Develop Reference

How to write a document.querySelector for the following code

I'm having difficulty writing the document.querySelector for the following code. Currently I've written this code as querySelector but it does not encompass everything...
Please help me improve this, thank you.
Edit: as there seemed to be some confusion, let me elaborate. I would like all the elements, from div, a, img, everything to be encompassed in the querySelector.
var areaa = document.querySelector("#menu #envelope #links");
<div id="menu">Click here to browse the internet.
<div id="envelope">
<div id="links" >
<div>
<a id="g" class="redirect">
<img id="google" src="assets/google.png" />
</a>
</div>
<div style="width: 20%;"></div>
<div>
<a id="s" class="redirect">
<img id="sava" src="assets/Logo_Sava.png"/>
</a>
</div>
</div>
</div>
</div>
Edit 2 - as more code was required (the href elements are removed / added as needed)...
var menu = document.getElementById("menu");
var areaa = document.querySelectorAll(".areaa");
menu.addEventListener("mouseenter", addHref);
//areaa.addEventListener("mouseleave", remHref);
document.addEventListener("mousemove", function(){
if(this != areaa){
remHref();
}
});
menu.addEventListener("click", addHref);
document.addEventListener("click", function (){
if (this != areaa){
remHref();
}
});
var g = document.getElementById("g");
var s = document.getElementById("s");
function remHref (){
if (g.hasAttribute("href")){
g.removeAttribute("href");
}
if (s.hasAttribute("href")){
s.removeAttribute("href");
}
}
function addHref (){
setTimeout(activate, 250);
}
function activate (){
document.getElementById("g").setAttribute("href", "https://www.google.com");
document.getElementById("s").setAttribute("href", "https://www.example.com");
}

you might want to add a class to all elements you want to be captured, then use document.querySelectorAll
var areaa = document.querySelectorAll(".my-class");
html shoud look like this:
<div id="menu" class="my-class">Click here to browse the internet.
<div id="envelope" class="my-class">
<div id="links" class="my-class">
<div>
<a id="g" class="redirect">
<img class="my-class" id="google" src="assets/google.png" />
</a>
</div>
<div style="width: 20%;"></div>
<div>
<a id="s" class="redirect">
<img id="sava" src="assets/Logo_Sava.png"/>
</a>
</div>
</div>
</div>

If you want to select everything you can use the below:
var areaa = document.querySelectorAll("#menu #envelope #links *");
If you want to be more specific you can do the following (the code below will select all of the anchor tags and images inside #links):
var areaa = document.querySelectorAll("#menu #envelope #links a, #menu #envelope #links img");

You can use querySelectorAll
The Document method querySelectorAll() returns a static (not live) NodeList representing a list of the document's elements that match the specified group of selectors.
Learn more: https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll
You can use it like this:
var areaa = document.querySelectorAll('*');
This will return all items.
You can replace document with the container if you want to restrict this to a specific div.

2 things, either add a class to every div
<div id="menu" class="area">Click here to browse the internet.
<div id="envelope" class="area">
<div id="links" class="area" >
<div>
<a id="g" class="redirect">
<img id="google" src="assets/google.png" />
</a>
</div>
<div style="width: 20%;"></div>
<div>
<a id="s" class="redirect">
<img id="sava" src="assets/Logo_Sava.png"/>
</a>
</div>
</div>
</div>
</div>
and select all divs by
let areaa = getElementsByClassName("area");
or you can use document.querySelectorAll("yourclassname") to access all divs of that class name

DOM traversing using jQuery

I am trying to create a comparison overlay that shows items selected by users when they 'add to compare' link.(like one in flipkart that appears on top when you hit add to compare). Here is my code:
<div class="college-list-container">
<div class = "individual-college-container" id="text1">
<div class="image-header"><h3>text1</h3>
</div>
<div class="dark-overlay">
<div class="overlay-links" style=" float:left;"> <div class="absolute-center ">Details</div></div>
<a href=""> <div class="overlay-links" style=" float:right; border-right:none;"> <div class="absolute-center comparison" id="comparison">Add to compare</div>
</div></a>
</div>
</div>
<div class = "individual-college-container">
<div class="image-header"><h3>text2</h3>
</div>
<div class="dark-overlay">
<div class="overlay-links" style=" float:left;"> <div class="absolute-center ">Details</div></div>
<a href=""> <div class="overlay-links" style=" float:right; border-right:none;"> <div class="absolute-center comparison">Add to compare</div>
</div></a>
</div>
</div>
<div class = "individual-college-container" id="itm">
<div class="image-header" ><h3>text3</h3>
</div>
<div class="dark-overlay">
<div class="overlay-links" style=" float:left;"> <div class="absolute-center ">Details</div></div>
<a href=""> <div class="overlay-links" style=" float:right; border-right:none;"> <div class="absolute-center comparison">Add to compare</div>
</div></a>
</div>
Javascript
/show overlay when one checkbox is checked and add its name/image to the empty space
$('.comparison').click(function(e){
var clgId = $(this).parentsUntil('.individual-clg-container').find('.image-header').text();
e.preventDefault();
var clg = $("<li></li>")
clg.text(clgId);
var removeLink = $("<a href=''>(Remove)</a>");
clg.append(removeLink)
$('.comparison-colleges').append(clg);
$('.add-to-compare-overlay').show("slide", { direction: "up" }, 300);
});
I want the text in the div containing class 'image-header' to be assigned to the variable clgId. The problem that i am facing with my code is that it is adding the text of all the divs containing class 'image-header'. Ex i want the value text1 to be assigned on clicking add to compare of the div with id text1. However it assigns 'text1 text2 text3' to clgId.
Please help

I've created a JSFiddle with what I think is your desired functionality (I included a console log output in the script of the clgId variable):
http://jsfiddle.net/py38kuvv/
I replaced the parentsUntil function with the closest function (and replaced the individual-clg-container class selector):
var clgId = $(e.target).closest('.individual-college-container').find('.image-header').text();
and also updated your click handler:
$('.comparison').on( "click", function(e) {
In order to get a quicker response in future, posting a JSFiddle of what you have so far makes it easier for others to help :)

It is adding all of them because
var clgId = $(this).parentsUntil('.individual-clg-container').find('.image-header').text();
should be
var clgId = $(this).parentsUntil('.individual-college-container').find('.image-header').text();

jquery: how to append DOM element to selector within variable containing other DOM elements

When storing DOM elements in a javascript variable prior to appending them to the actual DOM is there a way with jQuery to select elements inside the variable?
For example,
I have a list of tweets on my page. Every time I click a refresh button I append a new tweet to the list below.
I add the new tweet like follows:
new tweet
<li class="tweet normal-tweet" data-user-name="Dorothy">
<div class="image">
<img height="48" width="48" src="http://twitter.com/api/users/profile_image?screen_name=Dorothy" alt="" />
</div>
<div class="content">
<div class="user">
<a class="user-name" href="http://twitter.com/Dorothy" title="Dorothy">Dorothy</a>
<div class="full-name"></div>
</div>
<div class="text">Once in a lullaby</div>
<div class="time-stamp" data-time="1322631934000">1322631934000</div>
</div>
</li>
Inside each tweet on the page, not the new tweet yet, I use jQuery to append some elements.
I have:
var actionsMarkup =
"<div class='actions'>
<span class='favorite'>Favorite</span>
<span class='retweet'>Retweet</span>
<span class='reply'>Reply</span>
</div>";
and I append it to the element with the .content class
$(actionsMarkup).appendTo('#tweets .tweet .content');
Now, when I make a new tweet I do the following:
$(document).on('click', '.refresh', function() {
newTweet = $(<new tweet code from above>);
actionsMark = $(actionsMarkup);
$(newTweet.appendTo('#tweets');
I need to be able to append the actionsMark contents to the div with class .content. However, I can't just reapply my prior statement of
$(actionsMarkup).appendTo('#tweets .tweet .content');
because that puts the markup on all .content divs again, even if it is already there.
Is there a way for me to use selectors to access the DOM nodes in my newTweet variable before I append it to the document object?
I am thinking something like
$(actionsMarkup).appendTo( newTweet, '.content');
If there is no way with selectors to do this then what are some other quick ways?
List of Tweets and Tweet container
<ul id="tweets" class="normal-tweet show-promoted-tweets">
<li class="tweet promoted-tweet" data-user-name="Dorothy">
<div class="image">
<img height="48" width="48" src="http://twitter.com/api/users/profile_image?screen_name=Dorothy" alt="" />
</div>
<div class="content">
<div class="user">
<a class="user-name" href="http://twitter.com/Dorothy" title="Dorothy">Dorothy</a>
<div class="full-name">Dorothy</div>
</div>
<div class="text">Somewhere over the rainbow</div>
<div class="time-stamp" data-time="1322631934000">3 minutes ago</div>
</div>
</li>
<li class="tweet promoted-tweet" data-user-name="lion">
<div class="image">
<img height="48" width="48" src="http://twitter.com/api/users/profile_image?screen_name=lion" alt="" />
</div>
<div class="content">
<div class="user">
<a class="user-name" href="http://twitter.com/lion" title="lion">lion</a>
<div class="full-name">Lion</div>
</div>
<div class="text">Way up high,</div>
<div class="time-stamp" data-time="1322631934000">17 minutes ago</div>
</div>
</li>
<li class="tweet normal-tweet" data-user-name="scarecrow">
<div class="image">
<img height="48" width="48" src="http://twitter.com/api/users/profile_image?screen_name=scarecrow" alt="" />
</div>
<div class="content">
<div class="user">
<a class="user-name" href="http://twitter.com/scarecrow" title="scarecrow">scarecrow</a>
<div class="full-name">Scarecrow</div>
</div>
<div class="text">And the dreams that you dreamed of,</div>
<div class="time-stamp" data-time="1322631934000">32 minutes ago</div>
</div>
</li>
</ul>

You can use .last(), to select the last element after you append your new tweet, like below:
$(document).on('click', '.refresh', function() {
newTweet = $(<new tweet code from above>);
$(newTweet).appendTo('#tweets');
var actionsMarkup =
"<div class='actions'>
<span class='favorite'>Favorite</span>
<span class='retweet'>Retweet</span>
<span class='reply'>Reply</span>
</div>";
$("#tweets .tweet").last().find(".content").append(actionsMarkup);
});
if you insist to use appendTo(), you can try using :last-child:
$(actionsMarkup).appendTo('#tweets .tweet:last-child .content');

I was looking to see if you can do the same thing, found this question but the existing answer is not useful in my case as i would like to alter the element before adding.
You can create a new dom element in a variable with jQuery and do operations on it as if it is already in the dom before appending it.
Example:
var newTweet = $('<div></div>');
newTweet.addClass('tweet');
newTweet.append('<span class="username"></span>');
newTweet.find('span.username').html('John Doe');
$('body').append(newTweet);
the following will be appended to the body:
<div class="tweet"><span class="username">John Doe</span></div>
Very handy if you are building a reusable interface element (like a dialogue box) with multiple options.

Can't seem to get element ID

I have a list of images and I really need to get ID of each image inside my JS, but I don't know how to do that. I've tried this method, but it is returning empty string instead of ID. I tried getting it from DOM elements http://galleria.aino.se/docs/1.2/references/dom/ like $(".galleria-thumbnails img").click(function(){alert((this).id)}); but this method is not working, alert is simply not showing up. Also I did some research here http://galleria.aino.se/docs/1.2/api/methods/ and got this code, but this is showing alert of empty string.
$("#gallery").galleria({
});
myGalleria = Galleria.get(0);
myGalleria.$('thumbnails').click(function(){
alert((this).id);
});
gallery div
<div id="gallery">
<img id="someid" src="http://photoapproaches.files.wordpress.com/2010/03/helen-model-2272.jpg" />
<img id="otherid" src="http://leandrovieira.com/projects/jquery/lightbox/photos/image1.jpg" />
</div>
Console is empty of errors, nothing is showing in console. Also this markup is working fine the gallery plugin is making DOM elements on their own, and that is very frustrating with this situation. DOM structure can be viewed here, but I will link it in here as well http://galleria.aino.se/docs/1.2/references/dom/
<div class="galleria-container">
<div class="galleria-stage">
<div class="galleria-images">
<div class="galleria-image">
<img>
</div>
<div class="galleria-image">
<img>
</div>
</div>
<div class="galleria-loader"></div>
<div class="galleria-counter">
<span class="current"></span>
<span class="total"></span>
</div>
<div class="galleria-image-nav">
<div class="galleria-image-right-nav"></div>
<div class="galleria-image-left-nav"></div>
</div>
</div>
<div class="galleria-thumbnails-container [ carousel ]">
<div class="galleria-thumb-nav-left [ disabled ]"></div>
<div class="galleria-thumbnails-list">
<div class="galleria-thumbnails">
<div class="galleria-image">
<img>
</div>
[...]
</div>
</div>
<div class="galleria-thumb-nav-right [ disabled ]"></div>
</div>
<div class="galleria-info">
<div class="galleria-info-text">
<div class="galleria-info-title"></div>
<div class="galleria-info-description"></div>
<div class="galleria-info-author"></div>
</div>
</div>
<div class="galleria-tooltip"></div>
</div>

Here is a one way to access id of an element:
var currentId = $(this).attr('id');
For your case, you can try this:
myGalleria.$('thumbnails').click(function(){
alert($(this).attr('id'));
});

should it not be alert($(this).id);? (Note the $).

javascript - textareas don't appear with correct cols

i've a little javascript that let me show and hide some textareas.
i start with 1 textarea shown and the other 4 hidden with property display:none;
the first textarea is shown correct, but when i run the javascipt to hide thhe first and show one of the other textareas, the cols property is not readed and the textarea is shown small.
Here is the js code:
<script language="javascript">
function collapser(tab_id) {
document.getElementById("new_page_content_it").style.display = "none";
document.getElementById("new_page_content_en").style.display = "none";
document.getElementById("new_page_content_fr").style.display = "none";
document.getElementById("new_page_content_es").style.display = "none";
document.getElementById("new_page_content_de").style.display = "none";
document.getElementById(tab_id).style.display = "block";
}
</script>
And here there is the html:
<div id="new_page_tab_container">
<a href="#" OnClick="javascript:collapser('new_page_content_it')">
<div id="new_page_tab_it">Italian</div>
</a>
<a href="#" OnClick="javascript:collapser('new_page_content_en')">
<div id="new_page_tab_en">English</div>
</a>
<a href="#" OnClick="javascript:collapser('new_page_content_fr')">
<div id="new_page_tab_fr">French</div>
</a>
<a href="#" OnClick="javascript:collapser('new_page_content_es')">
<div id="new_page_tab_es">Spanish</div>
</a>
<a href="#" OnClick="javascript:collapser('new_page_content_de')">
<div id="new_page_tab_de">German</div>
</a>
</div>
<div id="new_page_content_it">
<textarea name="content_it" id="content_it" cols="90" rows="40">italian</textarea>
</div>
<div id="new_page_content_en">
<textarea name="content_en" id="content_en" cols="90" rows="40">english</textarea>
</div>
<div id="new_page_content_fr">
<textarea name="content_fr" id="content_fr" cols="90" rows="40">french</textarea>
</div>
<div id="new_page_content_es">
<textarea name="content_es" id="content_es" cols="90" rows="40">spanish</textarea>
</div>
<div id="new_page_content_de">
<textarea name="content_de" id="content_de" cols="90" rows="40">german</textarea>
</div>
<div id="new_page_save">
<input type="submit" value="Salva"/>
</div>
The css define content_it visible but any other content_xx as display:none;
why the cols property is not readed? but most important... how to get rid of this problem?
Thanks!

As a start I would recommend you to validate your HTML. For instance you have div elements (block elements) inside anchor elements (inline elements) which is not valid. If you use Firefox I can recommend this HTML validator plugin:
http://users.skynet.be/mgueury/mozilla/