Understanding Object Literal Enhancement In Javascript

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title: Understanding Object Literal Enhancement In Javascript published: true date: 2022-04-12 00:13:21 UTC tags: canonical_url: cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/zyw1h7rhpz8sadipvky3.png

Definition

Object literal enhancement is the opposite of destructuring. it's the process of restructuring or putting the object back together.

Remember in my previous blog, i talked about about Array and Object destructuring, and stated that destructuring is the process of unpacking a small part of something from the main part. Well, with object literal enhancement , we can grab variables from the global scope and add them to an object.

const name = "Tallac"
const elevation = 9738
const funHike = {name, elevation}
console.log(funHike); //{name: "tallac", elevation: 9738}

name and elevation are now keys of the funHike object.

We can also create object methods with object literal enhancement or restructuring.

const name = "Tallac"
const elevation = 9738
const print = function(){
    console.log(`Mt. ${this.name} is ${this.elevation} feet tall`)
}
const funHike = {name, elevation, print}
funHike.print(); // Mt. Tallac is 9738 feet tall

Notice we use this keyword to access the object keys.

When defining object methods, it's no longer necessary to use the function keyword.

//old
var skier = {
  name: name,
  sound: sound,
  powderYell: function () {
    var yell = this.sound.toUpperCase();
    console.log(`${yell} ${yell} ${yell}!!!`);
  },
  speed: function (mph) {
    this.speed = mph;
    console.log("speed", mph);
  },
};

// New
const skier = {
  name,
  sound,
  powderYell() {
    let yell = this.sound.toUpperCase();
    console.log(`${yell} ${yell} ${yell}!!!`);
  },
  speed(mph) {
    this.speed = mph;
    console.log("speed", mph);
  },
};

Conclusion

In conclusion, Object Literal Enhancement allows us to pull global variables into object and reduce typing by making th function keyword unnecessary.

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