array literal notation is where you define a new array using just empty brackets. In your example:

var myArray = [];

It is the new way of defining arrays, and I suppose it is shorter/cleaner.

The examples below explain the difference between them:

var a = [],            // these are the same

    b = new Array(),   // a and b are arrays with length 0



    c = ['foo', 'bar'],           // these are the same

    d = new Array('foo', 'bar'),  // c and d are arrays with 2 strings



    // these are different:

    e = [3],             // e.length == 1, e[0] == 3

    f = new Array(3);   // f.length == 3, f[0] == undefined

Reference: What’s the difference between “Array()” and “[]” while declaring a JavaScript array?