framework/web/AssetBundle.php
public function registerAssetFiles($view)
    {
        $manager = $view->getAssetManager();
        foreach ($this->js as $js) {
            if (is_array($js)) {
                $file = array_shift($js);
                $options = ArrayHelper::merge($this->jsOptions, $js);
                $view->registerJsFile($manager->getAssetUrl($this, $file), $options);
            } else {
                if ($js !== null) {
                    $view->registerJsFile($manager->getAssetUrl($this, $js), $this->jsOptions);
                }
            }
        }
        foreach ($this->css as $css) {
            if (is_array($css)) {
                $file = array_shift($css);
                $options = ArrayHelper::merge($this->cssOptions, $css);
                $view->registerCssFile($manager->getAssetUrl($this, $file), $options);
            } else {
                if ($css !== null) {
                    $view->registerCssFile($manager->getAssetUrl($this, $css), $this->cssOptions);
                }
            }
        }
    }
public function registerAssetFiles($view)
    {
        $manager = $view->getAssetManager();
        foreach ($this->js as $js) {
            if (is_array($js)) {
                $file = array_shift($js);
                $options = ArrayHelper::merge($this->jsOptions, $js);
                $view->registerJsFile($manager->getAssetUrl($this, $file), $options);
            } else {
                if ($js !== null) {
                    $view->registerJsFile($manager->getAssetUrl($this, $js), $this->jsOptions);
                }
            }
        }
        foreach ($this->css as $css) {
            if (is_array($css)) {
                $file = array_shift($css);
                $options = ArrayHelper::merge($this->cssOptions, $css);
                $view->registerCssFile($manager->getAssetUrl($this, $file), $options);
            } else {
                if ($css !== null) {
                    $view->registerCssFile($manager->getAssetUrl($this, $css), $this->cssOptions);
                }
            }
        }
    }
Registers the CSS and JS files with the given view.
@param \yii\web\View $view the view that the asset files are to be registered with.