Hinaloe

This plugin allow your site’s comment form makes ajax — non move/reload when user (including both subscriber, normal viewer, and admins too) post comment!
Most themes supports this plugin, but if your theme’s <code>class_form</code> have not <code>comment-form</code>, this plugin non supported.
And this plugin only can use for Pure WordPress Comment form. 
so, its not able to be used with like Jetpack comment form and other original/outside comment system/form.
Feature
<ul>
<li>post comment with ajax</li>
<li>Lite — this plugin only using a little of jQuery feature to modify DOM, and very tiny js & PHP code.</li>
</ul>
Require
You have to install <a href="https://wordpress.org/plugins/rest-api/" rel="ugc">WP REST API v2</a> to use this plugin if your site is running on WP 4.4-4.6.

ajax Post Comment

Post comment form on frontend tobe ajax using WP REST API Version.2

Chris Hutchinson

ramvi

kokarn

Puts all ACF fields from posts, pages, custom post types, comments, attachments and taxonomy terms, into the WP-API output under the ‘acf’ key. Creates a new <code>/option</code> endpoint returning options (requires ACF Options Page plugin).

ACF to WP-API

Works like it says it will.  Good documentation.



Does what it says on the tin

Plugs Advanced Custom Fields (ACF) data into the WordPress JSON API (WP-API).

ajax Post Comment vs ACF to WP-API