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A service is a class that has functions to use in another class or module. This provides an interface for developers to...

A PHP HTTP client for fetching content from remote urls.

\Drupal::httpClient()

Default http client in Drupal (It's...

Once you've learned object oriented concepts, you're ready to approach a big project like Drupal. This class will...

Plugins extend or alter existing parts of a system. In Drupal, plugins are used for defining blocks, field types...

HTML Cache

When a server sends an HTML page, it can set caching instructions in the header that tell your browser how...

Create custom modules with the Drupal API.

It's helpful to think of the existing core and contrib code as examples of...

Bootstrapping is the process software uses to load itself, as in pulling yourself up by the bootstraps. For example...

These are built in classes and functions to handle some routine things.

core/lib/Drupal/Component/Utility/

Html

 cleanCs...

Snugug's explainer of CSS Houdini, the future browser API that allows JS to interact with CSS.

Uploaded images like screenshots can appear like parts of this site, since they are using the same theme.

Create an...