What are the best practices to follow when declaring an array in Javascript?

Question

When I need to declare a new array I use this notation

var arr = new Array();

But when testing online, for example on jsbin, a warning sign

Answer 1

It's because new Array() is ambiguous. These are the correct constructors:

// Using brackets
[element0, element1, ..., elementN]

// Using new AND a list of elements
new Array(element0, element1, ..., elementN)

// Using new AND an integer specifying the array length
new Array(arrayLength)