upload harus pdf

resources/views/backend/mahasiswa/proposal/create.blade.php

@@ -60,7 +60,7 @@
                         <label for="kode" class="col-sm-2 col-form-label">Upload Proposal</label>
                         <div class="col-sm-10">
                             @if ($errors->has('file')) <span class="text-danger">{{ $errors->first('file') }}</span> @endif
-                            <input type="file" name="file" class="form-control" id="input-file">
+                            <input type="file" name="file" class="form-control" id="input-file" accept="application/pdf">
                             <iframe id="view-pdf" width="80%" height="80%" frameborder="0" src="{{ $proposal ? 'https://statik.unesa.ac.id/simpkm/proposal/'.$proposal->rPeriode->nama.'/'.$proposal->upload_dokumen : '' }} "></iframe>
                         </div>
                     </div>
@@ -72,7 +72,7 @@
                     </div>
                 {{ Form::close() }}
                 <br>
-                <h6 class="text-danger">* PASTIKAN FILE PROPOSAL SUDAH BENAR SEBELUM DISUBMIT</h6>
+                <h6 class="text-danger">* PASTIKAN FILE PROPOSAL SUDAH BENAR DAN BERFORMAT *.PDF SEBELUM DISUBMIT</h6>
                 </div>
             </div>
         </div> <!-- end col -->