title: What is W3.JS and why is W3Schools promoting it?
body: <p>I was noticing that W3Schools has a <a href="https://www.w3schools.com/w3js/default.asp" rel="nofollow noreferrer">tutorial</a> on what they're calling W3.JS, which in my opinion appears to compete with jQuery. I was having trouble finding information on it from any source other than w3Schools themselves.</p>
  
  <p>W3Schools does appear (in my opinion) to have some propensity to promote semi-abandonware. For example, <a href="https://www.w3schools.com/appml/default.asp" rel="nofollow noreferrer">AppML</a>.</p>
  
  <p>Is this library actually used anywhere? What is its history (especially its release history) and if this is actually going to be developed into something that would actually be worth considering using?</p>
  
  <p><strong>Note:</strong> I'm not seeking a library recommendation here - I do realize that that's explicitly off-topic - I'm just asking for background information on <em>this particular</em> library.</p>