Error ts2707: generic type ‘ɵɵdirectivedeclaration’ requires between 6 and 8 type arguments.

Error TS2707: Generic type ‘ɵɵdirectiveDeclaration’ requires between 6 and 8 type arguments.

This error message is related to TypeScript code and occurs when the ‘ɵɵdirectiveDeclaration’ generic type does not have the correct number of type arguments specified.

The ‘ɵɵdirectiveDeclaration’ type is part of the Angular framework and is used to define the metadata for a directive. It requires between 6 and 8 type arguments to correctly describe the directive’s properties, methods, and dependencies.

Here is an example of how to use the ‘ɵɵdirectiveDeclaration’ type correctly:

    import { Directive } from '@angular/core';

    @Directive({
      selector: '[myCustomDirective]'
    })
    export class MyCustomDirective {
      constructor(private elementRef: ElementRef) {}

      // Directive logic and methods
    }

    // Directive metadata
    export const MyCustomDirectiveDeclaration: ɵɵDirectiveDeclaration<MyCustomDirective, '[myCustomDirective]', never, {}, {}, {}> = {
      type: MyCustomDirective,
      selectors: [['', 'myCustomDirective', '']],
      factory: () => new MyCustomDirective(ɵɵdirectiveInject(ElementRef)),
      inputs: {},
      outputs: {},
      features: []
    };
  

In the example above, we define a custom directive named ‘MyCustomDirective’. We then declare a constant named ‘MyCustomDirectiveDeclaration’ of type ‘ɵɵDirectiveDeclaration’. The type argument for ‘ɵɵDirectiveDeclaration’ includes the directive class, selector, input, output, and feature properties.