JSFiddle - React, Tailwind, and code Playground

HTML

<input type="file" name="files[]" multiple="multiple" class="multiupload" /><input type="button" value="check" onclick="check()" />
<script>
    function check(){
        var str = '';
    $('.multiupload').map(function(){
  str += $(this).val();
});

    //$.map($('.multiupload').get(0).files, function(file) {
    //    str += file.name;
    //  });
        alert(str);
    };
</script>