What You Need to Know About the New JavaScript Features in ES2022

In June 2022, the 13th iteration of the JavaScript family will be released. This marks the 25th anniversary of the product’s debut in 1997. The features that will be included in the ECMAScript 2022 (ES2022) have gone through a rigorous process of verification by the Technical Committee 39 (TC-39). Any features that have been authorised by TC-39 and successfully implemented at least twice after testing have been approved for stage 4 verification. Furthermore, potential ES2022 capabilities that have completed stage 3 of the verification process and are pending implementation may also be included.

Alright, let’s get this party started!

Title Page | Contents |

– Learn about the essential new capabilities of ES2022.

  • Currently awaiting operator at the highest level
  • Expressed in terms of class fields
  • Confidential Procedures and Separated Domains
  • Type-level private static methods and static class-level fields
  • Indices for Matching Regular Expressions
  • Inspections of private-sector brands for ergonomics
  • Indexing using the.at() Function
  • Reasoning about time

Final Thoughts

Key ES2022 enhancements to JavaScript

As a developer, it is essential that you stay abreast of the latest advancements in the JavaScript language. This document outlines the Stage 4 additions that are set to be implemented and become stable releases in June of 2022. These additions will bring a variety of new capabilities to the JavaScript language, allowing developers to use the language more effectively and efficiently.

In JavaScript, you can do: ES2022 introduced the await operator as a block-level construct.

For some time, developers have been able to leverage the asynchronous capabilities of JavaScript within their projects. Previously, the use of the await keyword outside of an asynchronous context was not allowed, and would result in an error being displayed. Recently, however, it has been possible to declare await operators outside of asynchronous methods and classes, thus removing the issue of asynchronous timing. This now allows developers to wait for external modules to import the associated resources before executing the desired function.

import {getUser} from ‘. /data/User’
let user=await getUser();

Highlights of JavaScript include: A fourth stage: declaring fields in classes Function of ES2022

It is no longer necessary to invoke a constructor prior to declaring a class field. This requirement has been removed, so class fields can now be declared independently.

class hello{
fields=0;
title;
}

For the time being, this syntax will not result in an error notice.

Features of JavaScript: Internally-Only Methods and Fields

You want to create a private class declaration, right? Simply prefixing the phrase with # will allow you to achieve this.

class hello{
fields=0;
#title;
}

Just look at all the cool new things you can do with JavaScript.

Capabilities exclusive to JavaScript: static class fields and private static methods

A static class field is one that is not accessible in any object instances of the class, apart from the prototype. With the new capabilities of ES2022, the keyword “static” can be used to specify static class fields and private static features.

class hello {
name;
static title=’here’;
static get title(){
return title;
}
}

The “static” keyword is used to do catching, permanent settings, and object cloning.

Match indices for regular expressions are a new feature in JavaScript ES2022.

Thanks to the fourth stage of ES2022, it is now possible to request the beginning and end indices of a matched string simply by using the letter “d”. Prior to this development, the only way to obtain such indexing data was through a string-matching procedure.

Find out how to get a list of potential mates

  • You may do this using Regexp.exec, which will then list the results in order.
  • You can get an iterator by using String.matchAll.

const animals=’Animals:cow,dog,horse’
const regex=/(cow)/gd;
const matches=[…fruits.matchAll(regex)];
matches[0]

Ergonomic namechecks for protected fields are one of JavaScript’s cool new capabilities.

In prior versions of the software, if a user attempted to access a public field that had not been declared, an undefined error would be returned. Additionally, the same error message would be displayed if a user attempted to access a private field.

The ES2022 specification provides a straightforward approach to determining whether a certain field is present in a given class. This can be accomplished with greater accuracy utilising the “in” operator. Furthermore, these capabilities will be made available, including during private instruction.

class hello{
name;
#title;
get #title(){
return #title;
}
set #title(){
#title=null;
}
static hasTitle(obj1){
return #title in obj1;
}
}

One of JavaScript’s many handy features is the indexing function,.at().

In the past, when we wanted to access a specific element in an array, we used square brackets. This was a straightforward process, except when the need arose to perform a reverse iteration, which required us to use negative indexing. To use negative indexing, we needed to calculate the length of the string. This process was made significantly easier with the introduction of the .at() method.

array= [1.2.4.5]
console.log(array[array.length-1]);
console.log(array.at(-1));

The use of the .at() method is a convenient alternative to regular square bracket notation when working with indexes that start at 0. Furthermore, if a negative index is provided, the .at() method will initiate iteration from the end.

Time-based operations in JavaScript

It is expected that libraries such as Moment.js will be replaced by the third-stage ES2022 JavaScript functionality. If a Date object is unsuccessful, a Temporal will be the alternative. The Unix timestamp function will be the most analogous option for the Temporal function. This temporal function will be a global element that provides an excellent identifier for APIs that handle timestamps and dates. The temporal operating system will be used to manage dates, timings, time zones, and calendars.

Features of JavaScript: Synopsis

With the launch of the JavaScript ES2022 capabilities scheduled for June of 2022, we can assure you that the Stage 4 enhancements will be included in the final release. However, it is possible that the Stage 3 features may not be successfully developed in time and thus, may be left out of the ES2022 release. Nevertheless, these new features are expected to significantly reduce the amount of time it takes to complete tasks.

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