open a popup window in center

popup.js

export function popupUrlCenterWindow(url, title, w, h) {
  const dualScreenLeft =
    window.screenLeft != undefined ? window.screenLeft : window.screenX
  const dualScreenTop =
    window.screenTop != undefined ? window.screenTop : window.screenY

  const width = window.innerWidth
    ? window.innerWidth
    : document.documentElement.clientWidth
      ? document.documentElement.clientWidth
      : screen.width
  const height = window.innerHeight
    ? window.innerHeight
    : document.documentElement.clientHeight
      ? document.documentElement.clientHeight
      : screen.height

  const left = width / 2 - w / 2 + dualScreenLeft
  const top = height / 2 - h / 2 + dualScreenTop
  const newWindow = window.open(
    url,
    title,
    'scrollbars=yes, width=' +
      w +
      ', height=' +
      h +
      ', top=' +
      top +
      ', left=' +
      left
  )

  // Puts focus on the newWindow
  if (window.focus) {
    newWindow.focus()
  }
}