Make my static website become like a mobile app via Progressive Web App (PWA).

GitHub Pages set Content-Type according to the name of symlink, not the file name that the symlink references to.

Support multiple languages in your (web) applications, by GNU gettext tools, which include xgettext, msginit, msgmerge, and msgfmt.

Responsive top navigation bar (navbar) used in this website.

A simple custom responsive grid layout exmaple without CSS frameworks.

Toggle element (usually div) with pure CSS only (no JavaScript). Suitable for dropdown/menu application.

Let website users upload multiple files to Google App Engine (Python) servers.