satoshi256kbyte

<ul>
<li>Contact Form 7 must be installed to run this plugin.</li>
<li>In the form created with Contact Form 7, you can add a condition to the required check of the item.</li>
<li>You can specify various conditions such as when an item has been entered or when it is equal to the specified value.</li>
</ul>
<a href="https://satoshi256kbyte.github.io/product/contact-form-if/" rel="nofollow ugc">Docs</a>
<h4>Available conditions</h4>
<ul>
<li>is null</li>
<li>not null</li>
<li>equal</li>
<li>not equal</li>
<li>greater than(>)</li>
<li>greater equal(>=)</li>
<li>less than(<)</li>
<li>less equal(<=)</li>
<li>in</li>
<li>not in</li>
</ul>
<h4>Example</h4>
This setting is required only when a certain item is 2 or more. 
See the developer’s site for other use cases. 
<a href="https://satoshi256kbyte.github.io/product/contact-form-if/" rel="nofollow ugc">Docs</a>
Form 
 <code><label>Text1</label>[text eq-1] 
<label>Text2</label>[text eq-2] 
 
[submit "Submit"]</code>
Additional Settings 
 <code>requireif-eq-2:eq-1,greater_equal,2,This item is required when "text 1" is 2 or more.</code>

Contact Form IF

It is a plugin that adds conditional branching to the required check of the Conact form 7.

Hackbard23

You are using the Contact Forms 7 Plugin and are angy about the none HTML 5 Support? 
No Problem. With this Plugin u will have the normal Datepicker & Number Spinner from jQuery in your Internet Explorers and other none HTML5 browsers.
If you have Questions or Feature Request, feel free and contact me.

Contact Form 7 IE DatePicker and Number Spinner Fix

Still works on actual WP 4.7.3. but the need to hack the date format in plugin it self makes it bit awkward.

missing set date format

Works like a charm!

Add the jQuery Datepicker and Spinner functionality to your Contact Form 7

Contact Form IF vs Contact Form 7 IE DatePicker and Number Spinner Fix