mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
a8569e3802
This commit exports existing utility functions to check for control instances:
isFormControl, isFormGroup, isFormRecord, isFormArray
Those are useful when implementing validators that use the specifics of one of those control types.
To narrow down the type to what it actually is, we can now use the util functions in validators:
```
export const myArrayValidator: ValidatorFn = (control) => {
if (!isFormArray(control)) { return null; }
// now you can use FormArray-specific members, e.g.:
if (control.controls.every(c => !!c.value) {
return { myerror: true }
} else { return null; }
}
```
PR Close #47718
|
||
|---|---|---|
| .. | ||
| src | ||
| test | ||
| BUILD.bazel | ||
| index.ts | ||
| package.json | ||
| PACKAGE.md | ||
| public_api.ts | ||