JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input type="text" value="valor default" />
</form>

<form>
    <input type="text" value="valor default" />
</form>

<form>
    <input type="text" value="valor default" />
</form>

<input type="button" id="resetar" value="Resetar" onclick="resetar()" />

JavaScript

function resetar()
{
    var forms = $("form");
    
    for (var i = 0; i < forms.length; i++)
    {
        forms[i].reset();
    }
}