From c8bb4500326700e7dc68ce8c4b90b6482c48d82f Mon Sep 17 00:00:00 2001
From: Henry Zhu <hi@henryzoo.com>
Date: Thu, 9 Aug 2018 11:43:45 -0400
Subject: [PATCH] remove proposals polyfills from default import [skip ci]
 (#8440)

The default import is replaced with only polyfills that are Stage 4; this is in alignment with how we have removed the Stage presets. This also would mean we would need to add new imports when necessary, but that can be in a future release.
---
 packages/babel-polyfill/src/index.js      | 17 ++++++++++++++++-
 packages/babel-polyfill/src/noConflict.js | 17 ++++++++++++++++-
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/packages/babel-polyfill/src/index.js b/packages/babel-polyfill/src/index.js
index 5661b7c75a..d2bea4df33 100644
--- a/packages/babel-polyfill/src/index.js
+++ b/packages/babel-polyfill/src/index.js
@@ -1,4 +1,19 @@
-import "core-js/shim";
+// Cover all standardized ES6 APIs.
+import "core-js/es6";
+
+// Standard now
+import "core-js/fn/array/includes";
+import "core-js/fn/string/pad-start";
+import "core-js/fn/string/pad-end";
+import "core-js/fn/symbol/async-iterator";
+import "core-js/fn/object/get-own-property-descriptors";
+import "core-js/fn/object/values";
+import "core-js/fn/object/entries";
+import "core-js/fn/promise/finally";
+
+// Ensure that we polyfill ES6 compat for anything web-related, if it exists.
+import "core-js/web";
+
 import "regenerator-runtime/runtime";
 
 if (global._babelPolyfill && typeof console !== "undefined" && console.warn) {
diff --git a/packages/babel-polyfill/src/noConflict.js b/packages/babel-polyfill/src/noConflict.js
index ae74735ec3..ec7c002fff 100644
--- a/packages/babel-polyfill/src/noConflict.js
+++ b/packages/babel-polyfill/src/noConflict.js
@@ -1,2 +1,17 @@
-import "core-js/shim";
+// Cover all standardized ES6 APIs.
+import "core-js/es6";
+
+// Standard now
+import "core-js/fn/array/includes";
+import "core-js/fn/string/pad-start";
+import "core-js/fn/string/pad-end";
+import "core-js/fn/symbol/async-iterator";
+import "core-js/fn/object/get-own-property-descriptors";
+import "core-js/fn/object/values";
+import "core-js/fn/object/entries";
+import "core-js/fn/promise/finally";
+
+// Ensure that we polyfill ES6 compat for anything web-related, if it exists.
+import "core-js/web";
+
 import "regenerator-runtime/runtime";