Views exposed filters without "Apply" button

For Drupal 8/9, You need the following module: https://www.drupal.org/project/views_autosubmit

If you're using Drupal 8. Choose Exposed form style as Autosubmit and then in Settings check Hide submit button checkbox.

Under advanced portion of view choose following

**Exposed form**

 Exposed form style: Basic | Settings 

Then Choose autosubmit in Settings as shown below

This will hide the Apply button and the select list to work directly on selecting an item, instead of clicking on the Apply button.