Class yii\bootstrap5\NavBar

                public function init(): void
{
    parent::init();
    if (!isset($this->options['class']) || empty($this->options['class'])) {
        Html::addCssClass($this->options, [
            'widget' => 'navbar',
            'toggle' => 'navbar-expand-lg',
            'navbar-light',
            'bg-light',
        ]);
    } else {
        Html::addCssClass($this->options, [
            'widget' => 'navbar',
        ]);
    }
    $navOptions = $this->options;
    $navTag = ArrayHelper::remove($navOptions, 'tag', 'nav');
    $brand = '';
    if (!isset($this->innerContainerOptions['class'])) {
        Html::addCssClass($this->innerContainerOptions, [
            'panel' => 'container',
        ]);
    }
    if ($this->collapseOptions !== false && !isset($this->collapseOptions['id'])) {
        $this->collapseOptions['id'] = "{$this->options['id']}-collapse";
    } elseif ($this->offcanvasOptions !== false && !isset($this->offcanvasOptions['id'])) {
        $this->offcanvasOptions['id'] = "{$this->options['id']}-offcanvas";
    }
    if ($this->brandImage !== false) {
        $this->brandLabel = Html::img($this->brandImage, $this->brandImageOptions);
    }
    if ($this->brandLabel !== false) {
        Html::addCssClass($this->brandOptions, [
            'widget' => 'navbar-brand',
        ]);
        if ($this->brandUrl === null) {
            $brand = Html::tag('span', $this->brandLabel, $this->brandOptions);
        } else {
            $brand = Html::a(
                $this->brandLabel,
                $this->brandUrl === false ? Yii::$app->homeUrl : $this->brandUrl,
                $this->brandOptions,
            );
        }
    }
    ob_start();
    echo Html::beginTag($navTag, $navOptions) . "\n";
    if ($this->renderInnerContainer) {
        echo Html::beginTag('div', $this->innerContainerOptions) . "\n";
    }
    echo $brand . "\n";
    echo $this->renderToggleButton() . "\n";
    if ($this->collapseOptions !== false) {
        Html::addCssClass($this->collapseOptions, [
            'collapse' => 'collapse',
            'widget' => 'navbar-collapse',
        ]);
        $collapseOptions = $this->collapseOptions;
        $collapseTag = ArrayHelper::remove($collapseOptions, 'tag', 'div');
        echo Html::beginTag($collapseTag, $collapseOptions) . "\n";
    } elseif ($this->offcanvasOptions !== false) {
        Offcanvas::begin($this->offcanvasOptions);
    }
}

            

                protected function renderToggleButton(): string
{
    if ($this->collapseOptions === false && $this->offcanvasOptions === false) {
        return '';
    }
    $options = $this->togglerOptions;
    Html::addCssClass($options, [
        'widget' => 'navbar-toggler',
    ]);
    if ($this->offcanvasOptions !== false) {
        $bsData = [
            'bs-toggle' => 'offcanvas',
            'bs-target' => '#' . $this->offcanvasOptions['id'],
        ];
        $aria = $this->offcanvasOptions['id'];
    } elseif ($this->collapseOptions !== false) {
        $bsData = [
            'bs-toggle' => 'collapse',
            'bs-target' => '#' . $this->collapseOptions['id'],
        ];
        $aria = $this->collapseOptions['id'];
    }
    return Html::button(
        $this->togglerContent,
        ArrayHelper::merge($options, [
            'type' => 'button',
            'data' => $bsData,
            'aria' => [
                'controls' => $aria,
                'expanded' => 'false',
                'label' => $this->screenReaderToggleText ?: Yii::t('yii/bootstrap5', 'Toggle navigation'),
            ],
        ]),
    );
}

            

                public function run(): string
{
    if ($this->collapseOptions !== false) {
        $tag = ArrayHelper::remove($this->collapseOptions, 'tag', 'div');
        echo Html::endTag($tag) . "\n";
    } elseif ($this->offcanvasOptions !== false) {
        Offcanvas::end();
    }
    $content = ob_get_clean();
    if ($this->renderInnerContainer) {
        $content .= Html::endTag('div') . "\n";
    }
    $tag = ArrayHelper::remove($this->options, 'tag', 'nav');
    $content .= Html::endTag($tag);
    BootstrapPluginAsset::register($this->getView());
    return $content;
}

            

                public function setContainerOptions(array $collapseOptions): void
{
    $this->collapseOptions = $collapseOptions;
}