In this tutorial, we will use express-validator to validate and sanitize the user input on our login form. In the previous tutorial, we created a login form using ExpressJS. The express-validator library is also widely used and accepted by the community. Although you can write your own code, it would take a lot of time, and you would need a lot of practice to ensure you didn’t miss anything. It is a flexible and straightforward way to manage necessary form validation and sanitization. It is based on validator.js and allows you to: What is express-validator?Įxpress-validator is a library used to validate and sanitize ExpressJS forms. Use the express-validator library to validate and sanitize a login form. Return validation errors to the user to improve the UXīy the end of this tutorial, you will know how to use express-validator to perform back-end validation and data sanitation. Install the express-validator library for use with an ExpressJS server.Either way, validation and sanitization protect your Node.js application against inappropriate input. The erroneous data may be due to a user making an unintentional mistake or a malicious hacker implementing an attack. The form data may be invalid or even hazardous. When a web application accepts user input, you never know what data to expect.
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