<!--element -->
<textarea id="content"></textarea>
<!-- call -->
<script>
$R('#content', {
imageUpload: '/your-upload-script/',
shortcutsAdd: {
'ctrl+., meta+.': { api: 'module.inline.format', args: 'sup' },
'ctrl+shift+o, meta+shift+o': { api: 'module.image.open' }
}
});
</script>