JSFiddle - React, Tailwind, and code Playground
HTML
<form class="f-fix" action="">
<input name="id" value="" id="id" type="text" value=""/>
</form>
JavaScript
alert($('form').attr('id'))
alert($('form')[0].getAttribute('id'))
<form class="f-fix" action="">
<input name="id" value="" id="id" type="text" value=""/>
</form>
alert($('form').attr('id'))
alert($('form')[0].getAttribute('id'))