What is the process for including additional properties with the JS spread operator?

Question

What is the process for including additional properties with the JS spread operator?

Is there a more efficient way to achieve this task other than adding patientId and insuranceId to the spread operator in the code below?

main.js

const Response = await getData(re);
const patientId = "AW364747";
const insuranceId = "0000786622";


logger().info('Response=', { ...Response, drugName: '[REDACTED]' , patientId, insuranceId});

javascript arrays ecmascript-6

Answer 1

Answer №1

You are on the right track.

let updatedResponse = {...Response, drugName: '[REDACTED]'}

This code snippet will add the drugName property to the Response object if it is missing, or it will overwrite the existing drugName property.

let updatedResponse = { drugName: 'defaultname', ...Response}

Conversely, this code will either override the drugName property in Response with 'defaultname', or add the drugName property if it does not already exist.

Here are some examples:

const Response = { prop: 'some prop', drugName: 'Original Drug'}

const spreadFirst = { ...Response, drugName: 'New drug'}
// spreadFirst = { prop: 'some prop', drugName: 'New drug'}

const spreadLast = { drugName: 'Newest Drug', ...Response}
// spreadLast = { prop: 'some prop', drugName: 'Original Drug'}

Answer 2

You are on the right track.

let updatedResponse = {...Response, drugName: '[REDACTED]'}

This code snippet will add the drugName property to the Response object if it is missing, or it will overwrite the existing drugName property.

let updatedResponse = { drugName: 'defaultname', ...Response}

Conversely, this code will either override the drugName property in Response with 'defaultname', or add the drugName property if it does not already exist.

Here are some examples:

const Response = { prop: 'some prop', drugName: 'Original Drug'}

const spreadFirst = { ...Response, drugName: 'New drug'}
// spreadFirst = { prop: 'some prop', drugName: 'New drug'}

const spreadLast = { drugName: 'Newest Drug', ...Response}
// spreadLast = { prop: 'some prop', drugName: 'Original Drug'}

Answer 3

Answer №2

Implementing a more straightforward and concise strategy

let Response = { name: 'John' }; // await fetchUserData(re);

Response.drugName    = '[REDACTED]'; 
Response.patientId   = 'AW364747';
Response.insuranceId = '0000786622';

console.log(Response)

Answer 4

Implementing a more straightforward and concise strategy

let Response = { name: 'John' }; // await fetchUserData(re);

Response.drugName    = '[REDACTED]'; 
Response.patientId   = 'AW364747';
Response.insuranceId = '0000786622';

console.log(Response)

What is the process for including additional properties with the JS spread operator?

Answer №1

Answer №2

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