У вашего броузера проблема в совместимости с HTML5
This video shows the process of porting a drupal 7 theme to drupal8. the theme which is used in this video is the Danland theme. Also i apologize for the videosoft logo in the middle of video. Danland can be downloaded at https://www.drupal.org/project/danland
The post which was used in aid of creating the .libraries file is at https://www.drupal.org/docs/8/theming-drupal-8/adding-stylesheets-css-and-javascript-js-to-a-drupal-8-theme
The automatic converter for the template files can be found at https://www.drupal.org/project/twigify
To manually convert the templates to the drupal 8 formay use:
1) https://www.drupal.org/docs/8/theming/twig/comparison-of-phptemplate-and-twig-theming-paradigms
2) https://www.drupal.org/docs/8/theming/drupal-twig-conversion-instructions-tplphp-to-htmltwig
Information on changes to the .theme file for atributes and how to make it is at:
https://www.drupal.org/docs/8/theming-drupal-8/modifying-attributes-in-a-theme-file
My blog can be found at: https://progsmart.wordpress.com/2016/12/17/how-to-port-drupal-7-theme-to-drupal-8/
Video done for a task in Google Code-In (GCI) 2016. Google Code-in is a contest for pre-university students (e.g., high school and secondary school students ages 13-17) with the goal of encouraging young people to participate in open source...
more info about google code in at https://developers.google.com/open-so...