ok

src/webparts/homeDetailsList/components/HomeDetailsList.tsx

@@ -25,6 +25,7 @@ export interface IDetailsListBasicExampleItem {
 export interface IDetailsListBasicExampleState {
   items: IDetailsListBasicExampleItem[];
   selectionDetails: string;
+  itemsAux: IDetailsListBasicExampleItem[];
 }
 
 export default class HomeDetailsList extends React.Component<IHomeDetailsListProps, IDetailsListBasicExampleState> {
@@ -65,9 +66,10 @@ export default class HomeDetailsList extends React.Component<IHomeDetailsListPro
         }
   
       ],
-      selectionDetails: ''
+      selectionDetails: '',
+      itemsAux: []
     };
-   
+      
     this._selection = new Selection({
       onSelectionChanged: () => this.setState({ selectionDetails: this._getSelectionDetails() }),
     });    
@@ -81,9 +83,12 @@ export default class HomeDetailsList extends React.Component<IHomeDetailsListPro
 
   }
 
+  componentDidMount() {
+      this.setState({ itemsAux: this.state.items });
+  }
 
   public render(): React.ReactElement<IHomeDetailsListProps> {
-    const { items, selectionDetails } = this.state;
+    const { items, itemsAux, selectionDetails } = this.state;
    
 
     return (
@@ -99,7 +104,7 @@ export default class HomeDetailsList extends React.Component<IHomeDetailsListPro
         <Announced message={`Number of items after filter applied: ${items.length}.`} />
         <MarqueeSelection selection={this._selection}>
           <DetailsList
-            items={items}
+            items={itemsAux}
             columns={this._columns}
             setKey="set"
             layoutMode={DetailsListLayoutMode.justified}
@@ -131,11 +136,11 @@ export default class HomeDetailsList extends React.Component<IHomeDetailsListPro
 
     this.setState({
       
-      items: text ? this.state.items.filter(i => i.name.toLowerCase().indexOf(text) > -1) : this.state.items,
+      itemsAux: text ? this.state.items.filter(i => i.name.toLowerCase().indexOf(text) > -1) : this.state.items,
 
      
     });
-    alert(`que es lo que aparece: ${text} ${this.state.items.length}`);
+    //alert(`que es lo que aparece: ${text} ${this.state.items.length}`);
   }
 
   private _onItemInvoked = (item: IDetailsListBasicExampleItem): void => {