express-validator 7.0.1

Express-validator is an express.js middleware for the validator.js module. It enhances your application by providing easy-to-use data validation functionalities.

You can easily integrate express-validator into your project using Node.js. First, you will need to install it using the npm package manager with the following command:

npm install express-validator

Remember to check your Node.js version, as express-validator requires Node.js 8 or newer to function correctly.

Below is a basic usage example of express-validator:

var express = require('express'); 
var app = express();
var bodyParser = require('body-parser');
var expressValidator = require('express-validator');

app.use(bodyParser.json());
app.use(expressValidator());

// Example route
app.post('/user', function(req, res){
    req.checkBody('username', 'Invalid username').notEmpty();
    req.checkBody('password', 'Invalid password').isLength({min: 4});
    var errors = req.validationErrors();
    if(errors){
        res.send(errors);
    }
    else{
        res.send('Validated successfully');
    }
});

app.listen(3000);

In this express app, we're using express-validator in a route to validate the 'username' and 'password'. If there are errors, we send them in the response, otherwise, we send a success message.

The full documentation for express-validator can be accessed on the official website at https://express-validator.github.io. You can find details about the installation, API, usage examples and other specifics to maximize the potential of express-validator in your project.