Drinks on the house :)

(mention you are with the Meetup)

Jan 21, 2020

JavaScript....the latest

https://2019.stateofjs.com/

🤔

Where are we today in the world of Web?

JS features

JS features

JS features

JS features

Chromium

Gecko

Webkit

Feature from the ECMAScript standard

How does the ECMAScript standard introduce a feature?

🤨

Stages to incorporate JS features

https://tc39.es/process-document/

No promise it will be introduced immediately, if ever 😳

2015

Batch of features that passed stage 4

ES6

(ES2015)

ES6

(ES2015)

http://es6-features.org

Constants

Arrow
Functions

Template
Literals

Modules

Classes

Iterators

Iterators

Generators

Map/Set

Promises

Proxy

Destructuring

ES7

(ES2016)

https://node.university/blog/7297/es7-es8-post

Array.prototype.includes

Exponentiation Operator

ES7

(ES2016)

https://node.university/blog/7297/es7-es8-post

Array.prototype.includes

Exponentiation Operator

ES8

(ES2017)

https://www.freecodecamp.org/news/es8-the-new-features-of-javascript-7506210a1a22/

Object.values()

Object.entries

Trailing Commas

Object.getOwnPropertyDescriptors()

String padding (padStart and padEnd)

Async/Await

Shared Memory

ES9

(ES2018)

https://medium.com/free-code-camp/es9-javascripts-state-of-art-in-2018-9a350643f29c

s ‘dotAll’ flag for regular expression

RegExp named capture groups

Rest/Spread Properties

RegExp Unicode Property Escapes

RegExp Look behind Assertions

Promise.prototype finally

Asynchronous Iteration

ES10

(ES2019)

https://medium.com/hackernoon/es2019-javascripts-new-features-in-2019-3427026af799

Optional catch binding

Subsume JSON

Object.fromEntries

Function.prototype.toString

Symbol.prototype.description

Well-formed JSON.stringify

String.prototype.{trimStart,trimEnd}

Array.prototype.{flat}

Array.prototype.{flatMap}

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