The tooltip that shows the expression type (Cmd/Ctrl-hover) in JavaScript and TypeScript files now has a syntax highlighting. 

WebStorm 2019.1: smart intentions for JavaScript, improvements in Angular support, updated CSS and HTML docs, and new debug console 

JavaScript is often said to be the easiest language to start with and the hardest to master.

MathJax is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers 

Samples for Stimulsoft Reports.JS - a reporting tool for Node.js, JavaScript, ASP.NET, PHP, Angular and Angular 2 applications 

Sgvizler2 is a javascript wrapper for easy visualisation of SPARQL result sets (and a jQuery plugin).  Demo

Ultimate Javascript Object Signing and Encryption (JOSE) and JSON Web Token (JWT) Implementation for .NET and .NET Core  

Mohamed Hegazy provides a guided tour to TypeScript, showing how the language and toolset simplify application-scale JavaScript development 

Learn about functional data structures and their uses in this overview of Facebook's popular library for JavaScript: Immutable.js 

JavaScript has multiples ways of defining a function. There are function declarations, function expressions, and (since ECMAScript 2015) arrow functions.