Create sharepoint online page with mixed webparts and custom development

Question

I need to build a page in sharepoint online that has two native sharepoint webparts: calendar and documents.

Also, i need to make some kind of custom development, because i was to give the user to make certain actions to the events in the calendar list (such as marking thinks done in a to-do list).

I was thinking i could develop a custom webpart and put it in a page, next to the other webparts, but i see that webparts are being deprecated in sharepoint, and being replaced with add-ins? Is this right?

So, if i have to create an add-in, can i create it and blend it in a page with native sharepoint webparts or not?

Thank you

Answer 1

If you are starting the web parts development for SharePoint online site better you can start with SharePoint Client Side web Parts (SharePoint Framework - SPFx).

This can be built with all open source JavaScript libraries. You can choose one of the preferred JavaScript libraries (jQuery, React, Angular and etc..). This new web part model addressed issues in APP development.

This Framework already in general availability and support modern sites and classic sites.

You can read below articles to get started with development.

Why SharePoint Framework

SharePoint framework Samples