- CHS-JS1 is shorthand for CodeHS JavaScript Level 1, the issuer's JavaScript Level 1 Certification.
- The exam has 45 multiple-choice questions, a 90-minute limit, and a 60% passing score.
- Six topic groups define scope: Data Types and Operators, Conditionals, Loops, Program Structure, Error Handling, and Objects.
- No prerequisites exist; the Corgi intro JavaScript course is recommended preparation, not required.
What Does CHS-JS1 Stand For? A Quick Orientation
- Breaking Down the Acronym
- Who Issues the Credential
- What the Exam Actually Covers
- Exam Format and Question Style
- Vouchers, Attempts, and Access
- Proctoring and Exam-Day Rules
- Scores, Results, and the Certificate
- Who Benefits From It
- Scheduling Your Prep Around the Six Domains
- Where to Go Next
- Frequently Asked Questions
Key Takeaways
- CHS-JS1 is shorthand for CodeHS JavaScript Level 1, the issuer's JavaScript Level 1 Certification.
- The exam has 45 multiple-choice questions, a 90-minute limit, and a 60% passing score.
- Six topic groups define scope: Data Types and Operators, Conditionals, Loops, Program Structure, Error Handling, and Objects.
- No prerequisites exist; the Corgi intro JavaScript course is recommended preparation, not required.
- Earned certificates expire after 10 years, and each voucher covers exactly one attempt.
Breaking Down the Acronym
On this site, CHS-JS1 is a compact label for CodeHS JavaScript Level 1. Read it in three parts:
- CHS points to CodeHS, the computer science education platform that publishes and administers the exam.
- JS stands for JavaScript, the programming language the exam tests.
- 1 marks the entry tier: Level 1 of the JavaScript certification, aimed at foundational skills rather than advanced application development.
The credential's formal title from the issuer is JavaScript Level 1 Certification. "CHS-JS1" is simply a convenient shorthand for it, so treat it as the nickname for that specific CodeHS exam and nothing broader. If you want the plain-language definition in other phrasings, our pages on what CHS-JS1 is and the CHS-JS1 meaning cover the same ground from slightly different angles.
Who Issues the Credential
CodeHS is both the governing body and the testing platform. That matters in practice because the exam is delivered through the CodeHS Certifications app, and monitoring runs through the Proctor Dashboard. There is no separate third-party testing center network to learn about, no outside registration portal, and no independent standards body layered on top.
For students, this means the experience is closely tied to the same environment many already use in class. For teachers and districts, it means vouchers are purchased through CodeHS directly. For a deeper look at how someone becomes eligible, see our guide to CHS-JS1 requirements.
What the Exam Actually Covers
The issuer's exam overview lists six top-level topic groups. These are official exam-topic groupings, not a percentage-weighted blueprint, so do not assume any one group is worth a fixed share of your score. Here they are, with what each one means for a candidate.
Domain 1: Data Types and Operators
The foundation of everything else. Expect to reason about how values behave when combined or compared.
- Distinguishing numbers, strings, and booleans
- Evaluating arithmetic, comparison, and logical operators
- Predicting the result of an expression by hand
Domain 2: Conditionals
Decision-making in code. Questions often ask which branch runs for a given input.
- if, else if, and else chains
- Combining conditions with logical operators
- Tracing which path executes for specific values
Domain 3: Loops
Repetition and iteration. Tracing is the key skill, since you will often need to determine how many times a loop runs or what it produces.
- for and while loop mechanics
- Loop counters, start values, and stopping conditions
- Spotting off-by-one behavior
Domain 4: Program Structure
How code is organized into reusable, readable pieces.
- Functions, parameters, and return values
- Understanding the flow of a program from top to bottom
- Reading short programs and explaining what they do
Domain 5: Error Handling
Recognizing and responding to things going wrong.
- Identifying kinds of errors in code
- Understanding how a program can respond to a failure
- Reading a snippet and spotting why it would misbehave
Domain 6: Objects
Grouping related data and working with it.
- Properties and how to access them
- Reading and interpreting object definitions in code
- Reasoning about what an object lookup returns
For the full breakdown of each area, read our complete guide to all six CHS-JS1 content areas. Note that the six headings above are the complete set of official top-level topic groups; preparation courses and practice listings are study aids, not additional exam domains.
Exam Format and Question Style
| Feature | Detail |
|---|---|
| Question type | Multiple choice |
| Number of questions | 45 |
| Time limit | 90 minutes |
| Passing score | 60% |
| Delivery | Online, at home or at school |
| Sitting | Must be completed in one sitting |
| Question selection | Randomly selected |
| Reference material | JavaScript examination reference sheet provided |
Because every question is multiple choice, the exam rewards careful code reading over code writing. You are not building programs from scratch; you are predicting output, identifying correct statements, and choosing the right fix. The 90-minute window across 45 questions gives a generous pace, so the real risk is rushing past a subtle detail rather than running out of time.
If you are wondering how the difficulty feels in practice, our article on how hard the CHS-JS1 exam is digs into that, and the passing score breakdown explains what 60% means for a 45-question test.
Vouchers, Attempts, and Access
The registration mechanics are voucher-based, which is unusual compared with many credentials that charge a simple public fee.
- Pricing: CodeHS provides school and district voucher pricing by direct quote. No public numeric fee was verified, so there is no sticker price to cite here.
- One attempt per voucher: Each purchased voucher permits a single attempt.
- Retakes: There is no numerical limit on retakes, but every additional attempt requires another purchased voucher.
- Expiration: Unused school or district vouchers expire at the end of the contract term and do not roll over between school years.
- Prerequisites: None. Introduction to Computer Science in JavaScript (Corgi) is recommended preparation, but it is not an eligibility requirement.
The voucher expiration rule has a practical consequence: if you are in a school or district program, plan your attempt within the contract term rather than assuming you can use leftover vouchers next year. For more on money matters, see the CHS-JS1 certification cost breakdown, and for timing, check exam dates and scheduling.
Proctoring and Exam-Day Rules
Testing can happen at home or at school, with a teacher or authorized proctor monitoring through the CodeHS Certifications app and Proctor Dashboard. A few rules shape how you should prepare your setup:
- The exam uses an Honor Code, randomly selected questions, and Focus Mode.
- Focus Mode blocks navigation to other CodeHS pages. It is not described as a system-wide browser lockdown, so do not assume it controls everything on your device.
- External websites, collaboration, copying or sharing exam questions, and running code in another website or program are all prohibited.
- CodeHS suggests having paper, a pencil, and a calculator on hand.
- Extended-time and read-aloud accommodations are supported; other requests require platform review.
Key Takeaway
Because running code elsewhere is prohibited, practice tracing code on paper before exam day. The reference sheet and a pencil are your main tools, and being fluent at predicting output by hand is the most exam-relevant habit you can build.
Scores, Results, and the Certificate
Results are released within 36 hours on school days. You receive an overall score along with a topic-level performance report, which is especially useful if you need to retake: it shows which of the six domains dragged your score down. Successful candidates get a downloadable certificate, and earned certificates expire after 10 years.
That topic-level report is worth treating as a diagnostic. If Loops came back weak, you know exactly where to focus before a second voucher is used. Our CHS-JS1 study guide shows how to turn that kind of feedback into a plan.
Who Benefits From It
The credential is built around foundational JavaScript, so its natural audience is learners at the beginning of their programming journey. That typically includes high school students in computer science courses, students working through the Corgi intro course, and educators or districts looking for a structured way to validate JavaScript fundamentals.
It is worth being realistic about hiring claims. A Level 1 credential demonstrates a verified grasp of basics; it is best seen as an early proof point that can support a portfolio, a college application, or a stepping stone toward deeper study rather than a job-qualifying credential on its own. We do not cite salary figures here because none were verified; for a measured discussion, read the CHS-JS1 salary guide, the overview of CHS-JS1 jobs, and the analysis of whether the certification is worth it.
Scheduling Your Prep Around the Six Domains
Here is the one structured plan in this article, built around how the six domains depend on each other. Data Types and Operators comes first because every other domain assumes you can evaluate expressions correctly. Conditionals and Loops come next because they both rely on boolean logic, and Program Structure builds on all of them. Error Handling and Objects round things out.
Data Types and Operators
- Hand-evaluate expressions mixing numbers, strings, and booleans
- Practice with the reference sheet open so you learn where things live
Conditionals and Loops
- Trace branches for several input values
- Count loop iterations on paper and check for off-by-one errors
Program Structure, Error Handling, Objects
- Read short programs and state what each function returns
- Identify why a snippet fails, and practice reading object properties
Mixed Review
- Take timed sets of 45 questions in 90 minutes to match the real format
- Revisit whichever domain you missed most
For a compact refresher you can use in the final days, our one-page CHS-JS1 cheat sheet pairs well with timed sets on the main practice test site.
Where to Go Next
If you landed here just to learn what the acronym means, you now have it: CodeHS JavaScript Level 1, an entry-level JavaScript certification with six topic groups, a 45-question multiple-choice exam, and a 60% passing score. To go further, these pages answer neighboring questions:
- What CHS-JS1 certification is and how it is positioned
- The CHS-JS1 certification overview
- CHS-JS1 training options and resources
When you are ready to test yourself against realistic questions, head to the CHS-JS1 practice tests.
Frequently Asked Questions
On this site it stands for CodeHS JavaScript Level 1: CHS for CodeHS, JS for JavaScript, and 1 for the entry-level tier. The formal credential title is JavaScript Level 1 Certification.
The exam has 45 multiple-choice questions with a 90-minute time limit, and it must be completed in a single sitting. The passing score is 60%.
No. There are no certification prerequisites. Introduction to Computer Science in JavaScript (Corgi) is recommended preparation, but it is not required for eligibility.
There is no numerical limit on retakes, but each purchased voucher allows only one attempt. Every additional attempt requires another voucher, and unused school or district vouchers expire at the end of the contract term.
Earned certificates expire after 10 years. Successful candidates can download the certificate, and results arrive within 36 hours on school days along with a topic-level performance report.