diff --git a/.distignore b/.distignore
index 6b9f73d..b360158 100644
--- a/.distignore
+++ b/.distignore
@@ -2,12 +2,17 @@
 .github
 assets
 node_modules
+src
 vendor
 .distignore
+.editorconfig
 .eslintrc.js
 .gitignore
 .phpcs.xml.dist
+.prettierrc.js
 composer.json
 composer.lock
 package-lock.json
 package.json
+phpstan.neon.dist
+webpack.config.js
diff --git a/README.md b/README.md
index a18d8c4..2f31ea6 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,13 @@ The "Controls ID" entered in this panel must match the "HTML anchor" assigned to
 
 ## Changelog
 
+### 0.4.0
+
+* Add an attribute to toggle a toggle block-specific class on the body element.
+* Allow the toggle block to be placed inside the `core/navigation` block.
+* Add transform support from/to `core/navigation-link` blocks.
+* Update to latest dependencies, build process, and code standards.
+
 ### 0.3.1
 
 * Add persisting `toggle-block-has-been-toggled` class to toggled element when first toggled.
diff --git a/build/toggle-block/block.json b/build/toggle-block/block.json
index 3668239..c069a18 100644
--- a/build/toggle-block/block.json
+++ b/build/toggle-block/block.json
@@ -13,7 +13,7 @@
 		"file:view.js"
 	],
 	"style": [
-		"file:../src/view.css"
+		"file:view.css"
 	],
 	"attributes": {
 		"bodyClass": {
diff --git a/build/toggle-block/index.asset.php b/build/toggle-block/index.asset.php
index f9ecafe..768b55b 100644
--- a/build/toggle-block/index.asset.php
+++ b/build/toggle-block/index.asset.php
@@ -1 +1 @@
-<?php return array('dependencies' => array('wp-block-editor', 'wp-blocks', 'wp-components', 'wp-hooks', 'wp-i18n'), 'version' => '1b8472592ef953dd9320');
+<?php return array('dependencies' => array('wp-block-editor', 'wp-blocks', 'wp-components', 'wp-hooks', 'wp-i18n'), 'version' => 'bff6c727c01bcb9ce96f');
diff --git a/build/toggle-block/index.js b/build/toggle-block/index.js
index b78a411..5aba0b0 100644
--- a/build/toggle-block/index.js
+++ b/build/toggle-block/index.js
@@ -1 +1 @@
-(()=>{"use strict";function t(){return t=Object.assign?Object.assign.bind():function(t){for(var e=1;e<arguments.length;e++){var o=arguments[e];for(var r in o)({}).hasOwnProperty.call(o,r)&&(t[r]=o[r])}return t},t.apply(null,arguments)}const e=window.wp.blockEditor,o=window.wp.blocks,r=window.wp.components,n=window.wp.i18n,l=JSON.parse('{"$schema":"https://json.schemastore.org/block.json","apiVersion":3,"name":"happyprime/toggle-block","title":"Toggle Block","category":"widgets","icon":"location","description":"Toggle button to show and hide another block.","version":"0.2.0","textdomain":"toggle-block","editorScript":"file:index.js","viewScript":["file:view.js"],"style":["file:../src/view.css"],"attributes":{"bodyClass":{"type":"string","default":""},"buttonText":{"type":"string","default":""},"controlsId":{"type":"string","default":""},"labelText":{"type":"string","default":""}},"supports":{"align":true,"alignWide":true,"anchor":true,"color":{"background":true,"enableContrastChecker":true,"text":true,"gradients":true},"defaultStylePicker":true,"dimensions":{"minHeight":true},"html":false,"position":{"sticky":false},"spacing":{"margin":true,"padding":true},"typography":{"fontSize":true,"lineHeight":true}}}');function a(t,e){(null==e||e>t.length)&&(e=t.length);for(var o=0,r=Array(e);o<e;o++)r[o]=t[o];return r}function i(t){return i="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},i(t)}function c(t,e,o){return(e=function(t){var e=function(t){if("object"!=i(t)||!t)return t;var e=t[Symbol.toPrimitive];if(void 0!==e){var o=e.call(t,"string");if("object"!=i(o))return o;throw new TypeError("@@toPrimitive must return a primitive value.")}return String(t)}(t);return"symbol"==i(e)?e:e+""}(e))in t?Object.defineProperty(t,e,{value:o,enumerable:!0,configurable:!0,writable:!0}):t[e]=o,t}function s(t,e){var o=Object.keys(t);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(t);e&&(r=r.filter((function(e){return Object.getOwnPropertyDescriptor(t,e).enumerable}))),o.push.apply(o,r)}return o}function u(t){for(var e=1;e<arguments.length;e++){var o=null!=arguments[e]?arguments[e]:{};e%2?s(Object(o),!0).forEach((function(e){c(t,e,o[e])})):Object.getOwnPropertyDescriptors?Object.defineProperties(t,Object.getOwnPropertyDescriptors(o)):s(Object(o)).forEach((function(e){Object.defineProperty(t,e,Object.getOwnPropertyDescriptor(o,e))}))}return t}(0,window.wp.hooks.addFilter)("blocks.registerBlockType","happyprime/add-toggle-to-navigation",(function(t,e){if("core/navigation"!==e)return t;var o,r=t.allowedBlocks||[];return u(u({},t),{},{allowedBlocks:[].concat((o=r,function(t){if(Array.isArray(t))return a(t)}(o)||function(t){if("undefined"!=typeof Symbol&&null!=t[Symbol.iterator]||null!=t["@@iterator"])return Array.from(t)}(o)||function(t,e){if(t){if("string"==typeof t)return a(t,e);var o={}.toString.call(t).slice(8,-1);return"Object"===o&&t.constructor&&(o=t.constructor.name),"Map"===o||"Set"===o?Array.from(t):"Arguments"===o||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(o)?a(t,e):void 0}}(o)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}()),["happyprime/toggle-block"])})}));var b={from:[{type:"block",blocks:["core/navigation-link"],transform:function(t,e){return(0,o.createBlock)("happyprime/toggle-block",{buttonText:t.label||t.title||""},e)}}],to:[{type:"block",blocks:["core/navigation-link"],transform:function(t,e){return(0,o.createBlock)("core/navigation-link",{label:t.buttonText||"",url:"#"},e)}}]};(0,o.registerBlockType)(l,{edit:function(o){var l=o.attributes,a=l.bodyClass,i=l.buttonText,c=l.controlsId,s=l.labelText,u=o.setAttributes;return React.createElement(React.Fragment,null,React.createElement(e.InspectorControls,null,React.createElement(r.PanelBody,{title:(0,n.__)("Toggle settings","toggle-block")},React.createElement(r.TextControl,{label:(0,n.__)("Controls ID","toggle-block"),description:(0,n.__)("Enter the HTML anchor ID of the element this toggle controls.","toggle-block"),value:c,onChange:function(t){return u({controlsId:t})}}),React.createElement(r.TextControl,{label:(0,n.__)("Screen reader text","toggle-block"),description:(0,n.__)("Enter a description of what this toggle controls.","toggle-block"),value:s,onChange:function(t){return u({labelText:t})}}),React.createElement(r.TextControl,{label:(0,n.__)("Body class","toggle-block"),description:(0,n.__)("Enter a class to add to the body when the toggle is active.","toggle-block"),value:a,onChange:function(t){return u({bodyClass:t})}}))),React.createElement(e.RichText,t({},(0,e.useBlockProps)(),{tagName:"span",label:(0,n.__)("Button text","toggle-block"),placeholder:(0,n.__)("Button text","toggle-block"),value:i,onChange:function(t){u({buttonText:t})}})))},save:function(o){var r=o.attributes,n=r.bodyClass,l=r.buttonText,a=r.controlsId,i=r.labelText;return React.createElement("button",t({},e.useBlockProps.save(),{"aria-label":i,"aria-controls":a},n&&{"data-body-class":n}),l)},transforms:b})})();
\ No newline at end of file
+(()=>{"use strict";function t(){return t=Object.assign?Object.assign.bind():function(t){for(var e=1;e<arguments.length;e++){var o=arguments[e];for(var r in o)({}).hasOwnProperty.call(o,r)&&(t[r]=o[r])}return t},t.apply(null,arguments)}const e=window.wp.blockEditor,o=window.wp.blocks,r=window.wp.components,n=window.wp.i18n,l=JSON.parse('{"$schema":"https://json.schemastore.org/block.json","apiVersion":3,"name":"happyprime/toggle-block","title":"Toggle Block","category":"widgets","icon":"location","description":"Toggle button to show and hide another block.","version":"0.2.0","textdomain":"toggle-block","editorScript":"file:index.js","viewScript":["file:view.js"],"style":["file:view.css"],"attributes":{"bodyClass":{"type":"string","default":""},"buttonText":{"type":"string","default":""},"controlsId":{"type":"string","default":""},"labelText":{"type":"string","default":""}},"supports":{"align":true,"alignWide":true,"anchor":true,"color":{"background":true,"enableContrastChecker":true,"text":true,"gradients":true},"defaultStylePicker":true,"dimensions":{"minHeight":true},"html":false,"position":{"sticky":false},"spacing":{"margin":true,"padding":true},"typography":{"fontSize":true,"lineHeight":true}}}');function a(t,e){(null==e||e>t.length)&&(e=t.length);for(var o=0,r=Array(e);o<e;o++)r[o]=t[o];return r}function i(t){return i="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},i(t)}function c(t,e,o){return(e=function(t){var e=function(t){if("object"!=i(t)||!t)return t;var e=t[Symbol.toPrimitive];if(void 0!==e){var o=e.call(t,"string");if("object"!=i(o))return o;throw new TypeError("@@toPrimitive must return a primitive value.")}return String(t)}(t);return"symbol"==i(e)?e:e+""}(e))in t?Object.defineProperty(t,e,{value:o,enumerable:!0,configurable:!0,writable:!0}):t[e]=o,t}function s(t,e){var o=Object.keys(t);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(t);e&&(r=r.filter((function(e){return Object.getOwnPropertyDescriptor(t,e).enumerable}))),o.push.apply(o,r)}return o}function u(t){for(var e=1;e<arguments.length;e++){var o=null!=arguments[e]?arguments[e]:{};e%2?s(Object(o),!0).forEach((function(e){c(t,e,o[e])})):Object.getOwnPropertyDescriptors?Object.defineProperties(t,Object.getOwnPropertyDescriptors(o)):s(Object(o)).forEach((function(e){Object.defineProperty(t,e,Object.getOwnPropertyDescriptor(o,e))}))}return t}(0,window.wp.hooks.addFilter)("blocks.registerBlockType","happyprime/add-toggle-to-navigation",(function(t,e){if("core/navigation"!==e)return t;var o,r=t.allowedBlocks||[];return u(u({},t),{},{allowedBlocks:[].concat((o=r,function(t){if(Array.isArray(t))return a(t)}(o)||function(t){if("undefined"!=typeof Symbol&&null!=t[Symbol.iterator]||null!=t["@@iterator"])return Array.from(t)}(o)||function(t,e){if(t){if("string"==typeof t)return a(t,e);var o={}.toString.call(t).slice(8,-1);return"Object"===o&&t.constructor&&(o=t.constructor.name),"Map"===o||"Set"===o?Array.from(t):"Arguments"===o||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(o)?a(t,e):void 0}}(o)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}()),["happyprime/toggle-block"])})}));var b={from:[{type:"block",blocks:["core/navigation-link"],transform:function(t,e){return(0,o.createBlock)("happyprime/toggle-block",{buttonText:t.label||t.title||""},e)}}],to:[{type:"block",blocks:["core/navigation-link"],transform:function(t,e){return(0,o.createBlock)("core/navigation-link",{label:t.buttonText||"",url:"#"},e)}}]};(0,o.registerBlockType)(l,{edit:function(o){var l=o.attributes,a=l.bodyClass,i=l.buttonText,c=l.controlsId,s=l.labelText,u=o.setAttributes;return React.createElement(React.Fragment,null,React.createElement(e.InspectorControls,null,React.createElement(r.PanelBody,{title:(0,n.__)("Toggle settings","toggle-block")},React.createElement(r.TextControl,{label:(0,n.__)("Controls ID","toggle-block"),description:(0,n.__)("Enter the HTML anchor ID of the element this toggle controls.","toggle-block"),value:c,onChange:function(t){return u({controlsId:t})}}),React.createElement(r.TextControl,{label:(0,n.__)("Screen reader text","toggle-block"),description:(0,n.__)("Enter a description of what this toggle controls.","toggle-block"),value:s,onChange:function(t){return u({labelText:t})}}),React.createElement(r.TextControl,{label:(0,n.__)("Body class","toggle-block"),description:(0,n.__)("Enter a class to add to the body when the toggle is active.","toggle-block"),value:a,onChange:function(t){return u({bodyClass:t})}}))),React.createElement(e.RichText,t({},(0,e.useBlockProps)(),{tagName:"span",label:(0,n.__)("Button text","toggle-block"),placeholder:(0,n.__)("Button text","toggle-block"),value:i,onChange:function(t){u({buttonText:t})}})))},save:function(o){var r=o.attributes,n=r.bodyClass,l=r.buttonText,a=r.controlsId,i=r.labelText;return React.createElement("button",t({},e.useBlockProps.save(),{"aria-label":i,"aria-controls":a},n&&{"data-body-class":n}),l)},transforms:b})})();
\ No newline at end of file
diff --git a/build/toggle-block/view.css b/build/toggle-block/view.css
new file mode 100644
index 0000000..ffd150d
--- /dev/null
+++ b/build/toggle-block/view.css
@@ -0,0 +1,7 @@
+.wp-site-blocks .toggle-block-hidden {
+	display: none;
+}
+
+.editor-styles-wrapper .wp-block-happyprime-toggle-block {
+	display: inline-block;
+}
diff --git a/composer.json b/composer.json
index a254f6f..1080411 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
 	"name": "happyprime/toggle-block",
 	"description": "Add a toggle to show and hide another block.",
-	"version": "0.3.1",
+	"version": "0.4.0",
 	"type": "wordpress-plugin",
 	"minimum-stability": "stable",
 	"license": "GPLv2-or-later",
diff --git a/composer.lock b/composer.lock
index 0b5e853..e39d9b6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8e6ad698379cc1aa1fea84d9412d2df3",
+    "content-hash": "baa8c2b19816c8309f7898f2a9a44a30",
     "packages": [],
     "packages-dev": [
         {
diff --git a/package-lock.json b/package-lock.json
index 1149489..6f443c0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "toggle-block",
-	"version": "0.3.1",
+	"version": "0.4.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "toggle-block",
-			"version": "0.3.1",
+			"version": "0.4.0",
 			"license": "GPL-2.0-or-later",
 			"devDependencies": {
 				"@babel/core": "^7.27.1",
diff --git a/package.json b/package.json
index 4adc2d2..e5424ce 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "toggle-block",
-	"version": "0.3.1",
+	"version": "0.4.0",
 	"description": "Add a toggle to show and hide another block",
 	"author": "Happy Prime",
 	"license": "GPL-2.0-or-later",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..315afa6
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,5 @@
+includes:
+  - %rootDir%/../../happyprime/coding-standards/phpstan.neon.dist
+
+parameters:
+  level: 9
diff --git a/plugin.php b/plugin.php
index 681e25e..ea1c5d9 100644
--- a/plugin.php
+++ b/plugin.php
@@ -2,7 +2,7 @@
 /**
  * Plugin Name:  Toggle Block
  * Description:  Add a toggle to show and hide another block.
- * Version:      0.3.1
+ * Version:      0.4.0
  * Plugin URI:   https://github.com/happyprime/toggle-block/
  * Author:       Happy Prime
  * Author URI:   https://happyprime.co
@@ -31,21 +31,21 @@
 /**
  * Register the block.
  */
-function register() {
+function register(): void {
 	register_block_type_from_metadata( __DIR__ . '/build/toggle-block' );
 }
 
 /**
  * Ensure the block's view script is output in document footer.
  */
-function alter_view_script() {
-	$asset_data = require __DIR__ . '/build/toggle-block/view.asset.php';
+function alter_view_script(): void {
+	wp_deregister_script( 'happyprime-toggle-block-view-script' );
 
 	wp_register_script(
 		'happyprime-toggle-block-view-script',
 		plugins_url( 'build/toggle-block/view.js', __FILE__ ),
-		$asset_data['dependencies'],
-		filemtime( __DIR__ . '/build/toggle-block/view.js' ),
+		[],
+		(string) filemtime( __DIR__ . '/build/toggle-block/view.js' ),
 		true
 	);
 }
diff --git a/src/toggle-block/block.json b/src/toggle-block/block.json
index 3668239..c069a18 100644
--- a/src/toggle-block/block.json
+++ b/src/toggle-block/block.json
@@ -13,7 +13,7 @@
 		"file:view.js"
 	],
 	"style": [
-		"file:../src/view.css"
+		"file:view.css"
 	],
 	"attributes": {
 		"bodyClass": {
diff --git a/webpack.config.js b/webpack.config.js
index 78e604d..6367875 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -71,6 +71,23 @@ module.exports = {
 						);
 					},
 				},
+				{
+					from: 'src/**/*.css',
+					to({ context, absoluteFilename }) {
+						const srcDir = path.resolve(context, 'src');
+						const relativeToSrc = path.relative(
+							srcDir,
+							absoluteFilename
+						);
+						const dir = path.dirname(relativeToSrc);
+						return path.resolve(
+							context,
+							'build',
+							dir,
+							'[name][ext]'
+						);
+					},
+				},
 			],
 		}),
 	],