解析takeWhile运算符后仍调用RXJS ANGULAR - Observable

import { of } from 'rxjs';
import { takeWhile } from 'rxjs/operators';

const users = of(
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 30 },
  { name: 'Charlie', age: 28 },
  { name: 'David', age: 35 }
);

users.pipe(
  takeWhile(user => user.age < 30)
).subscribe(user => console.log(user));

users.pipe(
  takeWhile(user => user.age < 30)
).subscribe({
  next: user => console.log(user),
  complete: () => console.log('Observable completed')
});

users.pipe(
  tap(user => console.log('Before takeWhile:', user)),
  takeWhile(user => user.age < 30),
  tap(user => console.log('After takeWhile:', user))
).subscribe({
  next: user => console.log(user),
  complete: () => console.log('Observable completed')
});