What manner must I understand this syntax?

Question

What manner must I understand this syntax?

After stumbling upon this code snippet online, I was left scratching my head:

function cjsDetectionPlugin() {
  return {
    name: 'cjs-detection',
    moduleParsed({
      id,
      meta: {
        commonjs: { isCommonJS }
      }
    }) {
      console.log(`File ${id} is CommonJS: ${isCommonJS}`);
    }
  };
}

While I can see that the JavaScript syntax is correct, I'm struggling to wrap my head around it. In the cjsDetectionPlugin function, an object is being returned, but what exactly is going on with the moduleParsed line? Is it translating into a property name somehow?

My main confusion lies in how this object is able to contain a sub-property that executes code (console.log...).

This leaves me wondering - what's the deal here? Where can I go to delve into the specifics of this syntax and gain a better understanding of it?

javascript ecmascript-6

Answer 1

Answer №1

Object Destructuring is the term for unpacking properties from objects when passed as a function parameter. To learn more about it, check out this link: Object Destructuring

An example of using object destructuring in a function parameter is shown below:

function displayName({ name }) {
    console.log(`Hello, my name is ${name}`);
}

This code snippet is essentially doing the same thing as the following alternative version:

function displayName(person) {
    console.log(`Hello, my name is ${person.name}`);
}

Answer 2

Object Destructuring is the term for unpacking properties from objects when passed as a function parameter. To learn more about it, check out this link: Object Destructuring

An example of using object destructuring in a function parameter is shown below:

function displayName({ name }) {
    console.log(`Hello, my name is ${name}`);
}

This code snippet is essentially doing the same thing as the following alternative version:

function displayName(person) {
    console.log(`Hello, my name is ${person.name}`);
}

Answer 3

Answer №2

Here we have an example of a Method declaration:

function cjsDetectionPlugin() {
  return {
    name: 'cjs-detection',
    moduleParsed() {
      console.log('some logs');
    }
  };
}

Additionally, there is a demonstration of Destructuring assignment: Unpacking properties from objects passed as a function parameter:

function moduleParsed(/*begin: parameters*/{
  id,
  meta: {
     commonjs: { isCommonJS }
  }
}/*end: parameters*/) {
      console.log(`File ${id} is CommonJS: ${isCommonJS}`);
}

Answer 4

Here we have an example of a Method declaration:

function cjsDetectionPlugin() {
  return {
    name: 'cjs-detection',
    moduleParsed() {
      console.log('some logs');
    }
  };
}

Additionally, there is a demonstration of Destructuring assignment: Unpacking properties from objects passed as a function parameter:

function moduleParsed(/*begin: parameters*/{
  id,
  meta: {
     commonjs: { isCommonJS }
  }
}/*end: parameters*/) {
      console.log(`File ${id} is CommonJS: ${isCommonJS}`);
}

What manner must I understand this syntax?

Answer №1

Answer №2

Similar questions

showcasing a set of div elements by using forward and backward buttons

accordions that are supposed to adapt to different screen sizes are

Learn how to call class methods using jQuery events by utilizing the on() method

A capability that operates on an array of pairs as its parameter, where the primary component of each pair signifies the superior category of the secondary

What is a method for capturing the value of a nested input element without requiring its ID to be

Setting the button value to a textbox and refreshing the status information (Codeigniter)

Leveraging Angular to retrieve images from Google Feed API

Having trouble with Angular JS's ngRoute feature not functioning properly

Tips for validating multiple forms on a single page without altering the JavaScript validation structure

How to include a javascript file in a different file and compile it using Node.js

Exploring unescaped XML for handling unicode characters

Encountering an issue when attempting to downgrade React Native version from 0.51 to 0.45

Angular HttpClient request fails to initiate

Can you identify the variances in the React codes provided? Is one more optimized or impactful than the other, or do they essentially perform the same function?

Display a date that is asynchronously rendered for each item in the v-for loop

How to retrieve the value of a selected radio button in an AngularJS radio button group that uses ng-repeat

The entire DOM in Angular2+ flickers upon loading a component using ngFor

JavaScript code returning the correct result, however, it is unable to capture all characters in the returned string

Encountering difficulties with implementing and utilizing bootstrap in Symfony 5.3 with Encore plugin

What is the proper way to link an image in a nuxt project?