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Express.js | app.enable() Function
  • Last Updated : 18 Jun, 2020

The app.enable() function is used to set the boolean value i.e. name to true. It is basically the shorthand for the app.set(name, true) or app.set(name, false). So instead we can use app.enable(name) function to set boolean values to some system Express.js settings.

Syntax:

app.enable(name)

Installation of express module:

  1. You can visit the link to Install express module. You can install this package by using this command.
    npm install express
  2. After installing express module, you can check your express version in command prompt using the command.
    npm version express
  3. After that, you can just create a folder and add a file for example, index.js. To run this file you need to run the following command.
    node index.js

Filename: index.js

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var express = require('express');
var app = express();
  
app.enable('trust proxy')
  
console.log(app.get('trust proxy')) // true

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Steps to run the program:

  1. The project structure will look like this:
  2. Make sure you have installed express module using the following command:
    npm install express
  3. Run index.js file using below command:
    node index.js

    Output:

    true
    
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