How to access variables set using app.set() in express js

Question

How do i access the variables set using express's app.set() for e.g


app.set('view engine','jade');
app.set('jsDirectory',/js/');

From the guide, i understand that i can access the same using app.get(<key>), but this is the output of console.log(app.get('view engine')).

{ router:
   { app:
      { stack: [Object],
        domain: null,
        _events: [Object],
        _maxListeners: 10,
        _connections: 0,
        connections: [Getter/Setter],
        allowHalfOpen: true,
        _handle: null,
        httpAllowHalfOpen: false,
        cache: {},
        settings: [Object],
        redirects: {},
        isCallbacks: {},
        _locals: [Object],
        dynamicViewHelpers: {},
        errorHandlers: [],
        route: '/',
        routes: [Circular],
        router: [Getter],
        root: 'C:\\Users\\Shahal\\Works\\App',
        models: {},
        extensions: {},
        disconnectSchemas: [Function: disconnectSchemas],
        passport: [Object] },
     routes: {},
     params: {},
     _params: [],
     middleware: [Function] } }

It sounds like you might be running express 2.x? The documentation on expressjs.com is documentation for express 3.x. — Linus Thiel
– Linus Thiel, Commented Nov 13, 2012 at 13:36

Hector Correa · Accepted Answer · 2012-11-13 18:38:39Z

39

They become available through the app.settings object:

app.set('oneSetting', 'one');
app.set('twoSetting', 'two');
app.set('view engine','jade');

console.log(app.settings.oneSetting);
console.log(app.settings.twoSetting);
console.log(app.settings['view engine']);

answered Nov 13, 2012 at 18:38

Hector Correa

26.7k8 gold badges61 silver badges76 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Raphaël Parent · Accepted Answer · 2015-05-06 14:56:56Z

23

I know this is 2 years old, but it is still the first link that pops up on google so i thought this could be appropriate.

You could also set your variable like that

     app.set('port', 3000);

And later get it with

     app.get('port');

I prefer that approach because it's shorter and more straight forward. It is also the way they use in the Express 4.x documentation.

    app.get(name)
    Returns the value of name app setting, where name is one of strings in the app settings table.

answered May 6, 2015 at 14:56

Raphaël Parent

2533 silver badges10 bronze badges

3 Comments

KnewB Over a year ago

I might be missing something, but 'port' isn't listed in the app settings table, so how does this work?

Sithideth Bouasavanh Over a year ago

@KnewB If it is not there before, express will create the new one and assign the value.

indianwebdevil Over a year ago

but why we cant get a variable that is set in a different file ( file1.js ) and even though file1.js is executed before we execute get() function.

Nischal Jakhar · Accepted Answer · 2017-11-13 04:56:10Z

-3

app.set('view engine','hbs')
**All are correct:**
app.get('view engine')
app.locals.settings['view engine']
app.settings['view engine']

answered Nov 13, 2017 at 4:56

Nischal Jakhar

295 bronze badges

Collectives™ on Stack Overflow

How to access variables set using app.set() in express js

3 Answers 3

Comments

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related