Avail the Best Accurate New JavaScript-Developer-I Test Cost to Pass JavaScript-Developer-I on the First Attempt

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Salesforce JavaScript-Developer-I (Salesforce Certified JavaScript Developer I) Certification Exam is a highly sought-after certification for professionals who want to demonstrate their expertise in using JavaScript within the Salesforce platform. Salesforce Certified JavaScript Developer I Exam certification is designed to test the candidate's knowledge of JavaScript programming concepts, as well as their ability to use JavaScript in the context of Salesforce.

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q144-Q149):

NEW QUESTION # 144
is below:
<input type="file" onchange="previewFile()">
<img src="" height="200" alt="Image Preview..."/>
The JavaScript portion is:
01 function previewFile(){
02 const preview = document.querySelector('img');
03 const file = document.querySelector('input[type=file]').files[0];
04 //line 4 code
05 reader.addEventListener("load", () => {
06 preview.src = reader.result;
07 },false);
08 //line 8 code
09 }
In lines 04 and 08, which code allows the user to select an image from their local
computer , and to display the image in the browser?

A. 04 const reader = new File();
08 if (file) URL.createObjectURL(file);
B. 04 const reader = new FileReader();
08 if (file) reader.readAsDataURL(file);
C. 04 const reader = new FileReader();
08 if (file) URL.createObjectURL(file);
D. 04 const reader = new File();
08 if (file) reader.readAsDataURL(file);

Answer: B

NEW QUESTION # 145
Given the code below:

Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?

A. console.table(usersList) ;
B. console.info(usersList) ;
C. console.groupCol lapsed (usersList) ;
D. console.group(usersList) ;

Answer: D

NEW QUESTION # 146
Refer to the code below:
01 let car1 = new promise((_, reject) =>
02 setTimeout(reject, 2000, "Car 1 crashed in"));
03 let car2 = new Promise(resolve => setTimeout(resolve, 1500, "Car 2
completed"));
04 let car3 = new Promise(resolve => setTimeout (resolve, 3000, "Car 3
Completed"));
05 Promise.race([car1, car2, car3])
06 .then(value => (
07 let result = $(value) the race. `;
08 ))
09 .catch( arr => (
10 console.log("Race is cancelled.", err);
11 ));
What is the value of result when Promise.race executes?

A. Car 3 completed the race.
B. Race is cancelled.
C. Car 2 completed the race.
D. Car 1 crashed in the race.

Answer: C

NEW QUESTION # 147
Refer to the code below:
let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in")); let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed")); let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed")); Promise.race([car1,car2,car3])
.then(value=>{
let result = `${value} the race.`;
}).catch(err=>{
console.log('Race is cancelled.',err);
});
What is the value of result when promise.race execues?

A. Car2 completed the race.

Answer: A

NEW QUESTION # 148
Refer to the code below:

A developer import a library that creates a web server. the imported library uses events and callback to start the server.
Which code should be inserted at line 03 to set up an event and start the web server?

A. server( );
B. Server .start();
C. Server. on ('connet' , (port) => (
Console.log (Listening on' port);
}};
D. server ( (port) => (
Console.log ('Listening on' , port) ;
}};

Answer: D

NEW QUESTION # 149
......

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Avail the Best Accurate New JavaScript-Developer-I Test Cost to Pass JavaScript-Developer-I on the First Attempt

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q144-Q149):

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