PSDCovers

Developed internally for our Adjustly theme, this plugin allows authors to link 2 html elements together as trigger and target. When the trigger is clicked the target will immediately expand to reveal its content.
<h4>Try the Demo</h4>
If you’re interested in seeing what a default installation of Adjustly Collapse has to offer, have a look at some samples on our site.
<a href="http://www.psdcovers.com/adjustly-collapse/" rel="nofollow ugc">http://www.psdcovers.com/adjustly-collapse/</a>
<h4>Usage</h4>
The basic structure without any CSS bells and whistles looks like this:
<pre><code><a class="aj-collapse" rel="myslidingcontent">trigger</a>
<div class="aj-hidden" id="myslidingcontent">target: this content is hidden by default</div>
</code></pre>
In the example above, the trigger is an href element and the target is a div element. Note that the target can be any element you choose.
<h4>rel=”[id]”</h4>
Each trigger and target pair must contain a common label so that the trigger knows which target to expand or collapse. The trigger rel tag must be the same name as the target’s id tag. If you plan on having multiple collapsible elements in a page, post or theme then you will need to ensure that the rel and id tags are always unique for each trigger/target combo.
<h4>Class Names</h4>
<ol>
<li>The trigger must always have the following class name: class=”aj-collapse”</li>
<li>The target can have either of 2 classes: class=”aj-hidden” will make the target collapsed by default while class=”aj-visible” will display the content normally but allow the viewer to collapse it.</li>
</ol>
<h4>Notes</h4>
The trigger and target do not have to be next to each other. The target can be at the opposite end of the article or you can place it within the trigger. Theme developers can use it to make widgets collapsible.

Adjustly Collapse

Developed internally for our Adjustly theme, this plugin allows authors to link 2 html elements together as trigger and target.

KestutisIT

Marius

First – differently than any other similar plugin, this plugin is based on MIT license, which is a holly-grail for premium theme authors on i.e. ThemeForest or similar marketplaces. 
Differently to standard GPLv2 license you are not required to open-source your theme and you CAN include this plugin into your premium websites bundle packs. 
I do say here bundle packs, because you should never have an F.A.Q. to be a part of your theme, because that would be a bad idea – you need to leave your customers a flexibility for the future scale: 
What if your customers will decide later go with some kind of fancy knowledge base system like in Change.org <code>/help/</code> part or Envato.com <code>Support</code> part – if your customer will grow that big, he won’t need to have F.A.Q. plugin anymore on their website, he will want to replace it with that fancy knowledge base system. 
So my advise is to include this plugin in your bundle pack’s <code>/Optional Plugins/</code> folder, so that you can tell about in the installation instructions, but make it fully independent from your theme.
Second – this plugin is fully MVC + Templates based. This means that it’s code is not related at all to it’s UI, and that allows you easily to override it’s UI templates and Assets (CSS, JS, Images) by your theme very easily (and there is detailed step-by-step instructions given how to do that). 
This means that you making a theme to be what the theme has to be – a UI part of your website, nothing more.
Third – it is much more secure than any other plugin’s on the market. It is based on top-end S.O.L.I.D. coding principle with input data validation with data-patterns, output escaping.
Fourth – this plugin is scalable – it’s source code is fully object-oriented, clean & logical, based on MVC architectural pattern with templates engine, compliant with strict PSR-2 coding standard and PSR-4 autoloaders, and easy to understand how to add new features on your own.
Fifth – this plugin works well with big databases & high-traffic websites – it is created on optimal BCNF database structure and was tested on live website with 1M customers database and 500,000 active daily views.
Sixth – it does support official WordPress multisite as network-enabled plugin, as well as it does have support WPML string translation. 
At this point, if you need more than one language, I’d strongly advise to go with official WordPress multisite setup, because it is free, it is official (so you will never need to worry about the future support), and, most important – WordPress multisite is much more suitable for websites that needs to scale. You don’t want to have that additional translation bottle-neck code layer to be processed via database.
Seventh – it has nice user experience – it’s has a default design, it does allow you to have more than one F.A.Q. item open at the same time – so it don’t have that annoying <code>accordion</code> feature.
But the most important is that this plugin is and always be ads-free. I personally really hate these freemium, ads-full or tracking plugins which makes majority of the plugins on w.org plugins directory (and, actually, many of premium marketplaces). So this is the key features we always maintain: 
1. Never track your data (nor even by putting some kind of GDPR-compliance agreement checkbox, like <code>Error Log Monitor</code> plugin), 
2. Never make it pseudo-ads-full (even such a big plugins like <code>WooCommerce</code> or <code>Contact Form 7</code> has nearly 80% of their home screen or 20% of their main buttons about <code>how to install \ buy other plugins</code> 
– this is a really ugly behavior of pushing-more and going to Facebook-like business, where you get like drug-addicted to company products).
The goal of this plugin is to full-fill the needs of website-starter, that needs a great tool which can last him for many years until it will grow that big so he would grow-out current plugins and would need some kind of different plugins.
And, I believe, that many other developers had the same issue when tried to create their first premium theme or set-up a website for their client. Starting with the issues with license type to the moment when F.A.Q. is <code>hardcoded</code> into theme code.
So I wanted to help all these developers to save their time, and I’m releasing this plugin for you to simplify your work. And I’m releasing it under MIT license, which allows you to use this plugin your website bundle without any restrictions for both – free and commercial use.
Plus – I’m giving a promise to you, that this plugin is and will always be 100% free, without any ads, ‘Subscribe’, ‘Follow us’, ‘Check our page’, ‘Get Pro Version’ or similar links.
Finally – the code is poetry – the better is the web, the happier is the world.
<h3>Live Demo</h3>
<a href="https://nativerental.com/cars/faq/" title="Expandable FAQ (Live Demo)" rel="nofollow ugc">Expandable FAQ (Live Demo)</a>
<h3>GitHub Repository (for those, who want to contribute via “Pull Requests”)</h3>
<a href="https://github.com/SolidMVC/ExpandableFAQ" title="ExpandableFAQ @GitHub" rel="nofollow ugc">https://github.com/SolidMVC/ExpandableFAQ</a>

Expandable FAQ

The best FAQ plugin on the market that has absolutely NO ADS. I love to use it on my ThemeForest Envato themes :).

The best FAQ plugin on the market that has absolutely NO ADS

Deleting the plugin breaks /wp-admin/ if deleted through the WordPress admin area. 

Deleting plugin breaks WP admin, no support

It’s a MIT-licensed (can be used in premium themes), high quality, native and responsive WordPress plugin to create and view expandable F.A.Q.'s

Adjustly Collapse vs Expandable FAQ