what does an empty array look like in javascript code example

Example 1: javascript empty array

var arr1 = ['a','b','c','d','e','f'];
var arr2 = arr1;  // Reference arr1 by another variable 
arr1 = [];
console.log(arr2); // Output ['a','b','c','d','e','f']

Example 2: empty array javascript

// set array
arr = [1,2,4];

// empty array
arr = [];