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Why isn't my jQuery updating the DOM?

Ok, so I'm making a login screen for an application with a button that says "Not You?" which, when clicked, brings up a text-box to update the username on the screen. The issue I'm having is: the username updates once, but when tried again doesn't work. What's wrong with my jQuery?
Here's my jQuery:
var main = function(){
$('.not').click(function(){
$('.login-wrap').fadeOut(300, function(){
$('.not-you').fadeIn(300);
});
});
$('.enter').click(function(){
$('.name').replaceWith($('.new-input').val());
$('.not-you').fadeOut(300, function(){
$('.login-wrap').fadeIn(300);
});
});
}
$(document).ready(main);
And HERE'S a link to the CodePen.
Thanks!

From the docs, The .replaceWith() method removes content from the DOM and inserts new content in its place with a single call,so for first time it is working fine but when first time .replaceWith() is used it replaces whole '.new-input' with class 'name',that is why afterwards it is creates problems.
Instead of
$('.name').replaceWith($('.new-input').val());
Try
$('.name').html($('.new-input').val());
OR
$('.name').text($('.new-input').val());
see here.

When you are doing replaceWith(), you are actually removing the whole tag with class '.name'.
So in the next time the code is unable to find any object with class 'name'.
Use '.html()' to make it work.

You can change your replaceWith() line with the following:
$('.name').replaceWith("<span class='name'>"+$('.new-input').val()+"</span>");
replaceWith() actually replaces the whole DOM element that has the class of name.
.replaceWith() | jQuery API Documentation

Protractor find an element by tag inside a div

I've got a div in an HTML Page of which the name is always known and inside this div there is an href, the details of which are not known. It could be the direct child of the parent or it could be a further grandchild. Looks something like this:
<div class="divName">
...
some text
...
</div>
I know that there will only be one link within this div, so I want to find the one link and click it.
I've tried the following but it doesn't seem to be working:
element(by.classname('divName')).find('a').click();
Any ideas?

element(by.css('.divName a')).click();
Or the shorter notation:
$('.divName a').click();

figured out a solution:
ptor.findElement(protractor.By.className('clsName'))
.findElements(protractor.By.tagName('a'))
.then(function(links){
links[0].click();
//place expects here, otherwise it will run async and your expects will be hit
//before the lookup
});
This seems to work pretty well for my purposes

One line answer
try with element('.divName a').click();

it seems sytax error in your code
use this
element(by.className('divName')).find('a').click();

jQuery - Trouble adding a class to a hyperlink using 'each'

I have some Javascript that finds all of the hyperlinks in a page that contain 'google' for example and changes the beginning of the url to another url.
I am trying to add a class to this affected link, however I am getting a lot of 'undefined' errors in the JS console. I have tried alert($(this).innerHTML)) which showed the contents of the hyperlink - clases and whatnot. But for some reason I cannot append a class. I have also tried using this.className += " socks". That also causes an undefined error. I think I am missing something simple!
Also is there a way of using a regex in the search, I am newish to Javascript.
Here is my code:
$("a[href*='google']").each(function(){
this.href = this.href.replace('http://www.google.co.uk','http://www.ask.com');
this.href = this.href.replace('http://www.google.com','http://www.ask.com');
$(this).addClass("socks");
});
Thanks very much for any help!

There is no error with this code that i can see:
http://jsfiddle.net/p7Sgj/
See this.

try
$("a[href*='google']").each(function(){
var href = $(this).attr('href');
href.replace('http://www.google.co.uk','http://www.ask.com');
href.replace('http://www.google.com','http://www.ask.com');
$(this).attr('href', href);
$(this).addClass("socks");
});
instead of using this.href. I guess your code doesn't reach the addClass part...
Also, use firebug (in case of firefox) or chrome developer tools (in case of chrome) for debugging. You can simply set a breakpoint, add watches, etc...
(In that case, make sure you use a so-called non-minified version of jQuery for easier debugging)

If your HTML code is
Hello
World
And your CSS is
.socks {
color:#f00;
}
Then your code should be working fine.
http://jsfiddle.net/k93TZ/2/
Working here.
It might be your html or css code.

JQuery .attr won't retrieve or change values

I'm trying to change HTML attributes using jQuery, but no matter what I do, I can't get anything to work with jQuery's .attr().
For testing, I've written
alert($("#logo").attr("title"));
and even though I have an img with id="logo" and a title, the alert remains blank.
My full method:
function switchVideo(videoID) {
var videoPlayer = document.getElementById("example_video_1");
videoPlayer.src = "video/Occam.webm";
videoPlayer.load();
$("#example_video_1").attr("poster", "video/ss.png");
//Doesn't work:
alert($("#logo").attr("title"));
$("#logo").fadeOut();
videoPlayer.play();
}
My fade out works, so I know I imported jQuery correctly.
I've gotten it working in another document, so there must be something else in the document messing it up. Does anyone know why this simple method won't work?
You can see the source page at http://jrstrauss.net/temp/create.html

Your div has the id logo, not the img.
Try:
$("#logo img").attr("title")

You should be using $.fn.prop for that now: http://api.jquery.com/prop/

You should use prop if you are using a recent version of jQuery.

You can also try this according to your HTML:
alert( $("#logo a img").attr("title") );
Demo

You have the following markup with id logo
<div id="logo">
......
</div>
Now, you are trying to run jQuery's .attr method by following code.
$("#logo").attr("title");
as you may know .attr method retrieves attribute value of the given element but that <div> doesn't have a attribute named title. so to confirm this, try retrieving attribute that does exist, for example id. so try this
alert($("#logo").attr("id"));
This will return the value of attribute. the important thing to note is jQuery looks for attributes of given element only, It doesn't scan child elements.
So, to make it work in your case. You need to do the following
alert($("#logo img").attr("title"));
Hope it helps

Unexpected result of document.getElementById.value?

When I run the following code:
document.getElementById('somevar').value = '25';
alert(document.getElementById('somevar').value );
"somevar" is displayed, instead of 25. Why is this? Thanks in advance for any help.
EDIT: input type of 'somevar'is hidden

I suspect this is happening because when you run the code the element you're trying to access is not yet ready. Make sure you run your code after the DOM has loaded by using onload for plain javascript or the ready event if using jQuery.

As show on my fiddle, if an element is defined with the right name, it show the correct result:
http://jsfiddle.net/Achilleterzo/kcp2n/

It should work.
Here is a sample on JsFiddle