As you are migrating and testing your code, it may be a good idea to disable any plugins that fire when you are creating and updating a record. This allows you the freedom to test your JavaScript without having to worry about other system components causing issues during the testing process.
We do this because in most cases, you need to upgrade and test your plugins as well and depending on how you upgraded your system, you may have code that will not properly execute, live on the development server.
You can re-enable the plugins when they have been upgraded and the combined testing begins.
