Limiting the number of files that can be uploaded using ng-file-upload in Angular.js is a simple process

Can someone help me with limiting file selection using ng-file-upload in Angular.js? Here is my code:

<input
  type="file"
  class="filestyle form-control"
  data-size="lg"
  name="bannerimage"
  id="bannerimage"
  ng-model="file"
  ngf-pattern="'image/*'"
  accept="image/*"
  ngf-max-size="2MB"
  ngf-min-height="100"
  ngf-resize="{width: 100, height: 100}"
  custom-on-change="uploadFile"
  required="required"
  ngf-select="onFileSelect($file);"
  ngf-multiple="true"
>

I have a scenario where multiple files can be selected, but I want to limit the selection to only 5 files. After that, the user should not be able to select any more files. Can anyone assist me with this requirement?

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