onBeforeRouteLeave 组件内监听页面离开的钩子

onBeforeRouteLeave((to, from, next) => {
  ElMessageBox.confirm(
    '数据未保存，是否要离开当前页面?',
    '提示',
      confirmButtonText: '离开',
      cancelButtonText: '前往保存',
      type: 'warning',
    .then(() => {
      next()
    .catch((e) => {
      console.log(e,'error')