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Picture-in-Picture for HTML5 Video: A Small Window with a Simple API

Keep a video in view while you browse, read, or write code. Adapted from zhangxinxu’s original article, with practical examples from the supplied companion demo. You’re watching...
Displaying MP3 Audio Waveforms with wavesurfer.js

Turn an audio file into an interactive waveform—and give your interface a simple way to report what’s happening. By zhangxinxu , adapted from the original article. Original repr...
Building a JavaScript Formatting Checker: Regex, Useful Interfaces, and Developer Impact

Fan Group JS Basics Quiz #27: Written Q&A By zhangxinxu Adapted from the original article, with practical examples from the accompanying browser demo. Original republication not...
DOM Basics Quiz #27: A Few Things About Window Scrolling

Where to listen, which measurements to read, and why the document behaves differently from an ordinary element. By zhangxinxu · Original article Adapted for Medium, with current...

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