+ var fileName = files[0].name;
+ var validFormats = ['csv', 'txt'];
+ //Get file extension
+ var ext = fileName.substring(fileName.lastIndexOf('.') + 1).toLowerCase();
+ //Check for valid format
+ if(validFormats.indexOf(ext) == -1){
+ this.fileSelected = false;
+ }else{
+ this.fileSelected = true;
+ this.fileToRead = files[0];
+ }