protected function addAdditionalHeaderData()
    {
        /** @var PageRenderer $pageRenderer */
        $pageRenderer = GeneralUtility::makeInstance(PageRenderer::class);
        $pageRenderer->loadJquery();
        $publicResourcesPath = $this->extensionPath . 'Resources/Public/';
        $pageRenderer->addJsFile($publicResourcesPath . 'JavaScript/BackEnd.js', 'text/javascript', false);
        $pageRenderer->addCssFile($publicResourcesPath . 'CSS/BackEnd.css', 'stylesheet', 'all', '', false);
    }
protected function addAdditionalHeaderData()
    {
        /** @var PageRenderer $pageRenderer */
        $pageRenderer = GeneralUtility::makeInstance(PageRenderer::class);
        $pageRenderer->loadJquery();
        $publicResourcesPath = $this->extensionPath . 'Resources/Public/';
        $pageRenderer->addJsFile($publicResourcesPath . 'JavaScript/BackEnd.js', 'text/javascript', false);
        $pageRenderer->addCssFile($publicResourcesPath . 'CSS/BackEnd.css', 'stylesheet', 'all', '', false);
    }
protected function addAdditionalHeaderData ( ) { /** @var PageRenderer $pageRenderer */ $ pageRenderer = GeneralUtility :: makeInstance ( PageRenderer :: class ) ; $ pageRenderer -> loadJquery ( ) ; $ publicResourcesPath = $ this -> extensionPath . 'Resources/Public/' ; $ pageRenderer -> addJsFile ( $ publicResourcesPath . 'JavaScript/BackEnd.js' , 'text/javascript' , false ) ; $ pageRenderer -> addCssFile ( $ publicResourcesPath . 'CSS/BackEnd.css' , 'stylesheet' , 'all' , '' , false ) ; }
Adds some JavaScript and CSS stuff to header data.

@return void
Adds some JavaScript and CSS stuff to header data .