fix

app/static/js/app.js

@@ -35,7 +35,7 @@ document.addEventListener('DOMContentLoaded', function(){
             translationType: "text",
             inputFile: false,
             loadingFileTranslation: false,
-            translatedFileUrl: "",
+            translatedFileUrl: false,
         },
         mounted: function(){
             var self = this;
@@ -318,7 +318,7 @@ document.addEventListener('DOMContentLoaded', function(){
             removeFile: function(e) {
               e.preventDefault()
               this.inputFile = false;
-              this.translatedFileUrl = "";
+              this.translatedFileUrl = false;
               this.loadingFileTranslation = false;
             },
             translateFile: function(e) {

app/templates/index.html

@@ -203,8 +203,8 @@
                                             </div>
                                         </div>
                                     </div>
-                                    <button @click="translateFile" v-if="translatedFileUrl === '' && loadingFileTranslation === false" class="btn">Translate</button>
-                                    <a v-if="translatedFileUrl !== ''" :href="translatedFileUrl" class="btn">Download</a>
+                                    <button @click="translateFile" v-if="translatedFileUrl === false && loadingFileTranslation === false" class="btn">Translate</button>
+                                    <a v-if="translatedFileUrl !== false" :href="translatedFileUrl" class="btn">Download</a>
                                     <div class="progress" v-if="loadingFileTranslation">
                                         <div class="indeterminate"></div>
                                     </div>