Exploring ES2018 and ES2019

• Category: Computer
• Author: Axel Rauschmayer
• File type: HTML and PDF

Read and download free eBook intituled Exploring ES2018 and ES2019 in format HTML and PDF created by Axel Rauschmayer.

This book is about two versions of JavaScript: ECMAScript 2018 and ECMAScript 2019. It covers what’s new in both versions.

ECMAScript 2018 introduced support for asynchronous iteration via the AsyncIterator protocol and async generators. It also included four new regular expression features: the dotAll flag, named capture groups, Unicode property escapes, and look-behind assertions. Lastly it included rest parameter and spread operator support for object properties.

ECMAScript 2019 includes Object.fromEntries(), trimStart(), trimEnd(), flat(), flatMap(), description property for symbol objects, optional catch binding, and more.

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Exploring ES2018 and ES2019