framework/widgets/ActiveField.php
public function passwordInput($options = [])
    {
        $options = array_merge($this->inputOptions, $options);

        if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
            $this->addErrorClassIfNeeded($options);
        }

        $this->addAriaAttributes($options);
        $this->adjustLabelFor($options);
        $this->parts['{input}'] = Html::activePasswordInput($this->model, $this->attribute, $options);

        return $this;
    }
public function passwordInput($options = [])
    {
        $options = array_merge($this->inputOptions, $options);

        if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
            $this->addErrorClassIfNeeded($options);
        }

        $this->addAriaAttributes($options);
        $this->adjustLabelFor($options);
        $this->parts['{input}'] = Html::activePasswordInput($this->model, $this->attribute, $options);

        return $this;
    }
Renders a password input.
This method will generate the `name` and `value` tag attributes automatically for the model attribute
unless they are explicitly specified in `$options`.
@param array $options the tag options in terms of name-value pairs. These will be rendered as
the attributes of the resulting tag. The values will be HTML-encoded using [[Html::encode()]].

If you set a custom `id` for the input element, you may need to adjust the [[$selectors]] accordingly.

@return $this the field object itself.