After migrating the original ePortal MDA project to Visual Studio 2017, if you want to manage the project using Visual Studio Code instead, you can use the following steps to move the project to Visual Studio Code:
Install Visual Studio Code (latest version).
Install the Cordova Tools Extension into Visual Studio Code.
Open the Visual Studio project folder in Visual Studio Code. Continue further development of the project using the Visual Studio Code environment.
This is the recommended approach if you are currently using Visual Studio 2017, but want to use Visual Studio Code instead for your Hybrid App Development. If you do not have Visual Studio 2017, then refer to Migrating ePortal MDA Project Directly to a Visual Studio Code Cordova Project.