JSFiddle - React, Tailwind, and code Playground

HTML

<input type="file">
<button>some</button>

JavaScript

$("input").change(function(e) {

    for (var i = 0; i < e.originalEvent.srcElement.files.length; i++) {
        
        var file = e.originalEvent.srcElement.files[i];
        
       var btn = document.getElementsByTagName('button');
        var reader = new FileReader();
        reader.onloadend = function() {
        
        for(b in btn) {
    btn[b].style.backgroundImage = reader.result;
           }
             
        }
        reader.readAsDataURL(file);
        $("input").after(img);
    }
});