Ambiguous ampersands

1 · Mathias Bynens · Aug. 7, 2011, 12:22 p.m.
In this post, we’ll take a closer look at what happens if there’s an unencoded ampersand that’s not part of a character reference in your HTML code. Is it valid? Is it invalid? And what do “ambiguous ampersands” have to do with all this?...