JSFiddle - React, Tailwind, and code Playground

HTML

<button id="my-button">Generate Random Names</button>

<input type="text" id="my-input" />

JavaScript

var button = document.getElementById("my-button");
var input = document.getElementById("my-input");

var names = ["Henry", "Joseph", "Mark", "Michael"];

button.addEventListener("click", function() {
    input.value = names[Math.floor(Math.random() * names.length)];
});