Creating Custom Structural Directives in Angular

{
  "title": "Creating Custom Structural Directives in Angular",
  "description": "Explore how to design and implement custom structural directives to enhance your Angular application's templating capabilities.",
  "category": "Angular Cursor Rules",
  "rules": [
    {
      "name": "Use Descriptive and Unique Directive Selectors",
      "description": "Ensure that custom structural directive selectors are descriptive and unique to prevent conflicts and enhance code readability.",
      "recommendation": "Prefix directive selectors with a unique identifier related to your application or organization. For example, use 'appCustomIf' instead of 'customIf'."
    },
    {
      "name": "Encapsulate Reusable Logic",
      "description": "Encapsulate reusable logic within structural directives to promote modularity and maintainability.",
      "recommendation": "Move common behaviors, such as conditional rendering or dynamic content insertion, into structural directives to avoid code duplication and enhance reusability."
    },
    {
      "name": "Optimize Performance with Efficient Change Detection",
      "description": "Implement efficient change detection strategies within structural directives to maintain application performance.",
      "recommendation": "Use Angular's 'ChangeDetectorRef' to manually control change detection cycles when necessary, and avoid unnecessary DOM manipulations within directives."
    },
    {
      "name": "Implement Proper Error Handling",
      "description": "Ensure that structural directives handle potential errors gracefully to prevent runtime issues.",
      "recommendation": "Anticipate and manage potential errors, such as invalid input types or operations on undefined elements, within the directive's logic to enhance robustness."
    },
    {
      "name": "Leverage Angular's TemplateRef and ViewContainerRef",
      "description": "Utilize 'TemplateRef' and 'ViewContainerRef' to manipulate the DOM effectively within structural directives.",
      "recommendation": "Use 'TemplateRef' to reference the directive's template and 'ViewContainerRef' to insert or remove views dynamically, enabling flexible DOM manipulation."
    },
    {
      "name": "Test Structural Directives Thoroughly",
      "description": "Write comprehensive tests for structural directives to ensure they function correctly under various scenarios.",
      "recommendation": "Use Angular's testing utilities, such as 'TestBed' and 'ComponentFixture', to create a testing environment for directives and verify their behavior."
    }
  ]
}