For my technology watch, I use 2 websites that include all the latest news on web development and web design, as well as the codepen newsletter:
It is a website on which we can find many ideas on navigation menus, experiments, web components (buttons, etc.), but also tutorials, plugins and a table summarizing all CSS properties.
This is a site on which we can find many ideas on navigation menus, experiments, web components (buttons, etc.). They also made a nucleo cell library that works like fontawesome.
It's a website where you can create code, test it and share it with the web community. It sends a newsletter every week summarizing the best thoughts, some tutorials and radio codepen.