Express-Validator: A Comprehensive Guide to Validating Requests in Node.js

Express-Validator is a powerful middleware for handling request validation in Node.js applications built with Express. It simplifies the process of ensuring that incoming data is valid, secure, and matches the expected format.

In this article, we’ll explore Express-Validator, its key features, and practical examples to help you integrate it seamlessly into your application.

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1. Why Use Express-Validator?

Validating user input is essential to:

• Prevent SQL injection, XSS, and other security vulnerabilities.
• Avoid application errors caused by invalid data.
• Ensure data integrity.

Express-Validator provides a declarative and extensible way to validate and sanitize user input.

2. Installing Express-Validator

To get started, install the library via npm:

npm install express-validator

3. Core Features of Express-Validator

• Validation: Check if input meets specific criteria (e.g., length…