JSFiddle - React, Tailwind, and code Playground

by Neal

HTML

<input type="file" name="group_documents_file" id="group_documents_file" 
                                                  class="group-documents-file" />

JavaScript

$('#group_documents_file').change(function(){
    var value = this.value;
    val = value.split("\\");
    var file = (val[val.length - 1]).split('.');
    var ext = file[file.length - 1];
    alert(ext);
})