Content Security Policy Implementation Assistance

I require a reliable and experienced developer to assist me in implementing a Content Security Policy (CSP) in my JavaScript application.

Key Details:
- Purpose: The primary goal of this CSP implementation is to prevent Cross-Site Scripting Attacks within the application.
- Target Sources: The CSP should be configured to allow only self-hosted scripts and elements. These are specified in the web.config file.
- Application Language: The application is developed in JavaScript.

Your Responsibilities:
- Review the current application setup and assess the specific requirements for the CSP.
- Implement the CSP accordingly, ensuring that only self-hosted scripts and elements are permitted.
- Integrate the CSP seamlessly with the existing application architecture, ensuring no disruptions in functionality.

Ideal Skills and Experience:
- Proficiency in JavaScript and web application security.
- Prior experience with Content Security Policy implementations.
- Understanding of web.config and its usage in specifying content sources.
- Knowledge of common Cross-Site Scripting (XSS) attack vectors and mitigation strategies.