Convert Object into an Array

Question

In development mode, items is an array but after I deploy the app, it turns into an object and I get the following error in the console:

Cannot find a differ supporting object '[object Object]' of type 'object'. NgFor only supports binding to Iterables such as Arrays.

In the component:

items = [];

getStorageItems(): any[] {
try {
return JSON.parse(localStorage.getItem('items'));
} catch(err) {
console.warn(err);
return [];
}
}

ngOnInit(): void {
this.items = this.getStorageItems();
}

In the HTML:

<tr *ngFor="let item of items">
<td>{{item.quantity}} </td>
<td>{{item.product_name }}</td>
</tr>