Property 'keys' does not exist on type 'any[]'

Question

Next example in VS2017 reported error: Property 'keys' does not exist on type 'any []'

[].keys()

Why error?

Version of Visual Studio 2017 - 15.6.4

Version of TypeScript tools - 15.6.20202.3

Version of TypeScript - 2.8

seems to work fine in the playground https://www.typescriptlang.org/play/index.html#src=%5B%5D.keys()%3B — toskv, Mar 29 '18 at 22:55
@toskv Thanks! Question updated. Error in Visual Studio 2017. — Serj-Tm, Mar 29 '18 at 23:05

Serj-Tm · Accepted Answer · 2018-03-30T15:11:44.703

1

The problem fixed after tsconfig.json changing.

tsconfig.json

"compilerOptions": {
  ..
  "lib":["es2015"]
  ..
}

edited Mar 30 '18 at 15:11

answered Mar 29 '18 at 23:27

Serj-Tm

score 0 · Answer 2 · answered Jan 28 '20 at 11:11

0

"esnext" works for me when used in tsconfig.json. Using VS Code

answered Jan 28 '20 at 11:11

Gokhan Demirtas

2 Answers2