Sublime Text > Preferences > Package Settings > OmniMarkupPreviewer > Settings - Default
删除里面extensions的strikeout，renderer_options-MarkdownRenderer的配置需要下面这样才对
"renderer_options-MarkdownRenderer": {
"extensions": ["tables", "fenced_code", "codehilite"]
}
重启sublime, 搞定！可以在浏览器中实时预览