JSFiddle - React, Tailwind, and code Playground

HTML

<input id="myfiles" multiple type="file">

JavaScript

var FielList = [];

var pullfiles=function(){ 
    
    var fileInput = document.querySelector("#myfiles");
    var files = fileInput.files;
    var fl=files.length;
    var i=0;
    while ( i < fl) {
        var file = files[i];
        FielList.push(file.name);
        i++;
    } 
   alert(FielList);
}

// set the input element onchange to call pullfiles
document.querySelector("#myfiles").onchange=pullfiles;