JSFiddle - React, Tailwind, and code Playground

HTML

<input class='rdo' type="radio" id='rdo1' /><label for="rdo1">Radio 1</label>
<input class='rdo' type="radio" id='rdo2' /><label for="rdo2">Radio 2</label>
<input class='rdo' type="radio" id='rdo3' /><label for="rdo3">Radio 3</label>

<img id='testImg' src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQ8Zwmk3K2Nu0ZpxvE0SrQOOKno_ssbEsdX7MuA_HRP0AovfpN06g" />

JavaScript

window.onload = function(){
    document.getElementById('testImg').onclick = function(){
        var radios = document.getElementsByClassName('rdo');
        for(var i = 0; i < radios.length; i++){
            radios[i].checked = true;    
        }
    }
};