From f32d5debda1c9b63d89a5b95fd0be0781253d05d Mon Sep 17 00:00:00 2001
From: Rafael Salguero Iturrios <rafaelsalgueroiturrios@gmail.com>
Date: Thu, 9 Jul 2020 17:32:05 -0500
Subject: [PATCH] Typescript transform now removes generic arguments from
 optional calls (Fixes #11813) (#11816)

---
 packages/babel-plugin-transform-typescript/src/index.js       | 4 ++++
 .../test/fixtures/type-arguments/optional-call/input.ts       | 1 +
 .../test/fixtures/type-arguments/optional-call/output.js      | 1 +
 3 files changed, 6 insertions(+)
 create mode 100644 packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/input.ts
 create mode 100644 packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/output.js

diff --git a/packages/babel-plugin-transform-typescript/src/index.js b/packages/babel-plugin-transform-typescript/src/index.js
index 95cb76b166ea..82839fa05831 100644
--- a/packages/babel-plugin-transform-typescript/src/index.js
+++ b/packages/babel-plugin-transform-typescript/src/index.js
@@ -419,6 +419,10 @@ export default declare(
           path.node.typeParameters = null;
         },
 
+        OptionalCallExpression(path) {
+          path.node.typeParameters = null;
+        },
+
         NewExpression(path) {
           path.node.typeParameters = null;
         },
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/input.ts b/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/input.ts
new file mode 100644
index 000000000000..362521c1ed9e
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/input.ts
@@ -0,0 +1 @@
+x?.f<T>();
\ No newline at end of file
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/output.js
new file mode 100644
index 000000000000..720f644dbc3a
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/type-arguments/optional-call/output.js
@@ -0,0 +1 @@
+x?.f();
\ No newline at end of file