2026 Salesforce JavaScript-Developer-I: Latest Salesforce Certified JavaScript Developer (JS-Dev-101) Test Certification Cost

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Salesforce Platform Integration	- Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage
Testing and Debugging	- Debugging techniques and tools - Unit testing principles
Browser and DOM Interaction	- Event handling and propagation - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal
Asynchronous JavaScript	- Promises and async/await - Error handling in async workflows - Event loop and concurrency model
JavaScript Language Fundamentals	- Data types, variables, and operators - ES6+ syntax and features - Functions, scope, and closures

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JavaScript-Developer-I New Braindumps Sheet, Examcollection JavaScript-Developer-I Vce

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q90-Q95):

NEW QUESTION # 90
Cloud Kicks has a classto represent items for sale in an online store, as shown below:
Class Item{
constructor (name, price){
this.name = name;
this.price = price;
}
formattedPrice(){
return 's' + String(this.price);}}
A new business requirement comes in that requests a ClothingItem class that should have all of the properties and methods of the Item class but will also have properties that are specific to clothes.
Which line of code properly declares the clothingItem class such that it inherits from Item?

A. Class ClothingItem super Item {
B. Class ClothingItem {
C. Class ClothingItemimplements Item{
D. Class ClothingItem extends Item {

Answer: D

NEW QUESTION # 91
01 function Monster() { this.name = ' hello ' ; };
02 const m = Monster();
What happens due to the missing new keyword?

A. The m variable is assigned the correct object.
B. window.m is assigned the correct object.
C. window.name is assigned to ' hello ' and the variable m remains undefined.
D. The m variable is assigned the correct object but this.name remains undefined.

Answer: C

Explanation:
In JavaScript, when calling a constructor function without new:
const m = Monster();
the following happens:
* The function executes as a normal function , not as a constructor.
* Inside a regular function (in non-strict mode), this refers to the global object :
* In a browser: window
* So the line:
* this.name = ' hello ' ;
becomes:
window.name = ' hello ' ;
* Since Monster() does not return anything, its return value is undefined:
* const m = undefined;
Therefore:
* m is undefined
* window.name becomes " hello "
This matches option B .
JavaScript Knowledge References (text-only)
* Calling a function without new uses the global object as this in non-strict mode.
* Constructor functions must use new to create a new object.
* Functions without an explicit return return undefined.

NEW QUESTION # 92
Refer to the HTML below:

Which JavaScript statement results in changing " The Lion."?

A. document.querySelectorAll('$main $TONY').innerHTML = '" The Lion
B. document.querySelector('$main li:second-child').innerHTML = "The Lion ';
C. document.querySelector('$main li:nth-child(2)'),innerHTML = " The Lion. ';
D. document.querySelector('$main li.Tony').innerHTML = '" The Lion ';

Answer: A

NEW QUESTION # 93
Given the code below:
const delay = async delay =>{
return new Promise((resolve,reject)=>{
console.log(1);
setTimeout(resolve,deleay);
});
};
const callDelay = async ()=>{
console.log(2);
const yup = await delay(1000);
console.log(3);
}
console.log(4);
callDelay();
console.log(5);
What is logged to the console?

A. 4 2 1 5 3

Answer: A

NEW QUESTION # 94
Refer to the code below:

What is the value of foobDienu1 after the code executes?

A. {'Pizza' , Burger' , French fries ' , garlic bread; }
B. {'Garlic bread'}
C. {'Pizza' , Burger' , French fries '}
D. {'Garlic bread', Pizza' , Burger' , French fries'}

Answer: A

NEW QUESTION # 95
......

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