!json and !code or require()

[Johnny Weng Luu]

In CouchDB definitive guide the author says you could use:

// !json templates.edit
// !json blog
// !code vendor/couchapp/path.js
// !code vendor/couchapp/template.js

But why use those macros when you can use require()?

Are there occasions I want to use the macros instead?

/Johnny