toggle columns for http://www.stefankrause.net/js-frameworks-benchmark2/webdriver-java/table.html

toggleColumns.js

const getIndex = (th) => Array.from(th.parentElement.children).indexOf(th)
const getChildren = (i) => Array.from(document.querySelectorAll(`td:nth-child(${i + 1})`))
const setHiddenStyle = (node) => {
  node.style.width = '1px'
  node.style.overflow = 'hidden'
  node.style.overflowWrap = 'normal'
}
const toggleHidden = (node) => {
  if (node.style.length) {
    node.style = {}
  } else {
    setHiddenStyle(node)
  }
}
const handleClick = (e) => {
  const i = getIndex(e.currentTarget)
  getChildren(i).concat([e.currentTarget]).forEach(toggleHidden)
}
document.querySelectorAll('th').forEach(th => {
  th.onclick = handleClick;
})