fix: disabled option are not selectable, close: #4699

components/cascader/demo/search.md

@@ -25,6 +25,10 @@ const options = [{
     children: [{
       value: 'xihu',
       label: 'West Lake',
+    }, {
+      value: 'xiasha',
+      label: 'Xia Sha',
+      disabled: true,
     }],
   }],
 }, {

components/cascader/index.tsx

@@ -239,6 +239,7 @@ export default class Cascader extends React.Component<CascaderProps, any> {
           path,
           label: render(inputValue, path, prefixCls),
           value: path.map(o => o.value),
+          disabled: path.some(o => o.disabled),
         };
       });
     }