Errata

In chapter 3.3.2 (I guess), Prototype Cloning, I read the code:

switch1.isOn.isShared = true;

ok(!switch2.isShared,
'Methods are copied for each instance, not shared.'
);

IMHO, the correct, expected test is: ok(!switch2.*isOn*.isShared,
And the conclusion I reached when experimenting with node.js is the
contrary: *Methods are shared*.

In Ch4 4 when running Grunt to automate the build, I am seeing:

c:\Node\guestlist>grunt
Warning: Task "lint browserify qunit" not found. Use --force to continue.

Aborted due to warnings.


I have double checked the code but cannot locate the issue? (If forced it also errors)

in Chapter 1, I found a broken link. The Underscores.js library has a custom URL now rather than a Github Pages url.

The link points to: http://documentcloud.github.io/underscore/

Should point to: http://underscorejs.org/

There's an unnecessary line because the same object is assigned.

-----
var lightbulb = {
...
lightswitch = document.getElementById('lightswitch');

lightswitch = document.getElementById('lightswitch'); // This line.
lightswitch.addEventListener('click',
...
-----

The line

lightswitch = document.getElementById('lightswitch');

was doubled in the code snippet and should only appear once.

We say that we can fix the fact that the event listener gets called with a different context by using bind. The example given is of binding "lightbulb" to the toggle function which is declared in the global scope but the actual function assigned to the click handler is the member function lightbulb.toggle (the member function) instead of the global "toggle" function to which we have bound the lightbulb object.

Fix would be to pass simply "toggle" to the add listener event.

In the example code under "Named Parameters" from Ch.2, line 14:
"name: email || userProto.email,"
should be:
"email: email || userProto.email,"

otherwise, "name:" is a duplicate key from the line immediately preceding it (line 13).

Grunt did not work as planned, even if manually installing and running browserify (so public/app.js becomes 9395 lines of code) I am still seeing failing tests.

It would be extremely useful if up to date code examples could be provided for this book?

Thanks