I have a simple ajax form on a blog post and I want to access the blog post data from within my ajax functions. Does anyone know how?

You can just use the twig variables inside of your javascript. Something like so:

Assuming you have the blogPost loaded up thru twig as blogPost: In your form you could just do:

<form>
    <button type="submit" data-request="yourEventHandler" data-request-data="postId: '{{ blogPost.id }}'">Make AJAX request</button>
</form>

This will send thru your blogPost.id as post data to your AJAX handler. Key name in post data would be 'postId' in this example.

Perfect, thanks :)