TypeError: Converting circular structure to JSON when trying to POST request

Question

I am getting the error in the title and here is the full stack trace, i am not sure what it is, any insight is welcomed!

browser_adapter.js:84 EXCEPTION: Error i         


        

Answer 1

use form.value as the following code:

      onSubmit(form: NgForm) {
        this.userService.login(form.value).subscribe(
          (res: any) => {
            localStorage.setItem('token', res.token);
            this.router.navigateByUrl('/home');
          },
          error => {
            if (error.status == 400)
              this.tostarService.error('Invalid Username or password!', 'Authentication Failed');
            else
              console.log(error);

          }
        );
      }