Rails:如何在trix中添加链接时显示Web预览

gem 'trix'
gem 'trix_attachments'

<%= form.rich_text_area :content, id: 'trix-editor' %>
<%= form.hidden_field :content, id: 'trix-editor-content' %>

document.addEventListener('trix-attachment-add', function(event) {
  if (event.attachment.file) {
    var reader = new FileReader();
    reader.onload = function(event) {
      var imageUrl = event.target.result;
      var href = prompt('Enter the URL:');
      var attachment = new Trix.Attachment({
        content: `<a href="${href}" target="_blank"><img src="${imageUrl}" /></a>`
      });
      event.attachment.setAttributes(attachment);
    };
    reader.readAsDataURL(event.attachment.file);
  }
});