l() is gone. Use \Drupal\Core\Link for full link objects, -- 链接对象and \Drupal\Core\Url for URL generation. --- 生成url
drupal_goto() is gone. Use a RedirectResponse, or the redi...
参考地址：https://www.drupal.org/docs/8/theming-drupal-8/adding-stylesheets-css-and-javascript-js-to-a-drupal-8-theme
*In Drupal8,stylesheets(css)and javasctipt(js)are loaded through the same system f...
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Tweak data -> Use Preprocess level alter
Tweak Markup -> Use Twig level customizations
涉及到大量数据，preprocessmarkup,建议用template
------可以考虑尽量用twig的函数。简单方便。
...
