👉 [javascript.christmas] - 9 new features in ES2019
That is String.trimStart(), String.trimEnd(), Object.fromEntries(), Array.flat(), Array.flatMap(), Symbol.description, JSON.ECMAScript (JSON Superset), JSON ⊂ ECMAScript (JSON Superset)
👉 [javascript.christmas] - How ... works in Javascript
The ... operator that arrived to javascript with ES6 is really handy, and can be used in quite a lot of situations. Technically it is two different things; a Rest parameter and a spread operator. Let's take a look at how they work.
