Skip to main content

Drupal 8 Themings

Why Create Subtheme in drupal 8 ,

If you directly change on main theme and update the new version then all the changes would be lost.

YAML file structure

1 - Tabs are NOT allowed. Use spaces ONLY.
2 - Properties and lists MUST be indented by two (2) spaces

let theme name is fullfillness

What are the files needed to create a theme

1 - .info.yml
2 - .libraries.yml
3 - .breakpoints.yml
4 - .theme


 - create fullfillness.info.yml 

 - if theme has space then, replace the underscore with space in file name and folder name
 - minimum required properties (name, type, and core)
 key value pair in the info.yml file

libraries (optional)

A list of libraries (which can contain both CSS and JavaScript assets) to add to all pages where the theme is active. Read more about themes and asset libraries.
libraries:
  - fluffiness/global-styling

libraries-override (optional)

A collection of libraries and assets to override. Read more at Overriding and extending libraries.
libraries-override:
  contextual/drupal.contextual-links:
    css:
      component:
        /core/themes/stable/css/contextual/contextual.module.css: false

libraries-extend (optional)

A collection of libraries and assets to add whenever a library is attached. Read more at Overriding and extending libraries.
libraries-extend:
  core/drupal.user:
    - classy/user1
    - classy/user2

hidden (optional)

Indicates whether or not to hide the theme from the "Appearance" page so that it cannot be enabled/disabled via the UI.
hidden: true

regions (optional)

A list of theme regions. (Note that region keys are not preceded by a dash.) A content region is required. Read more about adding regions to a theme.
regions:
  header: Header
  content: Content
  sidebar_first: 'First sidebar'

regions_hidden (optional)

A list of inherited regions to remove.
regions_hidden:
  - sidebar_last

Adding stylesheets (CSS) and JavaScript (JS) to a Drupal 8 theme : 


1 - By adding libraries , ( create the fluffiness.libraries.yml ) and add the css/js
cuddly-slider:
  version: 1.x
  css:
    theme:
      css/cuddly-slider.css: {}
  js:
    js/cuddly-slider.js: {}

 Attaching a library via a Twig template : 

 {{ attach_library('fluffiness/cuddly-slider') }}

In Drupal 8 drupal_add_css(), drupal_add_js() and drupal_add_library() were removed in favor of #attached

Attaching a library to a subset of pages : 

Implement the preprocess function to attach the library
function fluffiness_preprocess_maintenance_page(&$variables) {
  $variables['#attached']['library'][] = 'fluffiness/cuddly-slider';
}

fullfillness.Breakpoint.yml : 

Breakpoints are really just media queries with some additional metadata, such as name and multiplier information.

label - A human readable label for the breakpoint.
mediaQuery - Media query text proper, e.g. 'all and (min-width: 851px)'.
weight - Positional weight (order) for the breakpoint.
multipliers - Supported pixel resolution multipliers.

bartik.mobile:
  label: mobile
  mediaQuery: ''
  weight: 0
  multipliers:
    - 1x

Labels:

Comments

Post a Comment

Popular posts from this blog

Get The field values of node in Drupal 8

use Drupal \ node \ NodeInterface ; /** * Implements hook_ENTITY_TYPE_insert() for node entities. * * This tests saving a node on node insert. * * @see \Drupal\node\Tests\NodeSaveTest::testNodeSaveOnInsert() */ function node_test_node_insert ( NodeInterface $node ) { // Set the node title to the node ID and save. if ( $node - > getTitle ( ) == 'new' ) { $node - > setTitle ( 'Node ' . $node - > id ( ) ) ; $node - > setNewRevision ( FALSE ) ; $node - > save ( ) ; } } Now There is so many functions are there to get the values, For All the functions available visit the API code, https://api.drupal.org/api/drupal/core%21modules%21node%21src%21NodeInterface.php/interface/NodeInterface/8.2.x Some of as below, Node edit form, Drupal 8 Automatically Load the whole object no need to load the entity like below, if ($event->getFormId() == 'node_alexa_audio_clips_edit_form') { $node = \Drupal::ro...
Post a Comment
Read more

Dependency Injection in Drupal 8

Here are the important nuggets: DI is a design pattern used in programming. DI uses composition. DI achieves inversion of control. Dependency == service that your class needs == object of a certain type. Inject == provide == compose == assemble. Container == service container == dependency container. Instead of using  \Drupal::service('foo_service') , get the service from the  $container  if using a class. And the important reasons: Externalizing dependencies makes code easier to test. It allows dependencies to be replaced without interfering with other functionality. Retrieving dependencies from the container is better for performance. Services: node.grant_storage The easiest examples to find are services that have arguments, because you can search *.services.yml files for the word "arguments". In  node.services.yml  for example, there is this entry: node.grant_storage: class: Drupal\node\NodeGrantDatabaseStorage argument...
Post a Comment
Read more

Mysql Interview Questions

Current mysql version : 8 ( last was 5.7 ,  5.7 to directly 8 ) SHOW FULL PROCESSLIST is used to see all the query executing when refresh the site. 1 second == 1000 mili second, 0-500 ms responce time of any query is ok How to Read the MySQL Slow Query Log :   The MySQL slow query log is where the MySQL database server registers all queries that exceed a given threshold of execution time. This can often be a good starting place to see which queries are slowest and how often they are slow. MySQL on your server is configured to log all queries taking longer than 0.1 seconds. /var/log/mysql/mysql-slow.log Use EXPLAIN or EXPLAIN EXTENDED to explain the query how it is executed. MySQL  describe  or  ANALYZE  command shows the structure of the table. Best practice in respect of performance : 1 - always use index, 2 - index types , primary index and combined field index like fname & lname in one index not two index, 3 - one index sc...
Post a Comment
Read more