AbstractControlDirective
Base class for control directives.
abstract class AbstractControlDirective {
abstract control: AbstractControl | null
value: any
valid: boolean | null
invalid: boolean | null
pending: boolean | null
disabled: boolean | null
enabled: boolean | null
errors: ValidationErrors | null
pristine: boolean | null
dirty: boolean | null
touched: boolean | null
status: string | null
untouched: boolean | null
statusChanges: Observable<any> | null
valueChanges: Observable<any> | null
path: string[] | null
reset(value: any = undefined): void
hasError(errorCode: string, path?: string | (string | number)[]): boolean
getError(errorCode: string, path?: string | (string | number)[]): any
}
说明
This class is only used internally in the ReactiveFormsModule and the FormsModule.
属性
| 属性 | 说明 |
|---|---|
abstract control: AbstractControl | null | 只读 A reference to the underlying control. |
value: any | 只读 Reports the value of the control if it is present, otherwise null. |
valid: boolean | null | 只读 Reports whether the control is valid. A control is considered valid if no validation errors exist with the current value. If the control is not present, null is returned. |
invalid: boolean | null | 只读 Reports whether the control is invalid, meaning that an error exists in the input value. If the control is not present, null is returned. |
pending: boolean | null | 只读 Reports whether a control is pending, meaning that that async validation is occurring and errors are not yet available for the input value. If the control is not present, null is returned. |
disabled: boolean | null | 只读 Reports whether the control is disabled, meaning that the control is disabled in the UI and is exempt from validation checks and excluded from aggregate values of ancestor controls. If the control is not present, null is returned. |
enabled: boolean | null | 只读 Reports whether the control is enabled, meaning that the control is included in ancestor calculations of validity or value. If the control is not present, null is returned. |
errors: ValidationErrors | null | 只读 Reports the control's validation errors. If the control is not present, null is returned. |
pristine: boolean | null | 只读 Reports whether the control is pristine, meaning that the user has not yet changed the value in the UI. If the control is not present, null is returned. |
dirty: boolean | null | 只读 Reports whether the control is dirty, meaning that the user has changed the value in the UI. If the control is not present, null is returned. |
touched: boolean | null | 只读 Reports whether the control is touched, meaning that the user has triggered a |
status: string | null | 只读 Reports the validation status of the control. Possible values include: 'VALID', 'INVALID', 'DISABLED', and 'PENDING'. If the control is not present, null is returned. |
untouched: boolean | null | 只读 Reports whether the control is untouched, meaning that the user has not yet triggered a |
statusChanges: Observable<any> | null | 只读 Returns a multicasting observable that emits a validation status whenever it is calculated for the control. If the control is not present, null is returned. |
valueChanges: Observable<any> | null | 只读 Returns a multicasting observable of value changes for the control that emits every time the value of the control changes in the UI or programmatically. If the control is not present, null is returned. |
path: string[] | null | 只读 Returns an array that represents the path from the top-level form to this control. Each index is the string name of the control on that level. |
方法
Resets the control with the provided value if the control is present. |
Reports whether the control with the given path has the error specified. | ||||||
参数
返回值
If the control is not present, false is returned. | ||||||
使用说明For example, for the following
The path to the 'street' control from the root form would be 'address' -> 'street'. It can be provided to this method in one of two formats:
If no path is given, this method checks for the error on the current control. |
Reports error data for the control with the given path. | ||||||
参数
返回值
| ||||||
使用说明For example, for the following
The path to the 'street' control from the root form would be 'address' -> 'street'. It can be provided to this method in one of two formats:
|
