## Example Library
In a module.libraries.yml file.
```
dashboard:
  js:
    js/dashboard.js: {}
  dependencies:
    - core/drupal
    - core/jquery
```

## Adding Libraries
### In preprocess function or controller function.
```
$variables['#attached']['library'][] = 'lotus/lotus-js';
```

### In twig template file.
```
{{ attach_library('hcpl_zen/title-record') }}
```

### In a view (pre render hook).
```
$view->element['#attached']['library'][] = 'custom/custom_view';
```

## Miscellaneous
### Overriding libraries
```
// Libraries is an array of the library data.
// Extension is 'core' or the module/theme that defined the libraries.
function hook_library_info_alter(&$libraries, $extension)
```