From 29807837bb8b15e1610f1f798ac6ff2bc0e4fa8e Mon Sep 17 00:00:00 2001
From: Yael Hermon <yaelhe@wix.com>
Date: Sun, 11 Mar 2018 23:29:22 +0200
Subject: [PATCH] preset-env - add Symbol.asyncIterator to shippedProposals
 builtIns (#7548)

* preset-env - add Symbol.asyncIterator to shippedProposals builtins

* fix typo
---
 packages/babel-preset-env/README.md                         | 1 +
 packages/babel-preset-env/data/built-ins.json               | 6 ++++++
 packages/babel-preset-env/data/shipped-proposals.js         | 3 ++-
 packages/babel-preset-env/src/built-in-definitions.js       | 2 +-
 .../debug-fixtures/shippedProposals-chrome60/stdout.txt     | 1 +
 .../test/debug-fixtures/shippedProposals/stdout.txt         | 1 +
 .../shippedProposals-use-builtins-usage/output.js           | 2 ++
 7 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/packages/babel-preset-env/README.md b/packages/babel-preset-env/README.md
index 945752b72f..3bb7ec1991 100644
--- a/packages/babel-preset-env/README.md
+++ b/packages/babel-preset-env/README.md
@@ -412,6 +412,7 @@ The following are currently supported:
 **Builtins**
 
 - [Promise.prototype.finally](https://github.com/tc39/proposal-promise-finally)
+- [Symbol.asyncIterator](https://github.com/tc39/proposal-async-iteration)
 
 **Features**
 
diff --git a/packages/babel-preset-env/data/built-ins.json b/packages/babel-preset-env/data/built-ins.json
index 42453508ae..2ba4db1f14 100644
--- a/packages/babel-preset-env/data/built-ins.json
+++ b/packages/babel-preset-env/data/built-ins.json
@@ -1151,5 +1151,11 @@
     "firefox": "58",
     "safari": "11.1",
     "opera": "50"
+  },
+  "es7.symbol.async-iterator": {
+    "chrome": "63",
+    "firefox": "57",
+    "safari": "tp",
+    "opera": "50"
   }
 }
diff --git a/packages/babel-preset-env/data/shipped-proposals.js b/packages/babel-preset-env/data/shipped-proposals.js
index 09f7e5071a..d63e07f3cf 100644
--- a/packages/babel-preset-env/data/shipped-proposals.js
+++ b/packages/babel-preset-env/data/shipped-proposals.js
@@ -2,7 +2,8 @@
 // shipped by browsers, and are enabled by the `shippedProposals` option.
 
 const builtIns = {
-  "es7.promise.finally": "Promise.prototype.finally"
+  "es7.promise.finally": "Promise.prototype.finally",
+  "es7.symbol.async-iterator": "Asynchronous Iterators",
 };
 
 const features = {
diff --git a/packages/babel-preset-env/src/built-in-definitions.js b/packages/babel-preset-env/src/built-in-definitions.js
index 49c92f33c0..7153a5ccdc 100644
--- a/packages/babel-preset-env/src/built-in-definitions.js
+++ b/packages/babel-preset-env/src/built-in-definitions.js
@@ -16,7 +16,7 @@ export const definitions = {
     WeakMap: "es6.weak-map",
     WeakSet: "es6.weak-set",
     Promise: ["es6.object.to-string", "es6.promise"],
-    Symbol: "es6.symbol",
+    Symbol: ["es6.symbol", "es7.symbol.async-iterator"],
   },
 
   instanceMethods: {
diff --git a/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
index 245a483f2c..c6f1945e61 100644
--- a/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
@@ -19,6 +19,7 @@ Using polyfills with `entry` option:
 [src/in.js] Replaced `@babel/polyfill` with the following polyfills:
   es6.array.sort { "chrome":"60" }
   es7.promise.finally { "chrome":"60" }
+  es7.symbol.async-iterator { "chrome":"60" }
   web.timers { "chrome":"60" }
   web.immediate { "chrome":"60" }
   web.dom.iterable { "chrome":"60" }
diff --git a/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
index 2995fc33cd..a3932e2a7e 100644
--- a/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
@@ -150,6 +150,7 @@ Using polyfills with `entry` option:
   es7.string.pad-start {}
   es7.string.pad-end {}
   es7.promise.finally {}
+  es7.symbol.async-iterator {}
   web.timers {}
   web.immediate {}
   web.dom.iterable {}
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
index 7700a71842..3f72aaa902 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
@@ -8,6 +8,8 @@ require("core-js/modules/es6.array.index-of");
 
 require("regenerator-runtime/runtime");
 
+require("core-js/modules/es7.symbol.async-iterator");
+
 require("core-js/modules/es6.symbol");
 
 require("core-js/modules/es6.promise");