This commit aligns the code in `product-alerts.component.ts` with [product-alerts.component.1.ts][1], since both files are supposed to represent the same component in different points in time. It also makes the necessary changes in the respective templates. This is a follow-up to #41999. [1]: https://github.com/angular/angular/blob/e86a1d3441b30776e28c0216f00610d6787de297/aio/content/examples/getting-started/src/app/product-alerts/product-alerts.component.1.ts#L18 PR Close #42155