When to use jade patterns?

Imagine you have an application that calculates some server-side values, such as a list of chat rooms.

Then you have 2 reasonable solutions:

• send this data as JSON so that some side of the JavaScript client builds a list.
• create a server side list HTML

A template system is useful for this second solution.

HTML-, , nodejs HTML, .

JS (, ):

app.get('/rooms', ensureAuthenticated, ensureCompleteProfile, function(req, res){
        db.on(req.user.id)
        .then(function(uid){
                return [
                        this.listAccessibleRooms(uid),
                        this.fetchUserPingRooms(uid, 0)
                ]
        }).spread(function(accessibleRooms, pings){
                var rooms = {public:[], private:[]};
                accessibleRooms.forEach(function(r) {
                        r.path = roomPath(r);
                        rooms[r.private?'private':'public'].push(r);
                });
                res.render('rooms.jade', { rooms:rooms, pings:pings });
        }).finally(db.off);
});

Jade :

table.list
        each room, i in rooms.public
                tr
                        th: a(href=room.path) #{room.name}
                        td.rendered #{room.description}
                        if room.auth
                                td.role= room.auth

HTML:

<table class="list">
    <tr>
        <th><a href="path1">Room 1</a></th>
        <td class="rendered">Description of room 1</td>
        <td class="role">Admin</td>
    </tr>
    <tr>
        <th><a href="path2">Room 2</a></th>
        <td class="rendered">Description of room 2</td>
    </tr>
</table>

, . , HTML, , , , HTML.

Miaou . Jade rooms.jade.