bookmarklet for improved printing

headerOrphanControl.js

document.querySelectorAll('h1,h2,h3,h4,h5,h6').forEach((h) => {
  var e = h.nextElementSibling, a = [h], d
  e && a.push(e)
  while (e && /H[0-6]/.test(e.tagName)) (e = e.nextElementSibling) && a.push(e)
  if (a.length === 1) return
  d = document.createElement('div')
  d.style.display = 'inline-block'
  h.replaceWith(d)
  d.append(...a)
})

headerOrphanControl.min.js

javascript:document.querySelectorAll("h1,h2,h3,h4,h5,h6").forEach((h=>{var e=h.nextElementSibling,a=[h],d;for(e&&a.push(e);e&&/H[0-6]/.test(e.tagName);)(e=e.nextElementSibling)&&a.push(e);1!==a.length&&((d=document.createElement("div")).style.display="inline-block",h.replaceWith(d),d.append(...a))}));