In Angular, selectors are used to define the component or directive’s location in the HTML DOM structure. Here are different ways to use selectors in Angular:

Element Selector: This selector matches the HTML element tag name. The syntax for element selector is as follows:

selector: ‘app-component’
Here, the selector ‘app-component’ matches the tag in the HTML template.

Class Selector: This selector matches the CSS class name. The syntax for class selector is as follows:

selector: ‘.app-component’
Here, the selector ‘.app-component’ matches the HTML element with the class name ‘app-component’.

Attribute Selector: This selector matches the HTML attribute value. The syntax for attribute selector is as follows:

selector: ‘[app-component]’
Here, the selector ‘[app-component]’ matches the HTML element with the attribute name ‘app-component’.

ID Selector: This selector matches the HTML element with the specified ID. The syntax for ID selector is as follows:

selector: ‘#app-component’
Here, the selector ‘#app-component’ matches the HTML element with the ID ‘app-component’.

Structural Selector: This selector is used to define a directive that modifies the structure of the DOM. The syntax for structural selector is as follows:

selector: ‘[ngIf]’
Here, the selector ‘[ngIf]’ is used for a structural directive *ngIf that adds or removes elements from the DOM based on a condition.

These are different ways to use selectors in Angular, and each selector type has its own syntax and use case.