Exploring the differences between JavaScript destructuring and assignment

In my code, I initially used this line:

const availableDays = status.availableDays;

However, a suggestion was made to replace it with this line:

const { availableDays } = status;

Both options achieve the same result in one line of code, but I am curious as to why using destructuring is considered a better practice.

If the code were expanded to include multiple variables like so:

const availableDays = status.availableDays;
const someVar = status.someVar;
const someOtherVar = status.someOtherVar;

I understand that the most concise way to write this would be:

const { availableDays, someVar, someOtherVar } = status;

My question pertains to the potential impact on performance, security, readability, and other factors when deciding between these two approaches.

Answer №1

One benefit of this approach is the elimination of redundant identifiers for both property names and variables.

By doing so, the code becomes more succinct, improves readability/comprehension, and minimizes the chance of typographical errors. These advantages do not impact performance (excluding code length) or security (ignoring the likelihood of bugs).

Answer №2

Check out this example showcasing better readability:

let person = { name: "John", age: 30, gender: "male" };

function printDetails(info) {
   const name = info.name;
   const age = info.age;
   const gender = info.gender;

   // perform actions
}

This can be optimized as:

function printDetails({ name, age, gender }) {
   // perform actions
}

Such restructuring comes in handy when transferring props to React components.

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