Add custom 404 page suggestion script

This script retrieves the first three characters of the page_id from the URL and suggests valid related pages based on that.

Author: raghavs046

Modern Development/Service Portal Widgets/custom404/server.js

@@ -0,0 +1,20 @@
+(function() {
+    /*
+	This script will get the 3 characters of page_id from url and suggest valid pages.
+     */
+    data.pageArr = []; // array to store related pages
+    var pageId = $sp.getParameter('id').toString(); // get page id from url
+    // get 3 letters of page id
+    if (pageId && pageId.length() > 3)
+        pageId = pageId.substring(0, 3);
+
+    var relatedPages = new GlideRecord('sp_page');
+    relatedPages.addEncodedQuery('idLIKE' + pageId);
+    relatedPages.query();
+    while (relatedPages.next()) {
+        var tempList = {}; // temporary object.
+        tempList.name = relatedPages.getValue('title');
+        tempList.url = '/' + $sp.getValue('url_suffix') + '?id=' + relatedPages.getValue('id');
+        data.pageArr.push(tempList); // add related suggested pages to array
+    }
+})();