Theme development

I have custom block its working normally as expected but while i am doing cache-rebuild if one of the users request that page ( which contains the block ) block dissepear , block have custom twig template which not rendered in this case i need help i open for any solution 

Thanks.

in your theme's template.php add following code

I've several times Installed Drupal 8.6.1 on the server, but after installing no themes were shown(both Bartik, seven for control panel).

what should I do, How can I solve this problem?

• server(one.com,php7)
• http://brotherswebsite.com/

Here are the four easiest ways I’ve found to show dates via Twig inside of a node template.

They all result in the same output.

Use the field’s format settings; include wrappers

This is the only example that includes wrappers. The rest output just the date.

Use the field’s format settings

I am providing below code for creating link to downloadable files and make them download on your web application:

I assume the file url has been set in url that can be encoded such as:

https://www.drupal.org?destination=file-url

/**
 * Implements hook_preprocess_HOOK().
 */
function vf_theme_preprocess_page(&$variables) {