MediaWiki:Gadget-SelectionCounter.js：修订间差异

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行内

@@ 第7行： / 第7行： @@
 mw.loader.using(['mediawiki.util']).then(function () {
+    if (window.SelectionCounterLoaded) {
-    var $counter = $('#mw-selection-counter');
+        return;
-    if (!$counter.length) {
-        $counter = $('<div id="mw-selection-counter" class="mw-selection-counter" role="status" aria-live="polite"></div>')
-            .hide()
-            .appendTo('body');
     }
+    window.SelectionCounterLoaded = true;
-    var rafId = null;
+    $(function () {
+        var $counter = $('#mw-selection-counter');
+        if (!$counter.length) {
-    function getSelectionText() {
+            $counter = $('<div id="mw-selection-counter" class="mw-selection-counter" role="status" aria-live="polite"></div>')
-        var selection = window.getSelection();
-        if (!selection || selection.isCollapsed) {
+                .hide()
-            return '';
+                .appendTo('body');
         }
-        return String(selection).trim();
-    }
+        var rafId = null;
-    function updateCounter() {
-        rafId = null;
-        var active = document.activeElement;
-        if (active && (active.tagName === 'INPUT' || active.tagName === 'TEXTAREA' || active.isContentEditable)) {
-            $counter.hide();
-            return;
-        }
-        var text = getSelectionText();
+        function getSelectionText() {
+            var selection = window.getSelection();
-        if (!text) {
-            $counter.hide();
+            if (!selection || selection.isCollapsed) {
-            return;
+                return '';
+            }
+            return String(selection).trim();
         }
-        var count = Array.from(text).length;
+        function updateCounter() {
-        $counter.text('已选 ' + count + ' 字').show();
+            rafId = null;
+            var active = document.activeElement;
-    }
+            if (active && (active.tagName === 'INPUT' || active.tagName === 'TEXTAREA' || active.isContentEditable)) {
+                $counter.hide();
+                return;
+            }
+            var text = getSelectionText();
-    function scheduleUpdate() {
-        if (rafId) {
+            if (!text) {
-            return;
+                $counter.hide();
+                return;
+            }
+            var count = Array.from(text).length;
+            $counter.text('已选 ' + count + ' 字').show();
+        }
+        function scheduleUpdate() {
+            if (rafId) {
+                return;
+            }
+            rafId = window.requestAnimationFrame(updateCounter);
         }
-        rafId = window.requestAnimationFrame(updateCounter);
-    }
-    document.addEventListener('selectionchange', scheduleUpdate);
+        document.addEventListener('selectionchange', scheduleUpdate);
-    document.addEventListener('mouseup', scheduleUpdate);
+        document.addEventListener('mouseup', scheduleUpdate);
-    document.addEventListener('keyup', scheduleUpdate);
+        document.addEventListener('keyup', scheduleUpdate);
-    document.addEventListener('touchend', scheduleUpdate, { passive: true });
+        document.addEventListener('touchend', scheduleUpdate, { passive: true });
+    });
 });