ECMAScript

→ ecma-international.org

Introductions

ECMAScript is the scripting language that forms the basis of JavaScript.

→ developer.mozilla.org

Versions

ES2019

New and potential ES2019 JavaScript features every developer should be excited about - September 26, 2019

New features:

• Optional chaining: foo?.bar

• Pipeline operator: |>

• Object.fromEntries()

• [].flat(), [].flatMap()

• Optional catch binding: catch {}

• ''.trimStart(), ''.trimEnd()