Express JS App Enable Method

The app.enable() function sets the Boolean setting ‘name’ to ‘true’, where name defines one of the properties from the app settings table. Using the app.set('foo', true) for a Boolean property is same as calling the app.enable('foo') function.

Syntax

app.enable(name)

Example 1

Create a file with the name "appEnable.js" and copy the following code snippet. After creating the file, use the command "node appEnable.js" to run this code.

// app.enable() Method Demo Example

// Importing the express module
const express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;

app.enable('trust proxy')


console.log(app.get('trust proxy'));

// App listening on the below port
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Output

C:\home
ode>> node appEnable.js
true
Server listening on PORT 3000

Example 2

Let’s take a look at one more example.

// app.enable() Method Demo Example

// Importing the express module
const express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;

app.enable('foo')

console.log("Is foo enabled --", app.get('foo'));

Output

C:\home
ode>> node appEnable.js
Is foo enabled – true