我想显示本地文件夹中的图像，但图像未显示

问：

这是我想要显示图像的元素

<div id="policyFilesPreviewContainer"></div>

这是我的jQuery代码

var policyFilesPreview = $('<div>');

$.each(data[0].policy_files, function(policyId, policyFile) {
  var policyRequirementDiv = $('<div>');
  policyRequirementDiv.append('<h3>Policy Requirement ID: ' + policyFile.policy_requirement_id + '</h3>');

  var filePreviewsContainer = $('<div>');

  policyFile.file_names.forEach(function(fileName) {
    // Create an <img> element for each image
    var filePreview = $('<img>', {
      src: 'assets/', // Replace with actual image path
      alt: fileName
    }).css({
      width: '150px', // Adjust image width as needed
      height: 'auto'
    });

    // Append the image to the container
    filePreviewsContainer.append(filePreview);
  });

  // Append the container to the policy requirement div
  policyRequirementDiv.append(filePreviewsContainer);

  // Append the policy requirement div to the main preview container
  policyFilesPreview.append(policyRequirementDiv);
});

// Clear and append the policyFilesPreview into the designated container
$('#policyFilesPreviewContainer').empty().append(policyFilesPreview);

尝试了很多方法，希望有人可以帮助我解决这个问题