How to embed independent html code in wordpress post?

Question

css

You need to insert an independent html code into a post in Wordpress. And that for it it was possible to register styles. But the styles of the main site should not affect it.
For example:
You need to insert the layout of the feedback form into the post, as an example.
Thank you.

Answer 1

For example:

var context = $("#integrate")[0].contentWindow.document;
$("body", context).html("heloo!")

Paste anywhere on the site

<script>$("isolate").each(function ()
{
var content, context;
content = $(this).html();
$(this).html("<iframe style=\"border:none;\"></iframe>");
context = $("iframe", this)[0].contentWindow.document;
$("body", context).html(content);
})</script>

And to isolate code from other styles use
<isolate>your content</isolate>