In 2025, How to Choose the Right Video Compression Algorithm for Web Pages?The issue arose from the need to display a ~5‑minute product showcase video on a webpage. The original H.264-encoded file weighed 60 MB, with a bitrate of 1646 kbps—impractical for network delivery: not only does it inflate CDN bandwidth costs, but it also severely degrades the user experience under weak network conditions. Thus, we must compress the video using more modern codecs while ensuring b...
Why Do el-image and el-table Clash? What Is a Stacking Context?This happened during the internal development of Jinghong’s image hosting service. A freshman reported that el-image and el-table were “clashing.”Demo iframe:demoWhen I saw that the table behind was showing through the el-image preview overlay, my first reaction was to ask the student to check whether the z-index was correct—specifically whether the el-image mask overlay had a higher z-index than ...
How to Copy Text to Clipboard with JavaScript in 2025Fundamental PrinciplesIf you try searching for this article's title on a search engine, the articles you find will likely suggest using the following two APIs. I hope your search engine isn't so outdated that it's still recommending Flash-based ZeroClipboard solutions in 2025document.execCommand2012 brought us not only the supposed end of the world, but also IE 10. With IE 10's release on Septembe...
SSH to the Rescue - Running APT Updates on Internal Network Servers via SSH TunnelsThis all started when Jinghong's former technical director complained that the school's internal network servers couldn't connect to the external network, making APT installation and updates extremely difficult. He had to manually download packages from the source, along with their dependencies, and the dependencies of those dependencies... and then transfer all these packages to the server via sf...
Cudy TR3000 daed Installation GuideBackgroundNot long ago, I spotted the Cudy TR3000 router I'd been eyeing for a while at a discount price of ¥153 on JD.com. While it wasn't quite the all-time low of ¥130 (or even ¥110 with bundled deals), it was within my acceptable range. So I immediately ordered this Cudy TR3000 mini router I'd been longing for, to help ease my pre-semester anxiety (a mental condition).This router is powered by...
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