JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input type="hidden" value="something" name="input1" />
    <input type="hidden" value="something-else" name="input2" />
</form>

<form>
    <input type="hidden" value="something" name="input3" />
    <input type="hidden" value="something-else" name="input4" />
</form>

JavaScript

var elems = [].filter.call( document.getElementsByTagName("input"), function( input ) {
    return input.value === "something";
});

console.log(elems);