BTW, DOWNLOAD part of Lead2PassExam JavaScript-Developer-I dumps from Cloud Storage: https://drive.google.com/open?id=1HyUlygWbYTBgk4NHasAUj1Vm-PeT_I7I
If you are preparing for JavaScript-Developer-I exam and upset without accurate exam torrent and practice materials, Lead2PassExam guarantees you to pass exam at first attempt absolutely. Our JavaScript-Developer-I exam torrent is edited by latest official examination knowledge. Once official department change questions we will release new version of JavaScript-Developer-I Exam Torrent accordingly. We provide one year free update and service warranty for all products. You will have sufficient time to take part in exams.
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Real Exam Qty: | 60 |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Platform App Builder Salesforce Certified JavaScript Developer I |
| Available Languages: | English |
| Exam Duration: | 105 minutes |
| Exam Price: | USD 200 (may vary by region/tax) |
| Exam Format: | Multiple Choice, Multiple Select |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Recommended Training: | Salesforce Developer Learning Paths Salesforce Trailhead JavaScript Developer I Prep |
| Exam Registration: | Salesforce Credentials Page Salesforce Certification Registration (Webassessor) |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online proctored or onsite testing via Kryterion Webassessor |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper1 |
>> JavaScript-Developer-I Latest Study Materials <<
We are glad to introduce the JavaScript-Developer-I study materials from our company to you. We believe our study materials will be very useful and helpful for all people who are going to prepare for the JavaScript-Developer-I exam. There are a lot of excellent experts and professors in our company. In the past years, these experts and professors have tried their best to design the JavaScript-Developer-I Study Materials for all customers.
Salesforce JavaScript-Developer-I Certification Exam is designed to test an individual's knowledge of JavaScript and its implementation within the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is ideal for developers who have experience with JavaScript and want to specialize in building custom applications on the Salesforce platform. JavaScript-Developer-I Exam consists of 60 multiple-choice questions and must be completed within 105 minutes.
NEW QUESTION # 67
bar, awesome is a popular JavaScript module. the versions publish to npm are:
Teams at Universal Containers use this module in a number of projects. A particular project has the package, json definition below.
A developer runs this command: npm install.
Which version of bar .awesome is installed?
Answer: C
NEW QUESTION # 68
JavaScript:
01 function Tiger() {
02 this.type = ' Cat ' ;
03 this.size = ' large ' ;
04 }
05
06 let tony = new Tiger();
07 tony.roar = () = > {
08 console.log( ' They\ ' re great! ' );
09 };
10
11 function Lion() {
12 this.type = ' Cat ' ;
13 this.size = ' large ' ;
14 }
15
16 let leo = new Lion();
17 // Insert code here
18 leo.roar();
Which two statements could be inserted at line 17 to enable line 18?
Answer: A,C
Explanation:
There are two valid ways to ensure leo.roar() exists:
* Directly assign a roar function to leo (Option A). Assigning a property to an instance object creates a new method on that instance.
* leo.roar = () = > { console.log( ' They\ ' re pretty good! ' ); };
After this, calling leo.roar() is valid.
* Copy tony's properties into leo using Object.assign (Option B). Object.assign(target, source) copies enumerable own properties from the source object into the target object. Since tony.roar exists, executing:
* Object.assign(leo, tony);
copies roar into leo, making leo.roar() valid.
Why the other answers are incorrect:
* Option C: Object.assign(leo, Tiger) copies properties from the function object Tiger , not from Tiger.
prototype and not from a Tiger instance. Tiger (the function) has no roar property, so nothing useful is copied.
* Option D: leo.prototype is undefined because leo is an instance, not a constructor function. Only constructor functions have a .prototype property. This line would cause an error.
JavaScript Knowledge References (text-only)
* Instances have their own properties and do not contain a .prototype property.
* Object.assign(target, source) copies own enumerable properties of the source object.
* Assigning a function as a property of an object creates a callable method.
NEW QUESTION # 69
A developer is trying to handle an error within a function.
Which code segment shows the correct approach to handle an error without propagating it elsewhere?
A)
B)
C)
D)
Answer: B
NEW QUESTION # 70
A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed to do some custom initialization when the webpage is fully loaded with HTML content and all related files.
Which statement should be used to call personalizeWebsiteContent based on the above business requirement?
Answer: A
Explanation:
Two key browser events:
* DOMContentLoaded (fired on document): Fired when the HTML document has been completely loaded and parsed, without waiting for stylesheets, images, and subresources to finish loading.
* load (fired on window): Fired when the entire page is fully loaded, including all dependent resources such as stylesheets and images.
The requirement states:
"... when the webpage is fully loaded with HTML content and all related files." That matches the semantics of the load event on the window object.
So the correct code is:
window.addEventListener( ' load ' , personalizeWebsiteContent);
Why others are incorrect:
* A: DOMContentLoaded fires earlier, when HTML is parsed, but before all related files (images, some styles, etc.) are guaranteed to be loaded.
* B: ' onDOMContentLoaded ' is not a valid event name; the event is ' DOMContentLoaded ' .
* D: When using addEventListener, the event type is ' load ' , not ' onload ' . ' onload ' is the name of the handler property (window.onload = ...), not the event string.
Relevant concepts: window.load event, DOMContentLoaded, addEventListener syntax, page load lifecycle.
NEW QUESTION # 71
Refer to the following code:
What is the value of output on line 11?
Answer: C
NEW QUESTION # 72
......
JavaScript-Developer-I Boot Camp: https://www.lead2passexam.com/Salesforce/valid-JavaScript-Developer-I-exam-dumps.html
What's more, part of that Lead2PassExam JavaScript-Developer-I dumps now are free: https://drive.google.com/open?id=1HyUlygWbYTBgk4NHasAUj1Vm-PeT_I7I