[javascript] Validation to check if password and confirm password are same is not working

Here's my code:

function validate_form(thisform)
{
with (thisform)
  {
      if (validate_required(name,"Name must be filled out!")==false)
  {name.focus();return false;}
  if (validate_required(country," Country must be filled out!")==false)
  {country.focus();return false;}
  if (validate_required(state,"State must be filled out!")==false)
  {state.focus();return false;}
  if (validate_required(city,"City must be filled out!")==false)
  {city.focus();return false;}
  if (validate_required(contact,"Contact must be filled out!")==false)
  {contact.focus();return false;}
  if (validate_required(emailid,"Email must be filled out!")==false)
  {emailid.focus();return false;}
  if (validate_email(userid,"Email is not valid")==false)
  {userid.focus();return false;}
  if (validate_required(password,"pasword must be filed out")==false)
  {password.focus();return false;}
  if (validate_required(cpassword,"Password must be confirmed")==false)
  {cpassword.focus();return false;}

if(validate_required((password.value != cpassword.value),"Your password and confirmation password do not match.")==false) {
cpassword.focus();return false;


}

All other validations are working but not the last one. Why is that so and how to fix it?

Step 1 :

Create ts : app/_helpers/must-match.validator.ts

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

export function MustMatch(controlName: string, matchingControlName: string) {
    return (formGroup: FormGroup) => {
        const control = formGroup.controls[controlName];
        const matchingControl = formGroup.controls[matchingControlName];

        if (matchingControl.errors && !matchingControl.errors.mustMatch) { 
            return;
        } 
        if (control.value !== matchingControl.value) {
            matchingControl.setErrors({ mustMatch: true });
        } else {
            matchingControl.setErrors(null);
        }
    }
}

Step 2 :

Use in your component.ts

import { MustMatch } from '../_helpers/must-match.validator'; 

ngOnInit() {
    this.loginForm = this.formbuilder.group({
      Password: ['', [Validators.required, Validators.minLength(6)]], 
      ConfirmPassword: ['', [Validators.required]],
    }, {
      validator: MustMatch('Password', 'ConfirmPassword')
    });
  } 

Step 3 :

Use In View/Html

<input type="password" formControlName="Password" class="form-control" autofocus>
                <div *ngIf="loginForm.controls['Password'].invalid && (loginForm.controls['Password'].dirty || loginForm.controls['Password'].touched)" class="alert alert-danger">
                    <div *ngIf="loginForm.controls['Password'].errors.required">Password Required. </div> 
                    <div *ngIf="loginForm.controls['Password'].errors.minlength">Password must be at least 6 characters</div>
                </div> 


 <input type="password" formControlName="ConfirmPassword" class="form-control" >
                <div *ngIf="loginForm.controls['ConfirmPassword'].invalid && (loginForm.controls['ConfirmPassword'].dirty || loginForm.controls['ConfirmPassword'].touched)" class="alert alert-danger">
                    <div *ngIf="loginForm.controls['ConfirmPassword'].errors.required">ConfirmPassword Required. </div> 
                    <div *ngIf="loginForm.controls['ConfirmPassword'].errors.mustMatch">Your password and confirmation password do not match.</div>
                </div> 

The validate_required function seems to expect an HTML form control (e.g, text input field) as first argument, and check whether there is a value there at all. That is not what you want in this case.

Also, when you write ['password'].value, you create a new array of length one, containing the string 'password', and then read the non-existing property "value" from it, yielding the undefined value.

What you may want to try instead is:

if (password.value != cpassword.value) { cpassword.focus(); return false; }

(You also need to write the error message somehow, but I can't see from your code how that is done.).

function validate()
{
  var a=documents.forms["yourformname"]["yourpasswordfieldname"].value;
  var b=documents.forms["yourformname"]["yourconfirmpasswordfieldname"].value;
  if(!(a==b))
  {
    alert("both passwords are not matching");
    return false;
  }
  return true;
}

if((pswd.length<6 || pswd.length>12) || pswd == ""){
        document.getElementById("passwordloc").innerHTML="character should be between 6-12 characters"; status=false;

} 

else {  
    if(pswd != pswdcnf) {
        document.getElementById("passwordconfirm").innerHTML="password doesnt matched"; status=true;
    } else {
        document.getElementById("passwordconfirm").innerHTML="password  matche";
        document.getElementById("passwordloc").innerHTML = '';
    }

}