The `<ng-content>` element specifies where to project content inside a component template.

## Attributes

| Attribute | Description                                                             |
| --------- | ----------------------------------------------------------------------- |
| `select`  | CSS selector. Matching elements are projected into this `<ng-content>`. |

Only select elements from the projected content that match the given CSS `selector`.

Angular supports [selectors](https://developer.mozilla.org/docs/Web/CSS/CSS_Selectors) for any
combination of tag name, attribute, CSS class, and the `:not` pseudo-class.
