Please refer to the
link given below for more information.
- Register the O-365, using screen, which is given below.
- Create developer site from SharePoint admin portal.
- Access your new site collection.
To install Napa, open your developer site and choose site contents > add an add-in > SharePoint store. In the store, search for Napa and install it. (If you have a Office 365 developer site, Napa may have already been installed when the site was created and you will see it on the site contents page.)
- Open the Napa, add-in on the Office 365 page.
- Choose the Add New Project tile and then choose the Add-in for SharePoint tile.
- Name the project Test SharePoint Add-in and then choose the Create button.
- The code editor opens and shows the default Webpage, which already contains some sample code that you can run without doing anything else.
- From here, we can access our online tool.
In the left side, multiple options are there, where we can manage ourcode. We can manage our code from app.js.