From 1f90d0c7fae6c3c1967f3033bca5f2e53cb5b9bd Mon Sep 17 00:00:00 2001
From: Denis Pushkarev <zloirock@zloirock.ru>
Date: Sat, 9 Nov 2019 19:00:26 +0700
Subject: [PATCH] move iOS check to a separate file

---
 packages/core-js/internals/is-ios.js    | 3 +++
 packages/core-js/internals/microtask.js | 4 ++--
 packages/core-js/internals/task.js      | 4 ++--
 3 files changed, 7 insertions(+), 4 deletions(-)
 create mode 100644 packages/core-js/internals/is-ios.js

diff --git a/packages/core-js/internals/is-ios.js b/packages/core-js/internals/is-ios.js
new file mode 100644
index 000000000000..d14fc2966399
--- /dev/null
+++ b/packages/core-js/internals/is-ios.js
@@ -0,0 +1,3 @@
+var userAgent = require('../internals/user-agent');
+
+module.exports = /(iphone|ipod|ipad).*applewebkit/i.test(userAgent);
diff --git a/packages/core-js/internals/microtask.js b/packages/core-js/internals/microtask.js
index 1a3cd74fb33a..479ff84197cf 100644
--- a/packages/core-js/internals/microtask.js
+++ b/packages/core-js/internals/microtask.js
@@ -2,7 +2,7 @@ var global = require('../internals/global');
 var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
 var classof = require('../internals/classof-raw');
 var macrotask = require('../internals/task').set;
-var userAgent = require('../internals/user-agent');
+var IS_IOS = require('../internals/is-ios');
 
 var MutationObserver = global.MutationObserver || global.WebKitMutationObserver;
 var process = global.process;
@@ -39,7 +39,7 @@ if (!queueMicrotask) {
       process.nextTick(flush);
     };
   // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
-  } else if (MutationObserver && !/(iphone|ipod|ipad).*applewebkit/i.test(userAgent)) {
+  } else if (MutationObserver && !IS_IOS) {
     toggle = true;
     node = document.createTextNode('');
     new MutationObserver(flush).observe(node, { characterData: true });
diff --git a/packages/core-js/internals/task.js b/packages/core-js/internals/task.js
index bddba5be12e5..d1aa586f30b6 100644
--- a/packages/core-js/internals/task.js
+++ b/packages/core-js/internals/task.js
@@ -4,7 +4,7 @@ var classof = require('../internals/classof-raw');
 var bind = require('../internals/bind-context');
 var html = require('../internals/html');
 var createElement = require('../internals/document-create-element');
-var userAgent = require('../internals/user-agent');
+var IS_IOS = require('../internals/is-ios');
 
 var location = global.location;
 var set = global.setImmediate;
@@ -69,7 +69,7 @@ if (!set || !clear) {
     };
   // Browsers with MessageChannel, includes WebWorkers
   // except iOS - https://github.com/zloirock/core-js/issues/624
-  } else if (MessageChannel && !/(iphone|ipod|ipad).*applewebkit/i.test(userAgent)) {
+  } else if (MessageChannel && !IS_IOS) {
     channel = new MessageChannel();
     port = channel.port2;
     channel.port1.onmessage = listener;