletion.
diff --git a/src/index.js b/src/index.js
@@ -29,6 +29,15 @@ module.exports = {
       use: {
         loader: 'babel-loader-8',
         options: {
+          plugins: [
+            // Transpile new syntax, which is apparently not yet handled by
+            // `@babel/preset-env`.
+            // @see https://github.com/typed-ember/ember-cli-typescript/blob/b2e75abc98beefe635b6cfd8808c887813acb44e/ts/addon.ts#L89-L94
+            require.resolve('@babel/plugin-proposal-optional-chaining'),
+            require.resolve(
+              '@babel/plugin-proposal-nullish-coalescing-operator'
+            )
+          ],
           presets: [
             // Transpile TypeScript
             require.resolve('@babel/preset-typescript'),

diff --git a/src/package.json b/src/package.json
@@ -16,6 +16,8 @@
     "lint:js": "eslint --ext ts,js ."
   },
   "dependencies": {
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.3",
+    "@babel/plugin-proposal-optional-chaining": "^7.8.3",
     "@babel/preset-env": "^7.8.4",
     "@babel/preset-typescript": "^7.8.3"
   },

diff --git a/tests/ts-module-b/some/nested-file.ts b/tests/ts-module-b/some/nested-file.ts
@@ -1 +1,3 @@
-export const works = () => true;
+const foo = { bar: { baz: undefined } };
+
+export const works = foo.bar?.baz ?? (() => true);