Fixed #284 - FilterPlaceholder for Listbox

src/components/listbox/Listbox.d.ts

@@ -12,6 +12,7 @@ export declare class Listbox extends Vue {
     multiple?: boolean;
     metaKeySelection?: boolean;
     filter?: boolean;
+    filterPlaceholder?: string;
     filterLocale?: string;
     ariaLabelledBy?: string;
     $emit(eventName: 'input', value: any): this;

src/components/listbox/Listbox.vue

@@ -2,7 +2,7 @@
     <div class="p-listbox p-inputtext p-component">
         <div class="p-listbox-header" v-if="filter">
             <div class="p-listbox-filter-container">
-                <input type="text" class="p-inputtext p-component" v-model="filterValue">
+                <input type="text" class="p-inputtext p-component" v-model="filterValue" :placeholder="filterPlaceholder">
                 <span class="p-listbox-filter-icon pi pi-search"></span>
             </div>
         </div>
@@ -36,6 +36,7 @@ export default {
         multiple: Boolean,
         metaKeySelection: Boolean,
         filter: Boolean,
+        filterPlaceholder: String,
         filterLocale: String
     },
     optionTouched: false,

src/views/listbox/ListboxDoc.vue

@@ -137,6 +137,12 @@ data() {
                                 <td>false</td>
                                 <td>When specified, displays a filter input at header.</td>
                             </tr>
+                            <tr>
+                                <td>filterPlaceholder</td>
+                                <td>string</td>
+                                <td>null</td>
+                                <td>Placeholder text to show when filter input is empty.</td>
+                            </tr>
                             <tr>
                                 <td>filterLocale</td>
                                 <td>string</td>