Coding Standards
Accessibility
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drupal/coding_standards
Coding Standards
drupal/coding_standards
Drupal Coding Standards
Drupal Coding Standards
Coding Standards
PHP
PHP
Introduction
PHP coding standards
API documentation and comment standards
API Documentation Samples
Namespaces
Naming standards for services and extending Symfony
Exceptions
PSR-4 and autoload
Placeholders and delimiters
E_ALL compliance
Automated tests
Accessibility
Accessibility
Accessibility
CSS
CSS
CSS coding standards
CSS formatting guidelines
CSScomb settings for Drupal (CSS formatting and sort tool)
CSS architecture (for Drupal 9)
CSS file organization
What to look for when reviewing CSS
JavaScript
JavaScript
Coding standards
Best practices
ESLint settings
API documentation and comment standard
JQuery coding standard
SQL
SQL
Coding conventions
Key words
Avoid "SELECT * FROM..."
TWIG
TWIG
Coding standard
Markup
Markup
Markup
Spelling
Spelling
Spelling
YAML
YAML
Release Notes
Composer
Composer
Naming convention
Accessibility
The Drupal coding standards for Accessibility.