Demo update

src/views/datatable/DataTableFilterDemo.vue

@@ -199,6 +199,7 @@ export default {
         width: 100%;
     }
 }
+
 .p-dropdown-car-option {
     img {
         vertical-align: middle;

src/views/treetable/TreeTableFilterDemo.vue

@@ -168,6 +168,10 @@ export default {
 }
 </script>
 
-<style scoped>
-
+<style scoped lang="scss">
+.p-filter-column {
+    .p-multiselect, .p-dropdown, .p-inputtext {
+        width: 100%;
+    }
+}
 </style>