Modern JavaScript Runtimes: Deno and Bun
Free Intermediate course · 10 lessons · 3 weeks · Certificate on completion
Understand Node, Deno and Bun, and when a newer runtime makes your tooling faster or safer. Across 10 lessons you'll move from fundamentals to a portfolio-ready outcome — at your own pace, with quizzes after each lesson and a final exam to certify your mastery.
What you'll learn
- What a JavaScript runtime does
- Node.js internals recap
- Deno's secure-by-default model
- Deno tooling: fmt, lint, test
- Bun as runtime and package manager
- Bun's bundler and test runner
Skills you'll pick up
- What a JavaScript runtime does
- Node.js internals recap
- Deno's secure-by-default model
- Deno tooling: fmt, lint, test
- Bun as runtime and package man
- Bun's bundler and test runner
Tools covered
- JavaScript Runtimes
- Real-world projects
- Quizzes
- Final exam
Course modules
Module 1: What a JavaScript runtime does
Module 1 of Modern JavaScript Runtimes: Deno and Bun. 3 lessons · 3h
Module 2: Deno tooling: fmt, lint, test
Module 2 of Modern JavaScript Runtimes: Deno and Bun. 3 lessons · 3h
Module 3: Web-standard APIs on the server
Module 3 of Modern JavaScript Runtimes: Deno and Bun. 2 lessons · 2h
Module 4: Benchmarking runtimes fairly
Module 4 of Modern JavaScript Runtimes: Deno and Bun. 2 lessons · 2h
Lessons in this course
- What a JavaScript runtime does
- Node.js internals recap
- Deno's secure-by-default model
- Deno tooling: fmt, lint, test
- Bun as runtime and package manager
- Bun's bundler and test runner
- Web-standard APIs on the server
- Compatibility with npm packages
- Benchmarking runtimes fairly
- Choosing a runtime for a project
Instructor
Lena Fischer — Senior Frontend Engineer
Lena Fischer is a Senior Frontend Engineer with years of hands-on experience teaching JavaScript Runtimes to thousands of learners worldwide.
Certificate
Finish every lesson and pass the final exam to earn a free, verifiable Learnera certificate for Modern JavaScript Runtimes: Deno and Bun. It can be downloaded as a PDF and shared on LinkedIn.
Career outcomes
Median global salary $120,000 per year · median India salary ₹16,80,000 per year · 61,640 open roles worldwide
- JavaScript Runtimes Specialist
- Senior JavaScript Runtimes Lead
- JavaScript Runtimes Consultant
Frequently asked questions
Is the Modern JavaScript Runtimes: Deno and Bun course free?
Yes. Every Learnera course, including Modern JavaScript Runtimes: Deno and Bun, is completely free — lessons, quizzes, the final exam, and the certificate.
How long does Modern JavaScript Runtimes: Deno and Bun take?
10 lessons, typically completed in 3 weeks at a comfortable pace.
Do I get a certificate?
Yes — pass the final exam and you receive a free, verifiable certificate you can share on LinkedIn.