With a comprehensive open source management solution like the Tidelift Subscription, organizations can efficiently manage the ways development teams use thousands of open source components across JavaScript, Java, Python, Swift, and Golang. (Beta-compatible with Rust, C#, Ruby, and PHP.) Improve the health, security, and resilience of the open source used in their applications with catalogs of known-good, proactively maintained open source components—backed by maintainers.
Istanbul instruments your ES5 and ES2015+ JavaScript code with line counters, so that you can track how well your unit-tests exercise your codebase.The nyc command-line-client for Istanbul works well with most JavaScript testing frameworks: tap,mocha, AVA, etc.
You can learn more on the Istanbul JS website.