See fclone in npm for a version that overcomes some of the structuredClone limitations.
If you want something for deno, I created a version for that.
https://github.com/tracker1/deno-lib
It wasn't particularly click-baity, the all caps (and when people add emojis) is unwelcome by most.
The main point was that lists that don't have an associated method of *HOW* that list was generated, or why the said items are on that list etc, or mention of what was/wasn't included is significant.
When mentioning speed/performance/fast, it often comes down to metrics. I've personally enjoyed your posts... I didn't downvote myself, I'm only speaking to why someone might have downvoted... And to me it largely comes down to "Top N for X" type lists that don't have any methodology are often deleted outright... framework/tool comparisons in particular are often low quality/listicles... I left this in as there's value to it. I can't control how others vote.
See "General Rules For Posting" in the about page.
https://www.echojs.com/about
It's hard to point to specific examples, because they get deleted. But anything that is not JavaScript related is off topic, and there are a lot of posts. Not to mention content that is in effect advertorial or otherwise heavily tied to a commercial service. There are also the listicles, which are lists of "Best 10 X" or "Top 10 X" where there is no indication of how the "best" was determined.
If it was done by a single person/account it would be easier to manage and provide feedback... the profile/account used should have an about section that includes contact email, then I could be convinced to remove the block... would have to work with Fabien to remove it, since there isn't a UI for that.
warning: side effect, the passed in array is sorted after the method is run... this may be an unintended consequence.
Should probably point this out, and clone the array first.
Many of these are effectively built ins for JS... So would be nice to see performance benchmarks of the js-sdsl library vs. using built-in options for similar patterns in practice.