推荐检查项没内容时，开单按钮置灰

src/components/PushItems/index.jsx

@@ -229,7 +229,12 @@ class PushItems extends Component {
             <div className={style["recommend"]}>
               <h1>
                 <img src={recommendImg} />
-                推荐检验检查<div className={style["billing"]}  onClick={billing}>开单</div>
+                推荐检验检查
+                <div className={style["billing"]} 
+                     style={assay.length === 0 && check.length === 0 ? {color: 'gray', border: '1px solid gray'} : ''} 
+                     onClick={assay.length === 0 && check.length === 0 ? billing :''}>
+                    开单
+                </div>
               </h1>
               <div>
                 {assay.length === 0 && check.length === 0 ? (