From 3e23dad075e280ea4e942feea2b2674fa657b828 Mon Sep 17 00:00:00 2001
From: silverwind <me@silverwind.io>
Date: Sun, 12 Jan 2020 23:43:16 +0100
Subject: [PATCH] fix webpack polyfills (#9735) (#9738)

webpack polyfills did not work because useBuiltIns: 'entry' expects a
explicit core-js import. Changed it to 'usage' which does not require
these explicit imports and polyfills based on browserslist.

As a result, the built index.js now went from 128kB to 192kB.

Ref: https://babeljs.io/docs/en/babel-preset-env#usebuiltins
---
 webpack.config.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/webpack.config.js b/webpack.config.js
index 7efde9503e..b53934c621 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -36,7 +36,7 @@ module.exports = {
               [
                 '@babel/preset-env',
                 {
-                  useBuiltIns: 'entry',
+                  useBuiltIns: 'usage',
                   corejs: 3,
                 }
               ]