适用于 JavaScript 的原生优先、高性能 Markdown 插件

# forms.py
class PostForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['content']
        widgets = {
            'content': forms.Textarea(attrs={'class': 'markdown-editor'}),
        }

new MarkdownEditor('.markdown-editor');
// request.POST['content'] contains the markdown on submit

<textarea name="content" class="markdown-editor">{{ old('content') }}</textarea>
<script>new MarkdownEditor('.markdown-editor');</script>

document.addEventListener('turbo:load', () => {
    document.querySelectorAll('.markdown-editor:not([data-mde-init])').forEach(el => {
        el.setAttribute('data-mde-init', 'true');
        new MarkdownEditor(el);
    });
});

<textarea name="content" class="markdown-editor"></textarea>
<script src="https://cdn.jsdelivr.net/npm/markdown-text-editor"></script>
<script>new MarkdownEditor('.markdown-editor');</script>

<form method="POST" action="save.php">
  <textarea name="content" class="markdown-editor"></textarea>
  <button type="submit">Save</button>
</form>
<script src="https://cdn.jsdelivr.net/npm/markdown-text-editor"></script>
<script>new MarkdownEditor('.markdown-editor');</script>

import MarkdownEditor from 'markdown-text-editor';
new MarkdownEditor('#markdown-editor');

<script type="module">
  import MarkdownEditor from 'https://cdn.jsdelivr.net/npm/markdown-text-editor/dist/markdown-text-editor.es.js';
  new MarkdownEditor('#markdown-editor');
</script>

<form action="/api/save" method="POST">
  <textarea id="markdown-editor" name="content"># Hello World</textarea>
  <button type="submit">Save Content</button>
</form>

<script src="https://cdn.jsdelivr.net/npm/markdown-text-editor"></script>
<script>
  new MarkdownEditor('#markdown-editor');
</script>

const editor = new MarkdownEditor('#markdown-editor', {
  placeholder: 'Write your markdown...',
  toolbar: ['heading', 'bold', 'italic', 'strikethrough', 'ul', 'ol', 'checklist', 'blockquote', 'link', 'preview'],
});

// Default — line, col, and chars visible
new MarkdownEditor('#editor');

// Disable the footer entirely
new MarkdownEditor('#editor', { footer: false });

// Hide only character count
new MarkdownEditor('#editor', { footer: { chars: false } });

// Hide line and column, keep character count
new MarkdownEditor('#editor', { footer: { line: false, col: false } });

// Show only line number
new MarkdownEditor('#editor', { footer: { col: false, chars: false } });

// Enable word count alongside the defaults
new MarkdownEditor('#editor', { footer: { words: true } });

// Show word count only
new MarkdownEditor('#editor', { footer: { line: false, col: false, chars: false, words: true } });

// Retrieve content via ID
const markdown = document.getElementById('markdown-editor').value;

// Set content via ID (The editor UI updates automatically)
document.getElementById('markdown-editor').value = "# New Heading Content";

const textarea = document.getElementById('markdown-editor');

// Retrieve content
const markdown = textarea.value;

// Set content (the editor UI reflects this immediately)
textarea.value = "## Updated via JS";

<!-- Recommended: set content server-side -->
<textarea id="markdown-editor"># Hello World</textarea>

const textarea = document.getElementById('markdown-editor');

// Read
const markdown = textarea.value;

// Update at runtime
textarea.value = '# New content';
editor.render();

const editor = new MarkdownEditor('#markdown-editor');

// Remove the editor and restore the plain textarea
editor.destroy();

const editor = new MarkdownEditor('#markdown-editor', {
    onChange(value) {
        console.log('Content changed:', value.length, 'characters');
    }
});

const DRAFT_KEY = 'my-page-draft';

// Restore saved draft before init (only if textarea starts empty)
const textarea = document.getElementById('markdown-editor');
const saved = localStorage.getItem(DRAFT_KEY);
if (saved && !textarea.value) textarea.value = saved;

// Save on every change
const editor = new MarkdownEditor('#markdown-editor', {
    onChange(value) {
        localStorage.setItem(DRAFT_KEY, value);
    }
});

// Clear draft after successful form submission
document.querySelector('form').addEventListener('submit', () => {
    localStorage.removeItem(DRAFT_KEY);
});

<form method="POST" action="/api/submit">
  <textarea id="markdown-editor" name="content" class="h-48" rows="5">
    # Initial Content
  </textarea>

  <button type="submit">Submit to Server</button>
</form>

<script>
  // Just initialize it. That's it.
  new MarkdownEditor('#markdown-editor');
</script>

const options = {
  placeholder: 'Start writing...',
  toolbar: [
    'link',
    {
      image: {
        fileInput: {
            accept: ['webp', 'avif'], // restrict the image upload format
            uploadUrl: '/api/upload', // Your upload endpoint
            params: {
                _token: 'your_csrf_token_here', // Essential for Laravel/Django
                folder: 'blog_posts'
            }
        },
        // Supports boolean: true/false OR object: { required: true }
        altInput: { required: true }
      }
    },
    'preview'
  ],
}
const editor = new MarkdownEditor('#markdown-editor', options);

{
  "success": true,
  "image_path": "https://cdn.yourdomain.com/uploads/image.webp"
}

// Alt text is REQUIRED by default
image: {
  fileInput: { uploadUrl: '/api/upload' }
}

image: {
  altInput: false // Users can now skip the alt text field
}

image: {
    altInput: {
        required: false // Disables alt text validation — users can skip the alt field
    }
}

const options = {
  toolbar: [
    'link',
    'image',
    'preview'
  ],
}
const editor = new MarkdownEditor('#markdown-editor', options);

// Default initialization (Plain Mode)
new MarkdownEditor('#markdown-editor');

// Explicit Plain Mode
new MarkdownEditor('#markdown-editor', {
    mode: 'plain'
});

// Hybrid (Visual) Mode
new MarkdownEditor('#markdown-editor', {
    mode: 'hybrid'
});

<html data-theme="dark">
  ...
  <textarea id="markdown-editor"></textarea>
  <script>
    new MarkdownEditor('#markdown-editor'); // picks up dark automatically
  </script>

<textarea id="markdown-editor" data-theme="dark"></textarea>
<script>
  new MarkdownEditor('#markdown-editor');
</script>

new MarkdownEditor('#markdown-editor', {
    theme: 'dark'
});

/* Override individual variables */
.markdown-editor-wrapper {
    --color-primary: oklch(60% 0.2 30);   /* orange accent */
    --border-radius: 0.5rem;
}

/* Or define a full custom theme */
[data-theme="brand"] .markdown-editor-wrapper,
.markdown-editor-wrapper[data-theme="brand"] {
    --color-base:       oklch(15% 0.01 250);
    --color-on-base:    oklch(95% 0 0);
    --color-primary:    oklch(65% 0.22 145);   /* green */
    --color-on-primary: oklch(10% 0 0);
    --color-accent:     oklch(75% 0.18 60);
    --color-neutral:    oklch(80% 0 0);
    --border-radius:    0.75rem;
}

const editor = new MarkdownEditor('#markdown-editor', {
    mode: 'hybrid',
    placeholder: 'Start writing...',
    footer: {
        line: true,
        col: true,
        chars: true,
        words: true,
    },
    onChange(value) {
        console.log('Content updated:', value.length, 'characters');
    },
    toolbar: [
        'heading', 'bold', 'italic', 'strikethrough', 'blockquote',
        'ul', 'ol', 'checklist',
        'code', 'codeblock', 'hr', 'table',
        {
            image: {
                fileInput: {
                    accept: ['webp', 'avif', 'png'],
                    uploadUrl: '/api/upload'
                }
            }
        },
        'link', 'undo', 'redo', 'indent', 'outdent', 'preview'
    ],
});

// Read content natively
const markdown = document.getElementById('markdown-editor').value;

// Update content programmatically (dispatch input to keep preview in sync)
// const ta = document.getElementById('markdown-editor');
// ta.value = '# New content';
// ta.dispatchEvent(new Event('input', { bubbles: true }));

// destroy() when the view unmounts (SPAs)
// editor.destroy();