added optional chaining operator to componentDidMount() method

frontend/src/Components/Table/index.js

@@ -51,7 +51,7 @@ class Table extends Component {
                 this.data[i]['requirement_owner'] = '<span>'+this.data[i]['requirement_owner']+'</span>';
                 this.data[i]['work-roles/specializations'] = '<span>'+this.data[i]['work-roles/specializations']+'</span>';
                 this.data[i]['topic'] = '<span>'+this.data[i]['topic']+'</span>';
-                if(this.data[i]['eval_links'].length > 0){this.data[i]['eval_links'] = '<div class="max-height">'+this.data[i]['eval_links']+'</div>';}
+                if(this.data[i]['eval_links']?.length > 0){this.data[i]['eval_links'] = '<div class="max-height">'+this.data[i]['eval_links']+'</div>';}
                 this.data[i]['children'] = '<div class="max-height">'+this.data[i]['children']+'</div>';
                 this.data[i]['description'] = '<div class="max-height">'+this.data[i]['description']+'</div>';
                 this.data[i]['ksat_id'] = '<i class="fa fa-plus"></i><i class="fa fa-minus"></i>'+this.data[i]['ksat_id'];
@@ -176,4 +176,4 @@ class Table extends Component {
     }
 }
 
-export default Table;
\ No newline at end of file
+export default Table;