diff --git a/lib/zin/wg/docapp/js/v1.js b/lib/zin/wg/docapp/js/v1.js
index 786a0811c2..f8f9861255 100644
--- a/lib/zin/wg/docapp/js/v1.js
+++ b/lib/zin/wg/docapp/js/v1.js
@@ -1028,6 +1028,26 @@ const commands =
             }
         });
 
+    /**
+     * 加载指定的 API 文档。
+     * Load the specified API doc.
+     */
+    loadApi: function(_, args)
+    {
+        const apiID   = getApiID(args[0] || this.docID);
+        const version = args[1] || 0;
+        const release = args[2] || 0;
+        const select  = !!args[3];
+        $.getJSON($.createLink('api', 'ajaxGetApi', `apiID=${apiID}&version=${version}&release=${release}`), function(result)
+        {
+            if(!result || typeof result !== 'object') return;
+            result.id = `api.${apiID}`;
+            const docApp = getDocApp();
+            docApp.update('doc', result);
+            if(select) docApp.selectDoc(result.id);
+        });
+    },
+
     /**
      * 加载懒加载内容。
      * Load the lazy content.