处理360极速浏览器不支持前端 ?. 判断写法

resources/beike/admin/views/pages/products/form/form.blade.php

@@ -221,7 +221,7 @@
                       </table>
                     </div>
                   </div>
-                  <input class="form-control d-none" :value="form.skus[0]?.variants?.length || ''" required>
+                  <input class="form-control d-none" :value="skuIsEmpty" required>
                   <div class="invalid-feedback" style="font-size: 16px"><i class="bi bi-exclamation-circle-fill"></i> {{ __('admin/product.add_variable') }}</div>
                 </div>
               </div>
@@ -349,6 +349,10 @@
           repeats.push(1);
           return repeats;
         },
+
+        skuIsEmpty() {
+          return (this.form.skus.length && this.form.skus[0].variants.length) || ''
+        }
       },
       watch: {
         'source.variables': {