让焦点在文本最后

--

autoFocusTail () {
   let el = document.getElementById('rich-text')
   let range = document.createRange()
   let sel = window.getSelection()

   el.focus()
   range.selectNodeContents(el)
   range.collapse(false)
   sel.removeAllRanges()
   sel.addRange(range)
}

--