fix: Prototype js fix (#313)

* Add @amplitude/utils

* Add prototypeJsFix

Author: jooohhn

package.json

@@ -16,6 +16,7 @@
   "react-native": "amplitude.native.js",
   "dependencies": {
     "@amplitude/ua-parser-js": "0.7.24",
+    "@amplitude/utils": "^1.0.5",
     "blueimp-md5": "^2.10.0",
     "query-string": "5"
   },

src/amplitude-client.js

@@ -1,4 +1,5 @@
 // Core of SDK code
+import { isBrowserEnv, prototypeJsFix } from '@amplitude/utils';
 import Constants from './constants';
 import cookieStorage from './cookiestorage';
 import MetadataStorage from '../src/metadata-storage';
@@ -82,6 +83,11 @@ AmplitudeClient.prototype.init = function init(apiKey, opt_userId, opt_config, o
 
   try {
     _parseConfig(this.options, opt_config);
+    
+    if (isBrowserEnv() && window.Prototype !== undefined && Array.prototype.toJSON) {
+      prototypeJsFix();
+      utils.log.warn('Prototype.js injected Array.prototype.toJSON. Deleting Array.prototype.toJSON to prevent double-stringify');
+    }
 
     if (this.options.cookieName !== DEFAULT_OPTIONS.cookieName) {
       utils.log.warn('The cookieName option is deprecated. We will be ignoring it for newer cookies');

yarn.lock

@@ -2,11 +2,23 @@
 # yarn lockfile v1
 
 
+"@amplitude/types@^1.0.4":
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/@amplitude/types/-/types-1.0.4.tgz#21275b030c8267f9ea133a79c5c525e30c706d69"
+  integrity sha512-iWdgTXiE0T/QCK88g2ezJEhJpYHDvDs0StVVPu1ygcl6qYzk/8xrNvbeEibiIBT8t/GJ8FtH5ZIPx3c4CMjlig==
+
 "@amplitude/[email protected]":
   version "0.7.24"
   resolved "https://registry.yarnpkg.com/@amplitude/ua-parser-js/-/ua-parser-js-0.7.24.tgz#2ce605af7d2c38d4a01313fb2385df55fbbd69aa"
   integrity sha512-VbQuJymJ20WEw0HtI2np7EdC3NJGUWi8+Xdbc7uk8WfMIF308T0howpzkQ3JFMN7ejnrcSM/OyNGveeE3TP3TA==
 
+"@amplitude/utils@^1.0.5":
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/@amplitude/utils/-/utils-1.0.5.tgz#843d96b7965c69213bb1896980bed2c1569fbbed"
+  integrity sha512-leo4meeTAvp4W+UWk7EcWaJKuuJ3HqbNglRJPVAUYXaoCs2UzCnCVvjj5rUBN+Mhe0pAmkpEHHaS/1iv2prcKA==
+  dependencies:
+    "@amplitude/types" "^1.0.4"
+
 "@babel/code-frame@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0.tgz#06e2ab19bdb535385559aabb5ba59729482800f8"