if it's last item in array do not display javascript code example

Example 1: how to check the last item in an array javascript

const colors = ['red', 'yellow', 'green', 'blue']
const lastItem = colors[colors.length - 1]
console.log(lastItem)

Example 2: find last item in an array JS

if (loc_array[loc_array.length - 1] === 'index.html') {
   // do something
} else {
   // something else
}