From 7170aa04d88776572742519fee5716d7531144fc Mon Sep 17 00:00:00 2001
From: Ben Scott <ben.scott@shopify.com>
Date: Fri, 23 Apr 2021 16:31:25 -0700
Subject: [PATCH] Update lib for base/dom configs to target es2020

The functionality in esnext.asynciterable was standardised and is
included in es2018
---
 packages/typescript-configs/CHANGELOG.md | 7 ++++++-
 packages/typescript-configs/base.json    | 2 +-
 packages/typescript-configs/dom.json     | 5 ++---
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/packages/typescript-configs/CHANGELOG.md b/packages/typescript-configs/CHANGELOG.md
index 51a798b9..f9a42980 100644
--- a/packages/typescript-configs/CHANGELOG.md
+++ b/packages/typescript-configs/CHANGELOG.md
@@ -5,7 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-<!-- ## Unreleased -->
+## Unreleased
+
+### Breaking Change
+
+Increased the base lib target to es2020 in both `base.json` and `dom.json`. This allows for a greater range of standard features to be define. We expect typescript will be ran through Babel to transpile all features required for your target environment [[#239](https://github.com/Shopify/web-configs/pull/239)]
+
 
 ## 4.0.0 - 2021-02-24
 
diff --git a/packages/typescript-configs/base.json b/packages/typescript-configs/base.json
index 4a121989..34cdc333 100755
--- a/packages/typescript-configs/base.json
+++ b/packages/typescript-configs/base.json
@@ -4,7 +4,7 @@
     "esModuleInterop": true,
     "isolatedModules": true,
     "experimentalDecorators": true,
-    "lib": ["dom", "es2018", "esnext.asynciterable"],
+    "lib": ["dom", "es2020"],
     "moduleResolution": "node",
     "noUnusedLocals": true,
     "noUnusedParameters": true,
diff --git a/packages/typescript-configs/dom.json b/packages/typescript-configs/dom.json
index c17a0c86..eb57f957 100644
--- a/packages/typescript-configs/dom.json
+++ b/packages/typescript-configs/dom.json
@@ -5,9 +5,8 @@
     "lib": [
       "dom",
       "dom.iterable",
-      "es2017",
-      "esnext.asynciterable",
-      "scripthost"
+      "scripthost",
+      "es2020"
     ],
     "module": "esnext",
     "target": "es2017"