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Good Thing `document.readyState` Is Still Useful for Something After All

For a long time, document.readyState felt like one of those browser APIs that looked useful in theory but rarely earned its place in real production code. It is old. It is simpl...
Stop Using IndexedDB for Large Files. Use OPFS Instead.

Based on the article by zhangxinxu, published September 3, 2026. Original source: https://www.zhangxinxu.com/wordpress/?p=12379 For years, IndexedDB has been the default answer...
JS Methods for Detecting Whether a Browser Supports a CSS Property

CSS feature detection is most useful when you are about to rely on a property or value that may not exist everywhere. The right approach is not browser sniffing. Instead, ask th...
How to Use JavaScript to Turn a Relative URL Into an Absolute URL

In real project development, you will often receive a relative URL and need to normalize it into a full absolute URL. For example: This is useful when processing links, normaliz...
How I Pass Parameters from CSS to JavaScript

CSS is often better than JavaScript at answering environment questions. It can detect viewport size, dark mode, pointer behavior, hover support, reduced motion preferences, and...

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