Missing content for Magento 2.3 (and Magento2.2.7) out of the box with xampp

[chun sum_lai]

frontend in default mode admin page in default mode frontend in developer mode admin page in developer mode

OS: Windows7
XAMPP7.2.12 

Apache 2.4.37
MariaDB 10.1.37
PHP 7.2.12
phpMyAdmin 4.8.3
OpenSSL 1.1.1
XAMPP Control Panel 3.2.2

Besides, I have exactly same problem for installing Magento 2.2.7 in  with another apache.
OS: Windows7
XAMPP7.1.24

Apache 2.4.37
MariaDB 10.1.37
PHP 7.1.24
phpMyAdmin 4.8.3
OpenSSL 1.0.2
XAMPP Control Panel 3.2.2

I have checked the requirement and should be reacted the requirement.

https://devdocs.magento.com/guides/v2.3/install-gde/system-requirements-tech.html

Please help. Thank you.