there's a feature like that?
Yes!
how?
Also shows the manga or chapter you already read! Omoo I love this site
Once you're done reading, you can scroll down and find a comment box. Below the title box, you can see a button that says 'contains spoiler' and it will automatically leave space as for other readers not to read it I they don't like spoilers.
mangago, your features are improving! A button to use if the comment was a spoiler... Yaaaaaas