JSFiddle - React, Tailwind, and code Playground

HTML

<form id="myform">
    <input type="text" value="bar" name="bar" />
    <select name="sel">
        <option>foo</option>
    </select>
    <input type="text" value="foo" name="foo" />
    <input type="password" />
</form>

JavaScript

var allEls = document.id('myform').getChildren().filter(function(el) {
    var tag = el.get("tag"), type = el.get("type");
    return tag == "select" || (tag == "input" && type == "text");
});

console.log(allEls);