I am a bit confused with Modern vs. Classic experiences.
We are migrating a SP2013 on-prem to Online and I am rebuilding the custom code with SPFx web parts or extensions; however, the client developers still want to be able to edit master pages and page layouts with SharePoint Designer using javascript.
- Can we enable master pages and page layouts customization in just some pages or is it a setting for the entire site?
- Is there a site setting where I can switch from modern to classic back and forth?
- Should I encourage the client developers to embrace SPFx?
Thanks