Shorten a long phrase & add ellipsis

Shorten-the-phrase.js

($json.error.title ?? "")
   //=== consider sanitizing whitespaces
   //=== crop to intial 5 words
   .replace(
     /((\w+\s+){4}\w+)(\s.*)/,  // find 5 words: 4 words followed by whitespaces + 1 word excluding the following space
     "$1<=>$2")                 // demark the boundary with '<=>'
  .split("<=>")
  // remove empty entries (meaning there were no words to remove)
  .filter(s=>s.length)
  // replace non-empty tail with ""
  .map((s,i)=>i?"":s)
  // ellipsis will only be added if tail wasn't empty
  .join("…")
  //=== crop to initial 24 characters
  .replace(
    /(.{24})(.*)/,    // find initial 24 characters and the tail
    "$1<=>$2")        // demark the boundary with '<=>'
  .split("<=>")
  // remove empty entries (meaning there were no words to remove)
  .filter(s=>s.length)
  // replace non-empty tail with "" so that ellipsis will be added
  .map((s,i)=>i?"":s)
  // ellipsis will only be added if tail wasn't empty
  .join("…")

// The last .map().join() in each section can be replaced with `.map((s,i)=>i?"…":s)`