Use of semicolons in ES6 [duplicate]

Question

I was under the impression semicolons became obsolete with ES6. However, I came across this today:

Doesn't work:

let i = 0  [0, 1, 2, 3, 4, 5, 6].forEach(item => console.log(item)) 

Works:

let i = 0;  [0, 1, 2, 3, 4, 5, 6].forEach(item => console.log(item)) 

Why is the semicolon necessary here, and when should I use them?

Answer 1

Without the semicolon [1,2,3,4,5,6] will be evaluated as property access. Which is perfectly fine JS, I personally don't think that adding semicolons is such a big deal so I keep using them.