Ruby on Rails，当我查看 console.log 时未定义

如何解决Ruby on Rails，当我查看 console.log 时未定义

$(function(){
  var $activeSlide = $('#slides .slide:first-child');
  //show first slides;
  // $activeSlide.addClass('showing');

  $('#decline').on('click',function(){
    console.log('decline')
    goToSlide('decline');
  });

  $('#approve').on('click',function(){
    var user_id = $activeSlide.data('id');

    console.log(user_id);
    
    $.ajax({
      url: "/approve/" + user_id,method: 'post',dataType: "ajax"
    })
    goToSlide('approve');
  });

   function goToSlide(action){
     $activeSlide.removeClass('showing');
     $activeSlide = $activeSlide.next('.slide');

    if(action == 'approve'){
      console.log(action);
    } else {
      console.log(action);

    }

    $activeSlide.addClass('showing');
    //  slides[currentSlide] = 'slide';
      //currentSlide = (n+slides.length)%slides.length;
      //slides[currentSlide].className = 'slide showing';
    }


    });

使用这个火种克隆教程 https://www.youtube.com/watch?v=ibRVysxvOdU&t=116s

[Log] 未定义（application-72a9ee64d4b552e48811.js，第 140 行） [日志] 批准 (application-72a9ee64d4b552e48811.js,line 152)