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Proxy Is for Proxies. What Is `Reflect` For?

JavaScript’s Proxy feels immediately useful: it lets you intercept property reads, writes, function calls, construction, and more. Reflect , at first glance, feels less dramatic...
Using Deprecated HTML `rel="import"` to Build Static Page Includes

HTML Imports are dead. No modern browser supports them as an official platform feature anymore, and that sounds like bad news. But for static HTML demos, documentation pages, an...
ogv.js: Making WebM Play on iPhone with JavaScript Decoding

Web video compatibility is usually simple until it is not. Most of the time, you reach for the native element, encode an MP4, and move on. But some real-world mobile browsers co...
When Should JavaScript `WeakMap` Be Used?

Most JavaScript applications can run perfectly well without WeakMap . That is part of what makes WeakMap easy to ignore. It is not a daily-use feature like Array.map() , Promise...
File Uploads Can Be Triggered Without Using an `input type="file"`

For a long time, file uploads on the web have meant one thing: an element with type="file" . It is simple, reliable, and still very capable. You can use accept to limit selectab...

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