Add WYSIWYG Markdown editor (EasyMDE) to wiki pages

Reusable MarkdownEditor component using EasyMDE:
- Toolbar: bold, italic, headings, quotes, lists, links, images,
  tables, code blocks, preview, side-by-side, fullscreen
- Dark mode support with custom CSS overrides
- Value syncs via bind:value for form submission
- Applied to both wiki new and edit pages
- Replaces the plain textarea + manual preview toggle

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -16,6 +16,7 @@
 				"date-fns": "^4.1.0",
 				"dotenv": "^17.4.1",
 				"drizzle-orm": "^0.38.4",
+				"easymde": "^2.20.0",
 				"marked": "^18.0.0",
 				"pg": "^8.13.1",
 				"qrcode": "^1.5.4",
@@ -2526,6 +2527,15 @@
 				"tslib": "^2.4.0"
 			}
 		},
+		"node_modules/@types/codemirror": {
+			"version": "5.60.17",
+			"resolved": "https://registry.npmjs.org/@types/codemirror/-/codemirror-5.60.17.tgz",
+			"integrity": "sha512-AZq2FIsUHVMlp7VSe2hTfl5w4pcUkoFkM3zVsRKsn1ca8CXRDYvnin04+HP2REkwsxemuHqvDofdlhUWNpbwfw==",
+			"license": "MIT",
+			"dependencies": {
+				"@types/tern": "*"
+			}
+		},
 		"node_modules/@types/cookie": {
 			"version": "0.6.0",
 			"resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.6.0.tgz",
@@ -2537,7 +2547,12 @@
 			"version": "1.0.8",
 			"resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
 			"integrity": "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==",
-			"dev": true,
+			"license": "MIT"
+		},
+		"node_modules/@types/marked": {
+			"version": "4.3.2",
+			"resolved": "https://registry.npmjs.org/@types/marked/-/marked-4.3.2.tgz",
+			"integrity": "sha512-a79Yc3TOk6dGdituy8hmTTJXjOkZ7zsFYV10L337ttq/rec8lRMDBpV7fL3uLx6TgbFCa5DU/h8FmIBQPSbU0w==",
 			"license": "MIT"
 		},
 		"node_modules/@types/node": {
@@ -2579,6 +2594,15 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/@types/tern": {
+			"version": "0.23.9",
+			"resolved": "https://registry.npmjs.org/@types/tern/-/tern-0.23.9.tgz",
+			"integrity": "sha512-ypzHFE/wBzh+BlH6rrBgS5I/Z7RD21pGhZ2rltb/+ZrVM1awdZwjx7hE5XfuYgHWk9uvV5HLZN3SloevCAp3Bw==",
+			"license": "MIT",
+			"dependencies": {
+				"@types/estree": "*"
+			}
+		},
 		"node_modules/@types/trusted-types": {
 			"version": "2.0.7",
 			"resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
@@ -2719,6 +2743,21 @@
 				"node": ">=6"
 			}
 		},
+		"node_modules/codemirror": {
+			"version": "5.65.21",
+			"resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.65.21.tgz",
+			"integrity": "sha512-6teYk0bA0nR3QP0ihGMoxuKzpl5W80FpnHpBJpgy66NK3cZv5b/d/HY8PnRvfSsCG1MTfr92u2WUl+wT0E40mQ==",
+			"license": "MIT"
+		},
+		"node_modules/codemirror-spell-checker": {
+			"version": "1.1.2",
+			"resolved": "https://registry.npmjs.org/codemirror-spell-checker/-/codemirror-spell-checker-1.1.2.tgz",
+			"integrity": "sha512-2Tl6n0v+GJRsC9K3MLCdLaMOmvWL0uukajNJseorZJsslaxZyZMgENocPU8R0DyoTAiKsyqiemSOZo7kjGV0LQ==",
+			"license": "MIT",
+			"dependencies": {
+				"typo-js": "*"
+			}
+		},
 		"node_modules/color": {
 			"version": "4.2.3",
 			"resolved": "https://registry.npmjs.org/color/-/color-4.2.3.tgz",
@@ -3012,6 +3051,31 @@
 				}
 			}
 		},
+		"node_modules/easymde": {
+			"version": "2.20.0",
+			"resolved": "https://registry.npmjs.org/easymde/-/easymde-2.20.0.tgz",
+			"integrity": "sha512-V1Z5f92TfR42Na852OWnIZMbM7zotWQYTddNaLYZFVKj7APBbyZ3FYJ27gBw2grMW3R6Qdv9J8n5Ij7XRSIgXQ==",
+			"license": "MIT",
+			"dependencies": {
+				"@types/codemirror": "^5.60.10",
+				"@types/marked": "^4.0.7",
+				"codemirror": "^5.65.15",
+				"codemirror-spell-checker": "1.1.2",
+				"marked": "^4.1.0"
+			}
+		},
+		"node_modules/easymde/node_modules/marked": {
+			"version": "4.3.0",
+			"resolved": "https://registry.npmjs.org/marked/-/marked-4.3.0.tgz",
+			"integrity": "sha512-PRsaiG84bK+AMvxziE/lCFss8juXjNaWzVbN5tXAm4XjeaS9NAHhop+PjQxz2A9h8Q4M/xGmzP8vqNwy6JeK0A==",
+			"license": "MIT",
+			"bin": {
+				"marked": "bin/marked.js"
+			},
+			"engines": {
+				"node": ">= 12"
+			}
+		},
 		"node_modules/emoji-regex": {
 			"version": "8.0.0",
 			"resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -4867,6 +4931,12 @@
 				"node": ">=14.17"
 			}
 		},
+		"node_modules/typo-js": {
+			"version": "1.3.1",
+			"resolved": "https://registry.npmjs.org/typo-js/-/typo-js-1.3.1.tgz",
+			"integrity": "sha512-elJkpCL6Z77Ghw0Lv0lGnhBAjSTOQ5FhiVOCfOuxhaoTT2xtLVbqikYItK5HHchzPbHEUFAcjOH669T2ZzeCbg==",
+			"license": "BSD-3-Clause"
+		},
 		"node_modules/undici-types": {
 			"version": "7.18.2",
 			"resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",

package.json

@@ -23,6 +23,7 @@
 		"date-fns": "^4.1.0",
 		"dotenv": "^17.4.1",
 		"drizzle-orm": "^0.38.4",
+		"easymde": "^2.20.0",
 		"marked": "^18.0.0",
 		"pg": "^8.13.1",
 		"qrcode": "^1.5.4",

src/lib/components/ui/MarkdownEditor.svelte

@@ -0,0 +1,111 @@
+<script lang="ts">
+	import { onMount, onDestroy } from 'svelte';
+	import { browser } from '$app/environment';
+
+	interface Props {
+		name?: string;
+		value?: string;
+		placeholder?: string;
+	}
+
+	let { name = 'content', value = $bindable(''), placeholder = 'Write in Markdown...' }: Props = $props();
+
+	let textareaEl: HTMLTextAreaElement;
+	let editor: any = null;
+
+	onMount(async () => {
+		if (!browser) return;
+
+		const EasyMDE = (await import('easymde')).default;
+		await import('easymde/dist/easymde.min.css');
+
+		editor = new EasyMDE({
+			element: textareaEl,
+			initialValue: value,
+			spellChecker: false,
+			autofocus: false,
+			placeholder,
+			status: false,
+			minHeight: '300px',
+			toolbar: [
+				'bold', 'italic', 'heading', '|',
+				'quote', 'unordered-list', 'ordered-list', '|',
+				'link', 'image', 'table', 'code', '|',
+				'preview', 'side-by-side', 'fullscreen', '|',
+				'guide'
+			],
+			sideBySideFullscreen: false
+		});
+
+		editor.codemirror.on('change', () => {
+			value = editor.value();
+		});
+	});
+
+	onDestroy(() => {
+		if (editor) {
+			editor.toTextArea();
+			editor = null;
+		}
+	});
+</script>
+
+<div class="markdown-editor">
+	<textarea bind:this={textareaEl} id={name}></textarea>
+	<input type="hidden" {name} value={value} />
+</div>
+
+<style>
+	.markdown-editor :global(.EasyMDEContainer) {
+		border: none;
+	}
+	.markdown-editor :global(.EasyMDEContainer .CodeMirror) {
+		border: 1px solid #d1d5db;
+		border-radius: 0.375rem;
+		font-family: ui-monospace, monospace;
+		font-size: 0.875rem;
+	}
+	.markdown-editor :global(.editor-toolbar) {
+		border: 1px solid #d1d5db;
+		border-bottom: none;
+		border-radius: 0.375rem 0.375rem 0 0;
+		opacity: 1;
+	}
+	.markdown-editor :global(.editor-toolbar button) {
+		color: #6b7280 !important;
+	}
+	.markdown-editor :global(.editor-toolbar button:hover) {
+		background: #f3f4f6;
+	}
+	.markdown-editor :global(.editor-toolbar button.active) {
+		background: #e5e7eb;
+	}
+	/* Dark mode */
+	:global(.dark) .markdown-editor :global(.CodeMirror) {
+		background: #374151;
+		color: #f3f4f6;
+		border-color: #4b5563;
+	}
+	:global(.dark) .markdown-editor :global(.editor-toolbar) {
+		background: #1f2937;
+		border-color: #4b5563;
+	}
+	:global(.dark) .markdown-editor :global(.editor-toolbar button) {
+		color: #9ca3af !important;
+	}
+	:global(.dark) .markdown-editor :global(.editor-toolbar button:hover) {
+		background: #374151;
+	}
+	:global(.dark) .markdown-editor :global(.CodeMirror-cursor) {
+		border-color: #f3f4f6;
+	}
+	:global(.dark) .markdown-editor :global(.editor-preview) {
+		background: #374151;
+		color: #f3f4f6;
+	}
+	:global(.dark) .markdown-editor :global(.editor-preview-side) {
+		background: #374151;
+		color: #f3f4f6;
+		border-color: #4b5563;
+	}
+</style>

src/routes/(app)/wiki/[slug]/edit/+page.svelte

@@ -1,14 +1,11 @@
 <script lang="ts">
 	import { enhance } from '$app/forms';
-	import { marked } from 'marked';
 	import TagInput from '$lib/components/ui/TagInput.svelte';
+	import MarkdownEditor from '$lib/components/ui/MarkdownEditor.svelte';
 
 	let { data, form } = $props();
 
 	let content = $state(data.page.content);
-	let showPreview = $state(false);
-
-	const renderedContent = $derived(marked(content) as string);
 </script>
 
 <svelte:head>
@@ -54,24 +51,8 @@
 		</div>
 
 		<div>
-			<div class="mb-1 flex items-center justify-between">
+			<span class="mb-1 block text-sm font-medium text-gray-700 dark:text-gray-300">Content * (Markdown)</span>
-				<label for="content" class="text-sm font-medium text-gray-700 dark:text-gray-300">Content * (Markdown)</label>
+			<MarkdownEditor bind:value={content} />
-				<button type="button" onclick={() => (showPreview = !showPreview)}
-					class="rounded-md px-2 py-1 text-xs text-blue-600 hover:bg-blue-50 dark:text-blue-400 dark:hover:bg-blue-900/20">
-					{showPreview ? 'Editor' : 'Preview'}
-				</button>
-			</div>
-
-			{#if showPreview}
-				<div class="prose prose-sm dark:prose-invert min-h-[300px] max-w-none rounded-md border border-gray-300 bg-white p-4 dark:border-gray-600 dark:bg-gray-700">
-					{@html renderedContent}
-				</div>
-				<input type="hidden" name="content" value={content} />
-			{:else}
-				<textarea id="content" name="content" rows="20" required
-					bind:value={content}
-					class="w-full rounded-md border border-gray-300 px-3 py-2 font-mono text-sm focus:border-blue-500 focus:ring-1 focus:ring-blue-500 focus:outline-none dark:border-gray-600 dark:bg-gray-700 dark:text-white"></textarea>
-			{/if}
 		</div>
 
 		<div class="flex items-center gap-3">

src/routes/(app)/wiki/new/+page.svelte

@@ -1,14 +1,11 @@
 <script lang="ts">
 	import { enhance } from '$app/forms';
-	import { marked } from 'marked';
 	import TagInput from '$lib/components/ui/TagInput.svelte';
+	import MarkdownEditor from '$lib/components/ui/MarkdownEditor.svelte';
 
 	let { data, form } = $props();
 
 	let content = $state('');
-	let showPreview = $state(false);
-
-	const renderedContent = $derived(marked(content) as string);
 </script>
 
 <svelte:head>
@@ -54,25 +51,8 @@
 
 		<!-- Markdown editor -->
 		<div>
-			<div class="mb-1 flex items-center justify-between">
+			<span class="mb-1 block text-sm font-medium text-gray-700 dark:text-gray-300">Content * (Markdown)</span>
-				<label for="content" class="text-sm font-medium text-gray-700 dark:text-gray-300">Content * (Markdown)</label>
+			<MarkdownEditor bind:value={content} placeholder="Write your guide in Markdown..." />
-				<button type="button" onclick={() => (showPreview = !showPreview)}
-					class="rounded-md px-2 py-1 text-xs text-blue-600 hover:bg-blue-50 dark:text-blue-400 dark:hover:bg-blue-900/20">
-					{showPreview ? 'Editor' : 'Preview'}
-				</button>
-			</div>
-
-			{#if showPreview}
-				<div class="prose prose-sm dark:prose-invert min-h-[300px] max-w-none rounded-md border border-gray-300 bg-white p-4 dark:border-gray-600 dark:bg-gray-700">
-					{@html renderedContent}
-				</div>
-				<input type="hidden" name="content" value={content} />
-			{:else}
-				<textarea id="content" name="content" rows="15" required
-					bind:value={content}
-					class="w-full rounded-md border border-gray-300 px-3 py-2 font-mono text-sm focus:border-blue-500 focus:ring-1 focus:ring-blue-500 focus:outline-none dark:border-gray-600 dark:bg-gray-700 dark:text-white dark:placeholder-gray-400"
-					placeholder="# Getting Started&#10;&#10;Write your guide in Markdown...&#10;&#10;## Steps&#10;&#10;1. First step&#10;2. Second step&#10;&#10;**Bold text** and `code` are supported."></textarea>
-			{/if}
 		</div>
 
 		<div class="flex items-center gap-3">