Custom Save Button On Custom SharePoint List Forms

This blog describes how we can use Sharepoint OOTB save functionality to save data on a custom list form using custom Save button. This means we would not use Sharepoint OOTB buttons to save data to the list but our own button with custom css to save data to the SharePoint list.

source https://www.c-sharpcorner.com/Blogs/custom-save-button-on-custom-sharepoint-list-forms