JSFiddle - React, Tailwind, and code Playground

JavaScript

var s="A04.3  A new Code";
$(document.body).append(
    split2(s, ' ').join('<br />')
);

function split2(str, delim) {
    var parts=str.split(delim);
    return [parts[0], parts.splice(1,parts.length).join(delim)];
}