Which statement is true about CodeScan?

CodeScan is a static code analysis tool designed to help developers ensure code quality by identifying security vulnerabilities, code smells, and best practice violations across various programming languages in Salesforce environments. The statement that CodeScan also checks JavaScript code is correct because it encompasses not just Apex classes but also front-end technologies like JavaScript and HTML, which are integral to modern Salesforce development.

By supporting JavaScript analysis, CodeScan helps ensure that client-side scripts comply with security standards and best coding practices, which is essential for maintaining high-quality, secure applications. This comprehensive approach means that developers can identify potential issues in JavaScript alongside their server-side code, leading to overall better quality management.

The other options imply limitations that do not fully capture the capabilities of CodeScan. Thus, recognizing CodeScan as a tool that incorporates JavaScript analysis is key to understanding its role in full-spectrum code quality evaluation in Salesforce development environments.