How to Check if the Last Array Item is 'index.html' in JavaScript?

Obtaining the Last Item in an Array: A Check for 'index.html'

In JavaScript, extracting the last item from an array can be critical for various operations. Consider the following JavaScript snippet:

var linkElement = document.getElementById("BackButton");
var loc_array = document.location.href.split('/');
var newT = document.createTextNode(unescape(capWords(loc_array[loc_array.length-2])));
linkElement.appendChild(newT);

This code currently retrieves the second to last item from the loc_array, which is the URL array. However, the objective is to check if the last item in the array is "index.html" and, if so, retrieve the third to last item instead.

To achieve this, JavaScript provides a simple solution:

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

If the last item in the loc_array matches "index.html," the condition loc_array[loc_array.length - 1] === 'index.html' evaluates to true, executing the first block of code. Otherwise, it goes to the else block.

Additionally, to account for potential case-insensitive file systems, consider using toLowerCase() on the comparison, such as loc_array[loc_array.length - 1].toLowerCase() === 'index.html'.

While JavaScript enables these checks, it's worth mentioning that server-side checks are often preferred for improved performance and compatibility with non-JS users.

The above is the detailed content of How to Check if the Last Array Item is 'index.html' in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!