Rodrigo Leon

This small plugin allows you to create a modal / popup / lightbox with WordPress’ default Block editor (Gutenberg). The plugin provides you with a block that can be used for the modal’s trigger and the modal’s window contents. Anything you can do with the block editor, you can use for the modal trigger or the contents.
<ul>
<li>Multiple trigger methods. Use the power of the Block Editor to create your trigger (buttons, images, covers, and more).</li>
<li>Flexible modal content. Similarly to the trigger, use the Block Editor to define the content inside your modal content.</li>
<li>Supports multiple modals on the same page.</li>
<li>More to come.</li>
</ul>
To create a modal, simply use the Modal Builder block to create a trigger. Use another Modal Builder block to create the content (make sure you select the appropriate content type under the modal settings). On both instances, set the “Content ID” to whatever you want as long as both instances match. You are set.
<h4>Donations</h4>
If you like the plugin, consider leaving a donation to support further development of the plugin. <a href="https://paypal.me/rodxleon" rel="nofollow ugc">Click here</a>. If you would like custom solutions or the like, please visit <a href="https://htr.design" rel="nofollow ugc">HTR.Design</a>.

Modal Builder Block

Build a modal with the power of WordPress' block editor. Anything you can do with the editor works inside of the modal content window or the moda …

Yannick Lefebvre

The purpose of this plugin is to allow users to create one or more modal dialog(s) / pop-up window(s) that will appear when a user visits their site. The number of times that these can load is configurable. They can load content from external sites or custom HTML code into the dialog. This plugin can be used to invite people to register to a newsletter, respond to a survey, or simply welcome come to a site upon their first visit.
You can try it out in a temporary copy of WordPress <a href="https://demo.tastewp.com/modal-dialog" rel="nofollow ugc">here</a>.

Modal Dialog

The others either didn't work or caused massive JavaScript problems, breaking other plugins.

This plugin worked the best.

Worked better than the others

The purpose of this plugin is to allow users to create one or more modal dialog(s) / pop-up window(s) that will appear when a user visits their site.

Modal Builder Block vs Modal Dialog