Function handle

src/common/ui/index.js:131–137

(el, value, oldValue)

function vFocusFactory() {
  const handle = (el, value, oldValue) => {
    if (value === oldValue) return;
    if (value == null || value) {
      el.tabIndex = -1;
      el.focus();
    }
  };
  return {
    mounted(el, binding) {
      handle(el, binding.value, {});