Understanding how to secure your JavaScript code can change that and help us to protect our applications and users.

1. Keep Your Dependencies Up-to-Date

Failing to update libraries may leave your applications open to known security risks. Regular updates ensure you benefit from the latest fixes and enhancements.

  • Use a Package Manager: npm, yarn or pnpm.
  • Regular Checks: Run npm outdated, yarn outdated or pnpm outdated to see which packages are outdated.
  • Update Regularly packages to the latest versions

A good solution to keep packages up to date is to use Renovate. With Renovate, you can customize the bot’s behavior through configuration files, and it even supports monorepo architectures without extra setup. The package is open-source and can be self-hosted, making it a flexible choice for individual developers and teams alike. Whether you’re working on GitHub, GitLab, Bitbucket, or Azure DevOps, Renovate adapts to your workflow and can autodetect settings to streamline the update process.

Use Simple Security Headers

Security headers tell the browser how to behave when handling your site’s content, which helps prevent some types of attacks like cross-site scripting and data injection.

We can use Content Security Policy (CSP), a security header that helps stop unauthorized scripts from running on your site, which can prevent many attacks.

https://securityheaders.com/ – is great tool where you can check your website headers.

3. Sanitize User Input

Handling user input with caution is essential, as improper management can lead to security vulnerabilities. There’s a risk that ill-intentioned individuals may submit information intended to compromise the safety of other users or the website itself.

It’s crucial to approach all user-provided data with skepticism, sanitizing incoming information to ensure its security prior to integration into your application.

Now, We’re Safer!

Even minor actions can substantially elevate the safety of your web applications.