Add a cascading dropdown to WordPress that redirects visitors on selection — no form builder needed.

Elmspur

Elmspur Cascade adds a cascading dropdown redirect block to the WordPress block editor. Visitors pick from one or more dependent dropdowns — for example Category → Topic → Page — and are redirected to the URL attached to their final choice. No form plugin or shortcode is required.
Each dropdown filters the next: choosing a value in one level determines the options available in the next. When the visitor reaches an item that has a URL, they are sent to it — either immediately, or after clicking a button you can label yourself.
<h4>Features</h4>
<ul>
<li>Native block — works in posts, pages, the Site Editor, templates, template parts, and block widget areas. Compatible with FSE/block themes.</li>
<li>Visual tree builder — point-and-click interface to add, edit, nest, and reorder dropdown items without touching JSON.</li>
<li>Up to 5 levels of dependent dropdowns. Branches don’t have to reach the maximum; a 2-level branch redirects from level 2 and remaining dropdowns stay disabled.</li>
<li>Redirect immediately on final selection, or show a button the visitor clicks to go.</li>
<li>Open in a new tab option.</li>
<li>Custom placeholder text for each level.</li>
<li>Navigation block variant — a compact version that lives inside the core Navigation block, inline with your other menu links.</li>
<li>Wide and full alignment support; inherits your theme’s button styles.</li>
<li>No form builder required. No shortcodes. No build step.</li>
</ul>
<h4>Use cases</h4>
<ul>
<li>Support sites: Product → Issue Type → Help article</li>
<li>Multi-location businesses: Country → City → Location page</li>
<li>Course sites: Subject → Course → Lesson</li>
</ul>
<h4>Companion add-on</h4>
A separate add-on, distributed from elmspur.com (not from WordPress.org), adds saved/reusable dropdown trees: define a tree once, link it to as many blocks as you like, and edits propagate site-wide. It is optional — this plugin is fully functional on its own.
<h3>The JSON format</h3>
An array of items. Each item has a “label” and either “children” (an array of more items) or a “url”.
[ 
 { 
 “label”: “Category A”, 
 “children”: [ 
 { 
 “label”: “Subcategory A1”, 
 “children”: [ 
 { “label”: “Page one”, “url”: “https://example.com/a/a1/one” }, 
 { “label”: “Page two”, “url”: “https://example.com/a/a1/two” } 
 ] 
 } 
 ] 
 } 
]
<h3>Settings (block sidebar)</h3>
<ul>
<li>Menu data — the JSON hierarchy (also editable via the visual tree builder).</li>
<li>Redirect immediately on final selection — skip the Go button.</li>
<li>Open in a new tab.</li>
<li>Button label.</li>
<li>Placeholder text for each level.</li>
</ul>

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