script.
    var player = null

    $(document).ready(function(){
      $('#myModal').on('hidden.bs.modal', function(e){
        if(player && player.pause) player.pause()
      })
      
      $('.card-img-top').click(function(e){
        var video = $(this).data('video')
        var image = $(this).attr('src')

        $('#myModal').modal('show')

        if(!player){
          player = new DPlayer({
            container: document.getElementById('videoModal'),
            screenshot: true,
            video: {
              url: video,
              pic: image,
              thumbnails: image
            }
          })
        } else {
          if (play.video.currentSrc !=video) {
            player.switchVideo({
              url: video,
              pic: image,
              type: 'auto'
            })
          }  
        }
      })
    })

运行后报错：

(index):85 Uncaught TypeError: $(...).modal is not a function