How to Prevent SQL Injection Attacks in Node.js

This post details how to prevent SQL injection attacks in Node.js applications using the `mysql2` npm package. It explains the nature of SQL injection attacks with examples, demonstrates how to configure the `mysql2` client, and provides three primary methods for prevention: disabling multiple statements, using placeholders (parameterized queries), and input validation (including allowlisting). The post emphasizes that placeholders are the most crucial defense.