Refer to nested HTML elements with jQuery

Refer to nested HTML elements with jQuery - javascript

I have some extensive HTML element in the following (simplified) format:
<div id="firstdiv" class="container">
<ul>
<li id="4"> <a title="ID:4">Tree</a>
<ul>
<li id="005"> <a title="ID:005">Leaf Tree</a>
<ul>
<li id="10"> <a title="ID:10">Fruit Tree</a>
<ul>
<li id="0050338"> <a title="ID:0050338">Apple Tree</a>
<ul>
<li id="399"> <a title="ID:399">Green Apple Tree</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li id="005"> <a title="ID:005">Conifer</a>
<ul>
<li id="10"> <a title="ID:10">Pine Tree</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
I want to access the value of the title attributes of all a-tags inside the div-container with the id="firstdiv" on click.
I tried the following jQuery function but it didn't work:
$("#firstdiv").children("a").on('click', function () { /*some code here*/ });
Any ideas what I'm doing wrong?

children() only goes one deep try find()
$("#firstdiv").on('click', function () {
$(this).find('a').each(function(){
console.log($(this).attr('title'))
})
});
will get all a tags titles when the #first_div is clicked
$("#firstdiv a").on('click', function () {
console.log($(this).attr('title'))
});
will get the title of the a tag you clicked on

children() does what it says, looks at child nodes only - not descendant nodes also. For that, you need find(). However, you need neither in your case, just a change to your selector.
$('#firstdiv a')
As with CSS, a space in the selector denotes a child OR descendant.

According to the jQuery documentation
The .children() method differs from .find() in that .children() only
travels a single level down the DOM tree while .find() can traverse
down multiple levels to select descendant elements (grandchildren,
etc.) as well
So change your selector to:
$("#firstdiv").find("a").on("click", function () {});
This will search everything beneath #firstdiv in your DOM tree.

Or even:
$('#firstdiv a').click(function(){
... do stuff
});
That will select all 'a' elements within #firstdiv

Try this http://jsfiddle.net/ApfJz/22/
$("#firstdiv a").on('click', function () { alert($(this).attr('title')); });

Demo
$(document).ready(function() {
$('#firstdiv a').click(function(){
alert($(this).attr('title'))
});
});

$("#firstdiv").find("a").on('click', function () {
});

Related

How can I select the first specific inner element?

Here is my HTML?
<ul>
<li>
<a href="./link1">
<div>something</div>
<span>link</span>
</a>
</li>
</ul>
And this is my jQuery code:
$('li').on('click', function(){
var link = $(this).find('a').attr('href');
})
As you see, there is two <a> tags. And .find() refersh to both of them. While I just want to select the <a> which is right inside (one level) in the <li> tag. So expected result is ./link.
What alternative should I use instead of .find() ?

You can use the direct descendant selector.
$('li').on('click', function(){ var link = $(this).find('> a').attr('href'); })

Try with eq(0) .It will get the first a tag
Or
Do with first('a')
$(this).children().first('a').attr('href')
$('li').click(function(){
console.log($(this).children('a').eq(0).attr('href'))
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>click
<a href="./link1">
<div>something</div>
<span>link</span>
</a>
</li>
</ul>

Method 1: Using Jquery's children and first
$('#myList').on('click', function() {
var link = $('#myList').children('a').first();
console.log(link.attr('href'));
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<ul>
<li id="myList">
<a href="./link1">
<div>something</div>
<span>link</span>
</a>
</li>
</ul>
Method 2: Using the immediate children selector >
$('#myList').on('click', function() {
var link = $('li > a:first');
console.log(link.attr("href"));
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<ul>
<li id="myList">
<a href="./link1">
<div>something</div>
<span>link</span>
</a>
</li>
</ul>

the first specific element
What alternative should I use instead of .find() ?
$(this).find('a:first')
seems like only logical solution and easy to read by developer

Don't do so. How is the browser meant to know which link to follow? It'd be invalid HTML
I suggest you using this instead:
startmiddleend
As you can see start and end are linked to page1 but the middle points to page2.

jquery, move element to closest div

I want to move some span elements to closest div. I found the solution to my problem but it does not work for me. I have some Html code:
<ul>
<li>
<a><span>Some info</span></a>
</li>
<div class="cl1">...</div>
<li>
<a><span>Some info 2</span><a>
</li>
<div class="cl1">
...
</div>
...
</ul>
and to move <span> like this:
$('span').each(function () {
$(this).parent().parent().closest('.cl1').append(this);
})
but nothing happened. Any help would certainly be appreciated

you can't put a div in a ul, only li's.
your html has to be valid (a's, ul need to be closed)
Closest searches anscetors, not siblings.
since your markup is not valid as is, i'm not sure if you want the divs in the list or not. This example removes them from the lis, which breaks the list into two lists.
$('button').click(function() {
$('span').each(function() {
var $div = $(this).closest('ul').siblings('.cl1');
$(this).clone().appendTo($div);
$(this).remove();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>
<a><span>Some info</span></a>
</li>
</ul>
<div class="cl1">...</div>
<ul>
<li>
<a><span>Some info 2</span></a>
</li>
</ul>
<div class="cl1">...</div>
<button>Do Stuff</button>

Dynamic heading text based upon selected link

I have a portfolio site set up and I have my portfolio set up to shuffle through by selecting certain filters. What I want to do is set some header text, based upon which filter they choose.
The issues is when I select a link, let's say advertising, Advertising will show up as my header text. However if I select something else, say branding, it doesn't change, it stays at advertising.
here is my html
<div id="portfolio-filter-container">
<h2 class="workFilterSelect">FILTER OPTIONS: <span class="currentFilter">ALL</span></h2>
</div>
<ul id="portfolio-filter">
<!--<li class="workFilterSelect">FILTER OPTIONS:</li>-->
<li class="workFilterButtons">All</li>
<li class="workFilterButtons">Advertising</li>
<li class="workFilterButtons">Branding</li>
<li class="workFilterButtons">Catalog</li>
<li class="workFilterButtons">Corporate ID</li>
<li class="workFilterButtons">Consumer Relations</li>
<li class="workFilterButtons">Incentive/Loyalty</li>
<li class="workFilterButtons">Packaging</li>
<li class="workFilterButtons">Product Launch</li>
<li class="workFilterButtons">Promotion</li>
<li class="workFilterButtons">Public Relations</li>
<li class="workFilterButtons">Sales Support</li>
<li class="workFilterButtons">Social Media</li>
<li class="workFilterButtons">Tradeshows</li>
<li class="workFilterButtons">Web/Mobile</li>
</ul>
<div id="bottomWrapper">
and here is my script
$(document).ready(function(){
$(".workFilterButtons a").click(function(){
$(".currentFilter").replaceWith($(this).append());
});
});
by default the page is set to "ALL" when loaded, but as you can see I am trying to gett he dynamic text to work within the .currentFilter span
Any help would be greatly appreciated.

If you only want text you use text() method to both get and set. Also you don't want to replace the element or it won't be found again because it will no longer exist
Try
$(".workFilterButtons a").click(function(){
$(".currentFilter").text($(this).text());
});

You don't need to replace the element with the clicked <a> element (unless you really want to), all you need to do is update the text:
$(document).ready(function () {
$(".workFilterButtons a").click(function () {
// selecting the element with the class
// of 'currentFilter', and setting its
// text (using the text() method) to
// the textContent of the clicked <a>
// element:
$(".currentFilter").text(this.textContent);
});
});
$(document).ready(function() {
$(".workFilterButtons a").click(function() {
$(".currentFilter").text(this.textContent);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="portfolio-filter-container">
<h2 class="workFilterSelect">FILTER OPTIONS: <span class="currentFilter">ALL</span></h2>
</div>
<ul id="portfolio-filter">
<!--<li class="workFilterSelect">FILTER OPTIONS:</li>-->
<li class="workFilterButtons">All
</li>
<li class="workFilterButtons">Advertising
</li>
<li class="workFilterButtons">Branding
</li>
<li class="workFilterButtons">Catalog
</li>
<li class="workFilterButtons">Corporate ID
</li>
<li class="workFilterButtons">Consumer Relations
</li>
<li class="workFilterButtons">Incentive/Loyalty
</li>
<li class="workFilterButtons">Packaging
</li>
<li class="workFilterButtons">Product Launch
</li>
<li class="workFilterButtons">Promotion
</li>
<li class="workFilterButtons">Public Relations
</li>
<li class="workFilterButtons">Sales Support
</li>
<li class="workFilterButtons">Social Media
</li>
<li class="workFilterButtons">Tradeshows
</li>
<li class="workFilterButtons">Web/Mobile
</li>
</ul>
<div id="bottomWrapper"></div>
JS Fiddle demo.
Incidentally, the reason your original code didn't work, and couldn't work, is because of this line:
$(".currentFilter").replaceWith($(this).append());
This replaced the selected element(s) with the clicked <a> element, which meant that, in future, the there was no .currentFilter element to replace or update.
On the other hand, if you want to put the clicked <a> element into the .currentFilter span-element, then you could try the following approach:
$(document).ready(function () {
$(".workFilterButtons a").click(function () {
// finding those <li> elements whose text, when trimmed
// (removing leading and trailing white-space) is equal
// to an empty string (''):
var emptyLi = $('.workFilterButtons').filter(function () {
return $(this).text().trim() === '';
}),
// caching the '.currentFilter' element(s):
currentFilter = $('.currentFilter'),
// checking for those elements in the
// currentFilter jQuery object that have
// a descendant <a> element, and finding
// length of that collection, and then
// checking that it's greater than 0:
hasA = currentFilter.has('a').length > 0;
// appending the contents of the currentFilter
// element into the found emptyLi element:
emptyLi.append(currentFilter.contents());
// if there are no <a> elements in the
// currentFilter element(s):
if (!hasA) {
// we replace the contents (textNode 'all')
// with the clicked <a> element:
currentFilter.contents().replaceWith(this);
} else {
// otherwise we append the clicked link to
// the currentFilter; this works because
// once we get to this stage the <a> element
// if it exists has already been moved back
// to the empty <li>, therefore we can't
// use '.contents().replace()' because
// there are no contents remaining by this point
// (and yes, this was incredibly counter-intuitive
// to me for quite a long time, which is why this
// update took a while):
currentFilter.append(this);
}
});
});
$(document).ready(function() {
$(".workFilterButtons a").click(function() {
var emptyLi = $('.workFilterButtons').filter(function() {
return $(this).text().trim() === '';
}),
currentFilter = $('.currentFilter'),
hasA = currentFilter.has('a').length > 0;
emptyLi.append(currentFilter.contents());
if (!hasA) {
currentFilter.contents().replaceWith(this);
} else {
currentFilter.append(this);
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="portfolio-filter-container">
<h2 class="workFilterSelect">FILTER OPTIONS: <span class="currentFilter">ALL</span></h2>
</div>
<ul id="portfolio-filter">
<!--<li class="workFilterSelect">FILTER OPTIONS:</li>-->
<li class="workFilterButtons">All
</li>
<li class="workFilterButtons">Advertising
</li>
<li class="workFilterButtons">Branding
</li>
<li class="workFilterButtons">Catalog
</li>
<li class="workFilterButtons">Corporate ID
</li>
<li class="workFilterButtons">Consumer Relations
</li>
<li class="workFilterButtons">Incentive/Loyalty
</li>
<li class="workFilterButtons">Packaging
</li>
<li class="workFilterButtons">Product Launch
</li>
<li class="workFilterButtons">Promotion
</li>
<li class="workFilterButtons">Public Relations
</li>
<li class="workFilterButtons">Sales Support
</li>
<li class="workFilterButtons">Social Media
</li>
<li class="workFilterButtons">Tradeshows
</li>
<li class="workFilterButtons">Web/Mobile
</li>
</ul>
<div id="bottomWrapper"></div>
JS Fiddle demo.
References:
JavaScript:
Node.textContent.
String.prototype.trim().
jQuery:
append().
click().
contents().
filter().
has().
replaceWith().
text().

I changed your class="currentFilter" to id="currentFilter" so now you won't need a .each() to do what you want to do, the selector selects only 1 element and not an array of 1 element.
Also changed replaceWith() with text(), and likewise append() replaced with text().
Here's a fiddle if you want to see it in action
https://jsfiddle.net/s6bpwycn/

get descent li anchor tag text using jquery

I have markup of ul and li. what I need to do is get text value from direct descentc li a text only. Expected result is a,b,c. fiddle
jquery
$(function(){
$('ul').first().find(' > li').each(function(){
alert($('a',this).text())
})
})
HTML
<ul>
<li><a>a</a>
<ul>
<li><a>a1</a></li>
<li><a>a2</a></li>
</ul>
</li>
<li><a>b</a></li>
<li><a>c</a></li>
</ul>

Use .children() instead which travels a single level down the DOM tree. Created a snippet for you:
$(function() {
$('ul').first().children('li').each(function() {
alert($(this).children('a').text())
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li><a>a</a>
<ul>
<li><a>a1</a>
</li>
<li><a>a2</a>
</li>
</ul>
</li>
<li><a>b</a>
</li>
<li><a>c</a>
</li>
</ul>

iterate parent li using each function jquery

This is my test HTML code:
<ul class="content">
<li class="data">
test1
<ul>
<li class="data">t1</li>
<li class="data">t2</li>
</ul>
</li>
<li class="data">
test2
<ul>
<li class="data">t3</li>
</ul>
</li>
<li class="data">
test3
<ul>
<li class="data">t4</li>
</ul>
</li>
jquery code is:
$(".content li").each(function(index, element) {
console.log(element);
});
In this function, all the li lists having class 'data' under the main ul.
But I need to iterate only the 3 parent li lists. How can I modify this jquery?
Kindly help me :)

Try to use child selecter > like,
$(".content > li").each(function(index, element) {
console.log(element);
});

in your jquery selector, add a > between .content and li..
$(".content > li").each(function (index, element) {
console.log(element);
});
> looks for immediate child instead of all childs

You can even use .children like bellow
$(".content").children('li').each(function(index, element) {
console.log(element);
});
DEMO

Develop Reference

JavaScript is the programming language of the Web.

Refer to nested HTML elements with jQuery - javascript

children() does what it says, looks at child nodes only - not descendant nodes also. For that, you need find(). However, you need neither in your case, just a change to your selector. $('#firstdiv a') As with CSS, a space in the selector denotes a child OR descendant.

Or even: $('#firstdiv a').click(function(){ ... do stuff }); That will select all 'a' elements within #firstdiv

Try this http://jsfiddle.net/ApfJz/22/ $("#firstdiv a").on('click', function () { alert($(this).attr('title')); });

Demo $(document).ready(function() { $('#firstdiv a').click(function(){ alert($(this).attr('title')) }); });

$("#firstdiv").find("a").on('click', function () { });

Related

How can I select the first specific inner element?

jquery, move element to closest div

Dynamic heading text based upon selected link

get descent li anchor tag text using jquery

iterate parent li using each function jquery

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