These are the known mistakes in the second edition of the book. For errata in the first edition, see this page.
Page 4: The sentence “You can probably imagine how how tedious…” duplicates the word how.
Page 159 (The Date Type):
findDate function produces the wrong months. The
second argument given to
new Date should
Number(match) - 1, subtracting one to compensate
for the fact that months start at zero in this interface.
Page 185 (Slow-Loading Modules): In the code
define, the second use of
every method is incorrect. The call should be
Page 242 (Mouse Motion): The example
event.which to detect mouse button release. This
only works in Chrome and Safari. See
the updated code
and comment for a better
Page 281 (Curves): The text refers to
bezierCurve method. This method is actually
bezierCurveTo (as in the example code).
Page 282 (Curves): Where it says the picture shows a line from the left of the circle to the left of the quarter circle, it should definitely say right in both instances.