Wt

Using the widget set example I'm now greeted with:

Wt internal error; code: undefined, description: p.childNodes[i].classList is undefined

Or:

Wt internal error; code: undefined, description: Cannot read properties of undefined (reading 'contains')

This is due to the removal of jQuery. insertAt in Wt.js used to contain:

var i, j, il;
for (i = 0, j = 0, il = p.childNodes.length; i < il; ++i) {
  if ($(p.childNodes[i]).hasClass("wt-reparented"))
    continue;
  // ...
}

This was changed to:

for (let i = 0, j = 0, il = p.childNodes.length; i < il; ++i) {
  if (p.childNodes[i].classList.contains("wt-reparented")) {
    continue;
  }
  // ...
}

However, childNodes iterates over all nodes, not just Elements, so if e.g. a text node is encountered it has no classList member.

A simple fix could be to change the code to:

for (let i = 0, j = 0, il = p.childNodes.length; i < il; ++i) {
  if (p.childNodes[i].classList?.contains("wt-reparented")) {
    continue;
  }
  // ...
}

I'm not sure if it should maybe only iterate over Elements, though...