Get all validation errors for Angular form

Reference 1: https://gist.github.com/JohannesHoppe/e8d07d63fc345a5fdfdf4fc4989ef2e4

import { FormGroup, ValidationErrors } from '@angular/forms';

export function getFormValidationErrors(form: FormGroup) {

  const result = [];
  Object.keys(form.controls).forEach(key => {

    const controlErrors: ValidationErrors = form.get(key).errors;
    if (controlErrors) {
      Object.keys(controlErrors).forEach(keyError => {
        result.push({
          'control ': key,
          'error': keyError,
          'value': controlErrors[keyError]
        });
      });
    }
  });

  return result;
}

Reference 2:

public ngOnInit() {
    this.form.valueChanges.subscribe(data => this.onValueChanged(data));
}
public onValueChanged(data?: any): void {
    this.getFormValidationErrors();
}

getFormValidationErrors() {
    Object.keys(this.form.controls).forEach(key => {
      const controlErrors: ValidationErrors = this.form.get(key).errors;
      if (controlErrors != null) {
        Object.keys(controlErrors).forEach(keyError => {
          console.log('Key control: ' + key + ', keyError: ' + keyError + ', err value: ', controlErrors[keyError]);
        });
      }
    });
}