MediaWiki:Common.js: Difference between revisions

Retrieved from "https://kingwarzcharts.com/wiki/MediaWiki:Common.js"

@@ Line 77: / Line 77: @@
      });
 }());
+/* "Did you know…" rotator (Template:DYK). The template ships the whole
+ * weekly fact pool; server HTML is parser-cached, so each page view picks
+ * 4 facts at random client-side. */
+(function () {
+    function rotateDyk() {
+        var pools = document.querySelectorAll('.kwc-dyk-pool');
+        Array.prototype.forEach.call(pools, function (root) {
+            if (root.getAttribute('data-kwc-rotated')) { return; }
+            root.setAttribute('data-kwc-rotated', '1');
+            var items = root.querySelectorAll('ul > li');
+            if (items.length <= 4) { return; }
+            var idx = [];
+            for (var i = 0; i < items.length; i++) { idx.push(i); }
+            for (var j = idx.length - 1; j > 0; j--) {
+                var k = Math.floor(Math.random() * (j + 1));
+                var t = idx[j]; idx[j] = idx[k]; idx[k] = t;
+            }
+            var keep = {};
+            for (var c = 0; c < 4; c++) { keep[idx[c]] = true; }
+            for (var n = 0; n < items.length; n++) {
+                if (!keep[n]) { items[n].style.display = 'none'; }
+            }
+        });
+    }
+    mw.hook('wikipage.content').add(rotateDyk);
+})();