How to implement a simple isomorphic application?

Question

JavaScript

In theory, I understood that an isomorphic application is when instead of the REST API c, rendered pieces of html are given from the server? If not, then fix it.
So far I have found only the theory of isomorphic applications or the construction of complex architectures. But I can’t find how to glue a simple example like Hello world.
How to make a simple isomorphic application? On NodeJS + Angular for example?

Answer 1

There are no "isomorphic" applications, there are isomorphic modules and libraries.
In general, modules (libraries) in js can be conditionally divided into 4 groups:
1. ClientSide - work only on the client (browser), as they are tied to its api (dom, ajax, etc.). Examples: jQuery, Angular
Looking deeper, the ClientSide is also different, since the platforms are also different (browser, mobile browser, PhoneGap, Electron) and their API may differ.
2. ServerSide - work only on the server (node.js), again tied to the API of the platform, only the server one (working with files, databases, system, etc.). Examples: express, mongoose
3. NoSide - They work on any platform, as they are not tied to the api of a specific platform, but use only the capabilities of native js (or other similar libraries). Examples: lodash/underscore, validate.js, most templating engines
They are called isomorphic
4. BothSide - Have versions for both client and server, + well-established interaction between them (not always). Examples: Meteor.js, Derby, more recently React.js