PDF for the printer, a Windows engine for the desk, an online engine for everything else. In 2026, TorrentVCE's Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) material for the JavaScript-Developer-I日本語 exam adapts to your preferences, not the reverse.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Array methods and data manipulation - JSON parsing and usage - Truthy and falsy values - Working with strings, numbers, dates, and booleans - Type coercion and conversion rules - Variable declaration and initialization |
| Topic 2: Testing | 7% | - Unit testing concepts - Code coverage and best practices - Testing frameworks and assertions - Test doubles and mocks |
| Topic 3: Objects, Functions, and Classes | 25% | - Class syntax, inheritance, and prototypes - Function definitions, parameters, and scope - Object creation, properties, and methods - Decorators and advanced function patterns - Closures and execution context - Modules and imports/exports |
| Topic 4: Asynchronous Programming | 13% | - Async/await syntax - Promises and chaining - Event loop and micro/macro tasks - Fetch API and HTTP requests - Callbacks and callback hell |
| Topic 5: Server-Side JavaScript | 8% | - Core Node.js modules - Module system and require/import - Command-line tools and scripts - Node.js fundamentals and runtime |
| Topic 6: Debugging and Error Handling | 7% | - Console methods and logging - Debugging tools and breakpoints - Defensive programming practices - Error types and exception handling |
| Topic 7: Browsers and Events | 17% | - Script loading and execution order - Document Object Model (DOM) manipulation - Browser APIs and Web Storage - Window and document object properties - Event handling, propagation, and delegation |
Think of the JavaScript-Developer-I日本語 exam as Salesforce asking for proof, not promises: pass it, and you hold the Salesforce Certified JavaScript Developer I certification, a credential at the Intermediate / Developer level. The questions are built to measure applied skill across the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) objectives — the kind employers hire for. It also sits within a broader certification family covering Salesforce Certified Platform Developer I, Salesforce Certified Lightning Web Components Specialist, so one exam's effort keeps paying into the next.
The same 149 expert-written questions ship in all three — you're choosing how you want to live with the material:
Each version has its own strengths; many candidates mix them — PDF for reading, an engine for timed rehearsal.
The figures in the overview table above turn into strategy once you treat them as a budget: total time divided by total questions is your per-item allowance, and anything costing double gets flagged for a final sweep instead of a mid-exam standoff. Build the habit under a live timer — TorrentVCE's engine sessions enforce one — so the real clock feels like a rehearsal, not a surprise.
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Work in passes, not one grind. First pass: untimed, through all 149 questions, marking weak domains against the blueprint above. Second pass: timed engine sessions, reviewing every error the same day while the reasoning is fresh. Final pass: re-test only your flagged items until they stop being wrong. Book the exam when your timed scores hold steady — not when your calendar gets impatient.
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The blueprint above spans 7 domains — treat its weightings as a budget. A domain worth 17% of the score earns a matching share of your week, while lighter areas like Asynchronous Programming get maintained, not marathoned. Walk the full topic list domain by domain, and let the percentages decide where your practice hours land first.
コードを参照してください。
01 const event = new CustomEvent(
02 // コードが欠落しています
03 );
04 obj.dispatchEvent(event);
開発者は、recordId に関する情報を送信するために、update というカスタムイベントをディスパッチする必要があります。
2行目に挿入できる2つの選択肢はどれですか?
Correct Answer: A,D 🗳️
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以下のコードを参照してください。
const pi = 3.1415926;
円周率πのデータ型は何ですか?
Correct Answer: A 🗳️
Explanation: Only visible for TorrentVCE members. You can sign-up / login (it's free).
2つの式var1とvar2が与えられたとき、2つの式を連結した結果を文字列型として返すための有効な方法を2つ挙げてください。
Correct Answer: A,D 🗳️
Explanation: Only visible for TorrentVCE members. You can sign-up / login (it's free).
以下のコードを参照してください。
01 新しい Promise((resolve, reject) = > {
02 const fraction = Math.random();
03 if (fraction > 0.5) reject( ' fraction > 0.5, ' + fraction);
04 解決(分数);
05 })
06 .then(() = > console.log( ' 解決済み ' ))
07 .catch((error) => console.error(error))
08 .finally(() => console.log('いつ呼び出されますか?'));
8行目のPromise.finallyはいつ呼び出されますか?
Correct Answer: C 🗳️
Explanation: Only visible for TorrentVCE members. You can sign-up / login (it's free).
テストでは以下を検索します:
<button class="blue">チェックアウト</button>
しかし、実際のHTMLは次のとおりです。
<ボタン>チェックアウト</ボタン>
テストが失敗するのは、既に存在しないクラスを想定しているためです。
これはどのような種類のテスト結果ですか?
Correct Answer: A 🗳️
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