Angular widget (components) collection using CVA (ControlValueAccessor)
npm install @gerandon/ngx-widgetsThis library was generated with Angular CLI version 20.0.1.
ControlValueAccessors in an easier way, by implementing and extendingCore classes.Instead of creating ControlValueAccessor implementations in each of our project, this library provides already defined classes for that functionality.
Be patient with me, I'm trying to figure out what this README should really contain... :)
| File name | Class name | Description |
|---|---|---|
| base-value-accessor.ts | BaseValueAccessor | The main "core" class of the library. It contains the CVA interface implementations and handles the built-in "overridable" and redundant functionalities. |
| base.input.ts | BaseInput | Simple class that extends the BaseCVA class. It has multiple attributes inside of it, the most common ones such as: "name", "label", "appearance", etc. Extending this class in our component, makes our component to act like a custom control input. |
| base-text.input.ts | BaseTextInput | This class extends the BaseInput one. It has multiple attributes that are being used in case of "plain" text inputs, such as: "type (text or passwd)", "maxLength", etc. |
In the following example you can see a custom CVA implementation built into the library (as widget)
As you can see, instead of defining what our CVA will look like, we could use the Base implementation from the core of the library. That way (as seen) our component will have significantly less code on its TS side and we also reduced redundancy as well.
typescript
@Component({
selector: 'basic-input',
templateUrl: './basic-input.component.html',
styleUrls: ['./basic-input.component.scss'],
encapsulation: ViewEncapsulation.None,
providers: [
{provide: NG_VALUE_ACCESSOR, useExisting: forwardRef(() => BasicInputComponent), multi: true},
{provide: NG_ASYNC_VALIDATORS, useExisting: forwardRef(() => BasicInputComponent), multi: true},
],
})
export class BasicInputComponent extends BaseTextInput implements OnInit { constructor(protected injector: Injector, protected cdr: ChangeDetectorRef) {
super(cdr, injector);
}
ngOnInit() {
super.ngOnInit();
}
}
``angular2html
{{ label | translate: translateParams }}
#inputElement
#input="ngForm"
matInput
label=""
[type]="type"
[attr.disabled]="disabled"
[readonly]="disabled"
[placeholder]="placeholder | translate: translateParams"
[formControl]="control"
[maxLength]="maxLength"
[name]="name"
[required]="required"/>
{{icon}}
{{suffix}}
{{ 'COMMON.REQUIRED' | translate: translateParams }}
{{ 'ERROR.NUMERIC.MAX' | translate }}
{{ 'ERROR.NUMERIC.MIN' | translate }}
``