- Use of classes and introduction of arrow functions
- Utilization of Let and Cost keywords in variable
The most popular client-side frameworks in 2021 are React, VueJS, and Angular, etc.
JS Game Engines
The growing popularity of game development with JS has been observed in the past five years. There are many attractive games developed using this comprehensive programming technology out there.
JS for AI and MI
JS for IoT
Jscript served in the form of a reverse-engineered implementation of Netscape’s JS.
ECMAScript 2 was introduced in 1998, with minimal changes to its predecessor to keep up with the ISO standard for the technology.
In December 1999, ECMAScript 3 came into the market with lots of enhancements. ECMAScript 3 saw the introduction of the regular expression and exception handling features of this robust technology.
Immediately after the launch of ECMAScript 3, plans to bring ECMAScript 4 started in 2000. However, the entire process died down with the closure of this extensive project confirmed in 2003 after ECMA launched an interim report containing a few functionalities intended for ECMAScript 4.
In 2005, Mozilla and Eich joined ECMA so as to be able to help ECMAScript for XML, which then led to a comprehensive collaboration with Macromedia. Macromedia adopted JS and used E4X in ActionScript 3.
While the version ECMAScript 4 was abandoned, the real successor of ECMAScript 3 was finally launched in December 2009. It came with powerful functionalities like compatibility with the parsing of JSON files.
In 2013, new strategies were made for releasing the ECMAScript 6, but same as in the case of ECMAScript 4, the process experienced a downfall. However, the project didn’t die out entirely as it was launched later in June 2015.
ECMAScript has further seen the ECMAScript 2016, 2017, 2018, 2019, 2020, and 2021 versions, all launched in June of their various respective years.
ECMA International approved this comprehensive specification on June 22, 2021. ECMAScript 2021 includes the following functionalities:
This functionality provides product owners with an effective way to replace all instances of a substring in a string without utilizing a global regexp. There is evidence that developers worldwide are making continuous attempts to accomplish this in JS, with a global regex currently the most used way of achieving this. String.prototype.replace, meanwhile, affects only the first happening when utilized along with a string argument.
It is a new error type to represent multiple errors at once.
This features a promise combinator that short-circuits when any input value is fulfilled. Promise.any accepts an iterable of promises and provides back a single promise that resolves with the real value of that promise.
This feature is beneficial for referring to any target object without preserving it from garbage collection. The proposal encompasses significant pieces of functionality: building weak references to objects and operating user-defined finalizers after objects are garbage collected, with the help of FinalizationRegistry class.
It is required to register and deregister cleanup operations while the target objects are garbage collected.
This functionality is being built quite accurately to lower the number of cases resulting in implementation-defined sort order.
Separators for numeric literals
It enables developers to build numeric literals easily readable by building a visual separation between digit groups. Large numeric literals are tough to parse visually, specifically when there are frequent long digit repetitions.
Logical assignment operators
This comprehensive functionality helps in combining assignment expressions and logical operators. Underlying this effective proposal is the main reason why there are so many mathematical assignment operators, but none is useful for often-used logical operators.
ECMAScript 2021 follows its predecessor, ECMAScript 2020, which was formally approved in June 2020. ECMAScript 2020 introduced features ranging from the latest import facility for loading modules to a BigInt type to perform various functions with arbitrary precision integers.
Speed: Client-side JS is relatively quicker than other technologies because it can be run instantly within the client-side browser. Unless external resources are required, JS is unhindered by various network calls to an extensive backend server.
Server Load: Being client-side technology, it reduces the demands on the website server.
Rich User Interfaces: It offers developers the ability to build rich interfaces.
Easy to Debug
Easy to Edit