- The Short Answer: What a CHS-JS1 Actually Is
- Who Issues It and Where It Lives
- Exam Format at a Glance
- The Six Official Topic Groups
- How Testing, Proctoring, and Focus Mode Work
- Vouchers, Retakes, and Fees
- Results, Certificate, and Expiration
- Who Should Take It (and Who Hires for It)
- Preparing Without Guesswork
- Common Mix-Ups to Avoid
- Frequently Asked Questions
- CHS-JS1 is the CodeHS JavaScript Level 1 Certification: 45 multiple-choice questions in 90 minutes, 60% to pass.
- The exam covers six topic groups, from Data Types and Operators through Objects.
- Each purchased voucher allows one attempt; every retake requires another voucher.
- No prerequisites exist; the Corgi intro JavaScript course is recommended preparation only.
The Short Answer: What a CHS-JS1 Actually Is
In this context, CHS-JS1 is shorthand for the CodeHS JavaScript Level 1 Certification, a timed, online, multiple-choice exam that checks whether a student can read and reason about foundational JavaScript. It is a credential issued through the CodeHS platform, the same environment many schools use to teach programming. Passing it gives you a downloadable certificate showing you met the issuer's standard for introductory JavaScript.
The label is easy to misread because the same letters can appear in unrelated contexts. This site is about one thing only: the CodeHS exam. If you want other angles on the name itself, our companion pages cover what CHS-JS1 stands for, the meaning of CHS-JS1, and the broader CHS-JS1 certification overview.
Who Issues It and Where It Lives
CodeHS is both the governing body and the testing platform. The credential title on the issuer side is "JavaScript Level 1 Certification." Exams are delivered through the CodeHS Certifications app, and teachers or authorized proctors monitor sessions using the Proctor Dashboard. Because everything runs inside CodeHS, there is no separate third-party testing center network to learn about.
That platform tie-in shapes the experience. Students who have used CodeHS for coursework will recognize the interface conventions, which removes some of the friction that comes with an unfamiliar testing vendor. If you want the formal rules of eligibility, see our breakdown of CHS-JS1 requirements.
Exam Format at a Glance
| Feature | CHS-JS1 Detail |
|---|---|
| Credential name | JavaScript Level 1 Certification (CodeHS) |
| Question count | 45 multiple-choice questions |
| Time limit | 90 minutes, completed in one sitting |
| Passing score | 60% |
| Prerequisites | None required |
| Reference material | JavaScript examination reference sheet provided |
| Question selection | Randomly selected questions |
| Delivery | Online, at home or at school, with proctor monitoring |
| Certificate validity | 10 years |
Two details deserve emphasis. First, the exam must be finished in a single sitting, so you cannot pause and return tomorrow. Second, the 60% passing score is a cut score for your individual result. It is not a cohort pass rate, and no official pass rate has been verified. If you are curious about what is and is not known, read our discussion of the CHS-JS1 pass rate and the details on the CHS-JS1 passing score.
What the question style feels like
Because every item is multiple choice, the exam rewards precise code reading rather than writing programs from scratch. Expect to trace what a snippet outputs, spot why a condition behaves unexpectedly, identify the correct operator or construct for a task, or recognize what an object property access returns. The provided reference sheet helps with syntax recall, but it will not do the reasoning for you. Candidates who can mentally execute short programs line by line have a clear advantage.
The Six Official Topic Groups
CodeHS publishes six top-level topic headings for the exam. These are official exam-topic groups, not course-module counts and not a percentage-weighted blueprint, so do not assume equal or unequal weighting. Here is what each group means for a candidate.
Domain 1: Data Types and Operators
The foundation for everything else on the exam.
- Distinguish numbers, strings, and booleans, and predict results when they mix
- Apply arithmetic, comparison, and logical operators correctly
- Understand how variables store and update values
Domain 2: Conditionals
Decision-making in code.
- Trace if, else if, and else chains to find which branch runs
- Evaluate compound boolean expressions with and/or/not logic
- Notice edge cases at comparison boundaries
Domain 3: Loops
Repetition and iteration.
- Follow for and while loops to determine final values and iteration counts
- Spot off-by-one mistakes and loops that never terminate
- Understand how loop variables change on each pass
Domain 4: Program Structure
How code is organized.
- Read and reason about functions, parameters, and return values
- Understand scope and how values flow between parts of a program
- Recognize well-structured versus confusing code organization
Domain 5: Error Handling
What happens when things go wrong.
- Identify likely causes of errors in short snippets
- Understand how a program responds to failure and how to guard against it
- Distinguish syntax problems from logic problems
Domain 6: Objects
Grouping related data.
- Read object literals and access properties
- Predict results after properties are added or modified
- Connect objects with the functions and loops from earlier domains
For a deeper walk through each area, see the full CHS-JS1 exam domains guide.
How Testing, Proctoring, and Focus Mode Work
The exam can be taken at home or at school, monitored by a teacher or authorized proctor through the CodeHS Certifications app and Proctor Dashboard. Several integrity measures apply:
- Honor Code: candidates agree to it before testing.
- Randomly selected questions: your set may differ from a classmate's.
- Focus Mode: blocks navigation to other CodeHS pages during the exam. It is not described as a system-wide browser lockdown, so do not rely on it to police everything on your device.
- Prohibited conduct: using external websites, collaborating, copying or sharing exam questions, and running code in another website or program are all off limits.
CodeHS suggests having paper, a pencil, and a calculator nearby, which fits the exam's trace-the-code nature. Writing out variable values as you step through a loop is often faster and safer than doing it in your head.
Accommodations are supported. Extended time and read-aloud are available, while other requests go through platform review. If you may need support, arrange it with your teacher well before test day.
Vouchers, Retakes, and Fees
This is where many first-time candidates get confused, so the mechanics are worth spelling out. CodeHS provides school and district voucher pricing by direct quote. No public numeric fee was verified, so you will not find a reliable price tag to quote here. Ask your school or district contact, and see our certification cost breakdown for how to think through the budget.
- Each purchased voucher permits one attempt.
- There is no numerical cap on retakes, but every additional attempt needs another purchased voucher.
- Unused school or district vouchers expire at the end of the contract term and do not roll over between school years.
Key Takeaway
Because vouchers expire with the contract term and do not carry over, timing matters. If your class buys vouchers, plan the exam window so that students are prepared before the term ends rather than scrambling at the last minute.
Scheduling specifics vary by school, so check our notes on CHS-JS1 exam dates for how to think about testing windows.
Results, Certificate, and Expiration
Results are released within 36 hours on school days. You receive an overall score along with a topic-level performance report, which is valuable if you need to retake because it shows which of the six groups dragged your result down. Successful candidates receive a downloadable certificate, and earned certificates expire after 10 years.
Use the topic-level report strategically. If a retake is needed, it points you toward the specific groups to rework instead of restudying everything equally.
Who Should Take It (and Who Hires for It)
The primary audience is students learning JavaScript through CodeHS, typically in a school or district program. There are no certification prerequisites, so eligibility is not the barrier; readiness is. Introduction to Computer Science in JavaScript (Corgi) is the recommended preparation, but it is a recommendation, not a requirement.
On the career side, be realistic. This is an entry-level credential demonstrating foundational skill, not a professional license. It works best as a verifiable signal on a student portfolio, college application, or early résumé, alongside actual projects. No employer-specific hiring data has been verified for this exam, and we do not publish salary figures for it. For an honest take on value, read whether the certification is worth it, and for context on career angles see CHS-JS1 jobs and the salary guide, which explains what can and cannot be claimed.
Preparing Without Guesswork
Official preparation options include the Corgi course and a Level 1 Certification Practice course listed in the CodeHS certification practice catalog. These are preparation resources, not additional exam domains, and they do not establish exhaustive coverage or official weights. Treat them as practice, not as the definition of the exam.
One practical way to sequence your study is by domain dependency:
Data Types and Operators + Conditionals
- Drill operator results and boolean logic until tracing is automatic
- Trace if/else chains on paper
Loops + Program Structure
- Step through loops tracking variable values by hand
- Practice reading functions, parameters, and return values
Error Handling + Objects, then full review
- Study how errors arise and how programs respond
- Combine objects with loops and functions, then take a timed mixed set
The ordering reflects how the topics build on each other: operators feed conditionals, conditionals feed loops, and objects tie everything together. For a more detailed plan, see the CHS-JS1 study guide, keep the cheat sheet handy for quick review, and gauge your standing with a timed practice test. If you are wondering how demanding it will be, our difficulty guide sets expectations.
Common Mix-Ups to Avoid
- Confusing it with a course final. The certification exam is a separate assessment with its own format.
- Treating 60% as a pass rate. It is the score you need, not a statistic about other test takers.
- Assuming Focus Mode locks your whole computer. It blocks navigation to other CodeHS pages only.
- Expecting free retakes. Each attempt consumes a voucher.
- Importing facts from lookalike credentials. Other credentials may share similar letters; details such as fees or dates for those do not apply here.
For more naming and definition pages, you can also browse what the CHS-JS1 certification is and the training overview.
Frequently Asked Questions
It is the CodeHS JavaScript Level 1 Certification: a 45-question, 90-minute online multiple-choice exam with a 60% passing score that tests foundational JavaScript skills.
No. There are no certification prerequisites. Introduction to Computer Science in JavaScript (Corgi) is recommended preparation, but it is not an eligibility requirement.
Yes. There is no numerical limit on retakes, but each attempt requires another purchased voucher, since one voucher permits one attempt.
Results are released within 36 hours on school days, including an overall score and a topic-level performance report. Successful candidates can download a certificate.
Earned certificates expire after 10 years.
Understanding exactly what the credential is, how it is delivered, and what it covers is the first step toward passing it. With six clear topic groups, a fixed format, and straightforward voucher rules, the CHS-JS1 rewards candidates who can read code carefully and practice consistently across every domain.