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Scope: Nishi’s own index (our crawl + Common Crawl) — not the whole live web. Some sites block all automated crawlers (anti-bot walls), so their pages may be absent here even though we never filter lawful content.
Freshness: no result on this page carries a fetch time yet (indexed before the fetch epoch was stored beside the doc)
https://developer.mozilla.org/en-US/blog/using-the-page-visibility-api/
This API exposes a way to determine a document's visibility state so you can check if a web page is "visible" or "hidden
https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Advanced_styling_effects
The second length value is the vertical offset — the distance downwards that the shadow is offset from the original box (or upwards, if the value is negative)
https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Images_media_forms
Understanding what is and isn't possible can save some frustration, and this lesson will highlight some of the main things that you need to know
https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Handling_conflicts
Learning outcomes:
Understand how rules can conflict in CSS
https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Debugging_JavaScript
Learning outcomes:
Using browser developer tools to inspect the JavaScript running on your page and see what errors it is generating
https://developer.mozilla.org/en-US/docs/Web/CSS/Guides
CSS custom functions and mixins
The CSS custom functions and mixins module allows developers to create reusable blocks of CSS code that can accept arguments, contain complex logic (defined using features such as CSS if() functions and @media at-rules), and return values based on that logic
https://developer.mozilla.org/zh-TW/docs/Web/Accessibility
Keyboard-navigable JavaScript widgets
Until now, web
developers who want to make their styled <div> and <span> based widgets have lacked the proper techniques