• VSCode Version: 1.18.1
• OS Version: macOS

Steps to Reproduce:

1. Create array:

const arr = [];

2. Try to get autocomplete for includes. There's no such, because you need to create jsconfig.json and set target to es2016.

My suggestion is to use "target": "es2016" by default in VS Code instead of es2015. I don't really like the idea to create jsconfig.json if I want to get proper autocomplete.

Thank you!

cc @mjbvz