JSFiddle - React, Tailwind, and code Playground

HTML

<a class='gotothis' href='http://www.dacorum.cats.org.uk/uploads/images/pages/cats_01210.jpg'>this Image</a>
<button type="button">Click Me!</button>
<iframe id="frameimg" src="" width="800" height="762">
</iframe>

JavaScript

$(window).load(function() {
    $('button').click( function(event) {
        var clicked = $(this);
        window.setTimeout(function() {
            $("#frameimg").attr("src", $(".gotothis").attr("href"));
        }, 1000);
    });
});