Javascript-How-To-Find-All-Broken-Links-On-Web-page-Tutorial

Javascript How To Find All Broken Links On Web page Tutorial

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Inside this article we will see the concept i.e Javascript How To Find All Broken Links On Web page Tutorial. Article contains the classified information about How to check broken links on a web page using javascript.

If you are looking for a solution of finding all broken links inside your website’s web pages, then you can use this concept to your code. You will get the very basic and super easy concept to do this.

Read More: How To Check 404 Not Found URL Status in Javascript Tutorial

Let’s get started.

Application Programming

Let’s create a folder with name broken-links in your localhost directory. In this project folder, create a file: index.html

Open index.html and write this complete code into it.

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Javascript How To Find All Broken Links From Web page Tutorial</title>
</head>

<body>

    <a id="link1" href="http://example1.com">Link 1</a>
    <a id="link2" href="http://example2.com">Link 2</a>
    <a id="link3" href="http://example3.com">Link 3</a>
    <a id="link4" href="http://example4.com">Link 4</a>
    <a id="link5" href="http://example5.com">Link 5</a>

    <script>
        var all_links = document.getElementsByTagName("a");

        for (var i = 0; i < all_links.length; i++) {

            var link_tag = all_links[i];

            var link_source = link_tag.getAttribute("href");

            if (UrlExists(link_source)) {

                console.log("Exists");
            } else {

                console.log("Not Found");
            }
        }

        // User helper function to Check Page Status
        function UrlExists(url) {

            var http = new XMLHttpRequest();
            http.open('HEAD', url, false);
            http.send();
            if (http.status != 404)
                return true;
            else
                return false;
        }
    </script>
</body>

</html>

Concept

Here, you can see we used a helper (User defined function) which checks a URL exists or not.

function UrlExists(url) {
    var http = new XMLHttpRequest();
    http.open('HEAD', url, false);
    http.send();
    if (http.status != 404)
        return true;
    else
        return false;
}

Application Testing

Open your browser.

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Next,

Your project URL will be like this.

URL: http://localhost/broken-links/index.html

You will see your output into browser’s console.

We hope this article helped you to learn Javascript How To Find All Broken Links On Web page Tutorial in a very detailed way.

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