JSFiddle - React, Tailwind, and code Playground

HTML

<input type="hidden" name="page_id" id="page_id" />
<input type="hidden" name="page_name" id="page_name" />

JavaScript

function insertIntoHiddenField(pageID,pageName)
{
    $('input[name="page_id"]').val(pageID);
    $('input[name=page_name]').val(pageName);
}

insertIntoHiddenField("1", "index");
console.log($('input[name="page_id"]').val());
console.log($('input[name="page_name"]').val());