3 ms·Some popular invisible characters are space, tab, and newline.by lisivka 10y agoSome popular invisible characters are space, tab, and newline.anoother 10y agoNone of which are invisible in the same sense as those covered in the article...lisivka 10y agoI am responding to parent comment, not to the article. Spaces, tabs, and newlines can be used to alter code in invisible way.