iview 后台 禁止F12

mounted() {},

beforeRouteEnter(to, from, next) {
  if(to.name==='data_home_index'){
    document.onload = function (){
      return false;
    }
    document.oncontextmenu = function (){
      return false;
    }
    document.onkeydown=function(){
      var e=window.event||arguments[0];
      if(e.keyCode==123){
        return false;
      }else if(e.ctrlKey||e.keyCode==73){
        return false;
      }
    }
  }
  next()
},
beforeRouteLeave(to, from, next) {
  if(from.name==='data_home_index'){
    document.onload = function (){
      return true;
    }
    document.oncontextmenu = function (){
      return true;
    }
    document.onkeydown=function(){
      var e=window.event||arguments[0];
      if(e.keyCode==123){
        return true;
      }else if(e.ctrlKey||e.keyCode==73){
        return true;
      }
    }
  }
  next()
},