I am trying to extend and customize the functionality of the paragraph format plugin, and i am expecting the change to reflect throughout the whole site. But I am unable to find the location of the base file to extend. please point out the path to the base file. if you know any other alternative to do the above change, I'd like to hear that too. Thanks.
The idea approach will be to create a rtePlugin node within your website and add the properties (i.e. OOTB + any customized ) into the location. Now in your website you can refer this path for the RTE plugins so any change to the global location will be reflected across the website and the OOTB functionality will remain intact.
Please refer the below link and you can create the customized rtePlugin node.