Angular FormGroup -自动将另一个字段的值除以100

import { Component } from '@angular/core';
import { FormGroup, FormControl, Validators } from '@angular/forms';

@Component({
  selector: 'app-my-form',
  template: `
    <form [formGroup]="myForm">
      <input type="number" formControlName="field1">
      <input type="number" formControlName="field2">
    </form>
  `
})
export class MyFormComponent {
  myForm: FormGroup;

  constructor() {
    this.myForm = new FormGroup({
      field1: new FormControl('', Validators.required),
      field2: new FormControl('', Validators.required)
    }, { validators: this.customValidator });
  }

  customValidator(formGroup: FormGroup) {
    const field1Value = formGroup.get('field1').value;
    const field2Value = formGroup.get('field2').value;

    if (field1Value && field2Value) {
      const calculatedValue = field1Value / 100;
      if (calculatedValue !== field2Value) {
        return { mismatch: true };
      }
    }

    return null;
  }
}