Looping through .find() results and gathering .text() - javascript

I've got the following code:
jQuery
$("li").click(function(){
$(this).toggleClass("selected");
$(".selected").each(function(){
$(".items").append(this.text() + ", ");
});
});
html
<ul class='category'>
<h4>Category</h4>
<li class="selected">Link 1</li>
<li>Link 2</li>
<li>Link 3</li>
<li class="selected">Link 4</li>
<li class="selected">Link 5</li>
<li>Link 6</li>
<li>Link 7</li>
</ul>
<span class="items">Selected Items Appear Here</span>
I'm trying to search the contents of the $(".category") for tags with the .selected class before appending the results to another div.
This is the result I'm hoping for:
<span class="items">Link 1, Link 4, Link 5</span>
However, the this.text() seems to be returning an undefined error.
Any clue as to what I'm doing wrong?


You need to call .text() on a jQuery object, and since this refers to the element (see jQuery docs for .each()), simply wrap this in $() to make a new jQuery object of the current element in the loop.
example:
$(".items").append($(this).text() + ", ");
in saying this, you'd probably be better off simply using .innerHTML unless you want the jQuery object for other reasons.
example:
$(".items").append(this.innerHTML + ", ");


You can try something like
var $lis = $(".category li").click(function() {
//toggle the current li's selected class
$(this).toggleClass("selected");
setItems();
});
//set the initial value
setItems();
function setItems() {
//get the texts of all selected `li`'s text to an array
var texts = $lis.filter(".selected").map(function() {
return $(this).text();
}).get();
//set the array values to the `.items` element
$('.items').text(texts.join())
}
.selected {
background-color: lightgrey;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<h4>Category</h4>
<ul class='category'>
<li class="selected">Link 1</li>
<li>Link 2</li>
<li>Link 3</li>
<li class="selected">Link 4</li>
<li class="selected">Link 5</li>
<li>Link 6</li>
<li>Link 7</li>
</ul>
<span class="items">Selected Items Appear Here</span>


js fiddle example for you
**Jquery**
$(function () {
$("li").click(function () {
$(this).toggleClass("selected");
appendItems();
});
function appendItems() {
var selecteditem = "", lement, appementElement = ", ";
lement = $(".selected").size();
$(".selected").each(function (index) {
if ((lement - 1) == index) {
appementElement = "";
}
selecteditem = selecteditem + ($(this).text() + appementElement);
});
$(".items").html("").append(selecteditem);
}
});
html
<ul class='category'>
<h4>
Category</h4>
<li class="selected">Link 1</li>
<li>Link 2</li>
<li>Link 3</li>
<li class="selected">Link 4</li>
<li class="selected">Link 5</li>
<li>Link 6</li>
<li>Link 7</li>
</ul>
<h3>
<span class="items"></span>
</h3>
i hope this may hep you


I think you confused Javascript's this with jQuery's $(this). $() is the jQuery constructor function. this is a reference to the DOM element of invocation.
Please find the working code below:
$("li").click(function(){
$(this).toggleClass("selected");
$(".selected").each(function(){
$(".items").append($(this).text() + ", ");
});
});
$(".selected").each(function(){
$(".items").append($(this).text() + ", ");
});
.selected{
background-color: yellow;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class='category'>
<h4>Category</h4>
<li class="selected">Link 1</li>
<li>Link 2</li>
<li>Link 3</li>
<li class="selected">Link 4</li>
<li class="selected">Link 5</li>
<li>Link 6</li>
<li>Link 7</li>
</ul>
<span class="items">Selected Items Appear Here</span>
Read up on this: jQuery $(this) vs Javascript this

Related

Change css class after given number of items inside div

I need to change css display value of items inside div using jQuery.
What I need to do is, get number of items inside the div element. (Ex- li elements).
If number of li elements inside the div is more than 6, I need to set display:none css value to them, while first 6 li items remain display:block
How can I do that?
I can get number of li elements inside div by using this code,
$(window).ready(function () {
var itemCount = 1;
if ($(window).width() < 768) {
if ($('#my-div li').length > 6) {
var k = $('#my-div li').length;
alert("no of items =" + k);
}
}
});
How can I achieve this?

You can use $('#my-div li').not(":lt(6)").hide() to show the first 6 li in your div.
Demo
$(window).ready(function() {
var itemCount = 1;
if (true) { // changed < to > for the example
if ($('#my-div li').length > 6) {
var k = $('#my-div li').length;
alert("no of items =" + k);
$('#my-div li').not(":lt(6)").hide()
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="my-div">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
</div>

Here you got a very easy way to show only the first 6 elements with slice() method, check this:
if($('#my-div > li').size() > 6){
$('#my-div > li').slice(6).hide()
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="my-div">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
</ul>

You can loop the list and hide it if the index is more than N.
Index start at 0
$('.container > li').each(function(i, e) {
if (i >= 6) { $(this).hide() }
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="container">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
</ul>

Another approach using jQuery selector :gt
$('#my-div li:gt(5)').hide(); //Index starts from 0 so 5 is 6
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<ul id="my-div">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
</ul>

$(document).ready(function(){
$("ul li:gt(5)").hide();
//List elements with an index > 5
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
</ul>

hiding list items and show new li on click, but now I always need to have an empty li to "hide" them all

I've got a script that checks an li list and will show the first, with every click it will show the next li.
The problem is with this script, I have to add an empty li to "hide" all of them, is there a way to work around this, with this script?
$('#test-div2 ul li').hide().filter(':lt(1)').show();
$('#hint-1').click(function(){
$eL = $('#test-div2 ul li').filter(":visible");
$("#test-div2 ul").find("#test-div2 ul li").hide().next().show();
if($eL.next().length>0){
$eL.next().show();
}
});
This is the html:
<ul>
<li></li>
<li>hint 1</li>
<li>hint 2</li>
<li>hint 3</li>
<li>hint 4</li>
<li>hint 5</li>
<li>hint 6</li>
<li>hint 7</li>
</ul>

How about just making the container div the thing to click to get a hint and cleaning up your JQuery a bit?
$('#hints li').hide();
$('#test-div2').click(function(){
$eL = $('#hints li').filter(":visible");
$("#hints li:first-child").show();
if($eL.next().length > 0){
$eL.next().show();
}
});
#test-div2 {
cursor:pointer;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="hints">
<li>hint 1</li>
<li>hint 2</li>
<li>hint 3</li>
<li>hint 4</li>
<li>hint 5</li>
<li>hint 6</li>
<li>hint 7</li>
</ul>
<div id="test-div2">Show hint</div>

is it possible, to add auto incremental classes to a list by using jquery or javascript

is it possible, to add auto incremental classes to a list
<ul id="list">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
<li>Element 4</li>
<li>Element 5</li>
</ul>
Now, If I hover on Element 3 then, add auto incremental classes to li like example below...
<ul id="list">
<li class="left2">Element 1</li>
<li class="left1">Element 2</li>
<li>Element 3</li>
<li class="right1">Element 4</li>
<li class="right2">Element 5</li>
</ul>
Again if hover on Element 1 then, add auto incremental classes to li like example below...
<ul id="list">
<li>Element 1</li>
<li class="right1">Element 2</li>
<li class="right2">Element 3</li>
<li class="right3">Element 4</li>
<li class="right4">Element 5</li>
</ul>
sorry about my poor English. Thank you.

$('li').hover(function() {
$('li').removeClass();
var next = $(this).nextAll();
next.each(function(i, v) {
$(this).addClass('right' + (i+1))
})
var prev = $(this).prevAll();
prev.each(function(i, v) {
$(this).addClass('left' + (i+1))
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="list">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
<li>Element 4</li>
<li>Element 5</li>
</ul>
Use .prevAll() and .nextAll()
Description: Get all preceding siblings of each element in the set of matched elements, optionally filtered by a selector.
Description: Get all following siblings of each element in the set of matched elements, optionally filtered by a selector.
then iterate on the li and assign the index. make sure to remove the li classes so it wont stack up

Based on example, I cleared all the class in <li> when mouseenter anyone of the <li> and add new class for them.
left1+n will add to previous all <li> and right1+n will add to next all <li>
$("#list > li").on("mouseenter", function(){
$("#list > li").attr("class", "");
$(this).prevAll("li").each(function(i) {
$(this).addClass('left' + (i+1));
});
$(this).nextAll("li").each(function(i) {
$(this).addClass('right' + (i+1));
});
});

Get id From Event Trigger

I have tried everything that I have found on Stack Overflow, but I cannot get this to work. Here is my code.
$(document).ready(function(){
$(".category, .submenu").mouseenter(function(){
var i = 0;
var id = "#category1" /*-- $(obj).attr("id"); */
if (id == "#category1") {i = 1};
$("#submenu" + i).toggleClass("submenuHover");
$("#category" + i).toggleClass("categoryHover");
});
$("#category1, #submenu1").mouseleave(function(){
$("#submenu1").toggleClass("submenuHover")
$("#category1").toggleClass("categoryHover");
});
$("#category2, #submenu2").mouseenter(function(){
$("#submenu2").toggleClass("submenuHover");
$("#category2").toggleClass("categoryHover");
});
$("#category2, #submenu2").mouseleave(function(){
$("#submenu2").toggleClass("submenuHover");
$("#category2").toggleClass("categoryHover");
});
});
<a id="category1" class="category" href="#">Category 1</a>
<div id="submenu1" class="submenu">
<div>
<b>Column 1</b>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
</ul>
</div>
<div>
<b>Column 2</b>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
</ul>
</div>
</div>
<a id="category2" class="category" href="#">Category 2</a>
<div id="submenu2" class="submenu">Submenu #2
<div>
<b>Column 1</b>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
</ul>
</div>
<div>
<b>Column 2</b>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
</ul>
</div>
</div>
line > var id = "#category1" /*-- $(obj).attr("id"); */
is where my problem is.
I have commented out $(obj).attr("id"); and added "#category1".
It works like this.
How do I get the id so I can condense this code into one block?
Also, this is still a work in progress so once I figure out this step I want to combine mouseenter and mouseleave to use the same value of i, and I don't know how to proceed with that part yet.

To get the id from the class that triggered the event:
$(".category, .submenu").mouseenter(function(){
var id = $(this).attr('id');
...
}
Next time make a JSFiddle but here's one I made for you, showing that it works.
https://jsfiddle.net/3yn4e0ng/
Look in the console for proof that it is getting your id.
Lastly, you're going to have issues with your comparison statements like these:
if (id == "#category1") {i = 1};
because jQuery doesn't return the (#) symbol. You're explicitely asking for the id so there's no reason for jQuery to pass back a # sign into the string, indicating that thisis an id.
Consider this instead:
if (id == "category1") {i = 1};
Note: There's no reason for you to use == over === unless your insecure about whether the id that jQuery fetches is of type string. Read this amazing post: Which equals operator (== vs ===) should be used in JavaScript comparisons?

you can do it like this:
var id = $(this).hasClass("category") ? $(this).attr("id") : $(this).closest(".submenu").prev("a").attr("id");
this is a working fiddle.

jquery onclick parent remove child action

Actually I'm really very sorry about my question, I'm not sure how to make attention or ask question about this kind of problem.
Please see my code 1st.
<div data-model="ABC123" id="product">Select a Product</div>
<ul id="lists">
<li data-product="P1">Product 1
<ul id="sublists">
<li data-item="it1">P1 Item 1</li>
<li data-item="it2">P1 Item 2</li>
<li data-item="it3">P1 Item 3</li>
<li data-item="it4">P1 Item 4</li>
</ul>
</li>
<li data-product="P2">Product 2
<ul>
<li data-item="it1">P2 Item 1</li>
<li data-item="it2">P2 Item 2</li>
<li data-item="it3">P2 Item 3</li>
<li data-item="it4">P2 Item 4</li>
</ul>
</li>
<li data-product="P3">Product 3</li>
<li data-product="P4">Product 4</li>
</ul>
<div id="codes">
<span class="code1"></span>
<span class="code2"></span>
<span class="code3"></span>
</div>
The jquery code is:
<script>$('#product').click(function () {
var pmodel = $(this).data('model');
$('.code1').empty().append(pmodel);
$('.code2').empty();
$('.code3').empty();
});
$('#lists li').click(function () {
var dmodel = $(this).data('product');
$('.code2').empty().append(dmodel);
});
$('#lists li ul li').click(function () {
var item = $(this).data('item');
$('.code3').empty().append(item);
});</script>
You may directly view this at http://codepen.io/alshedupur/pen/YqKGqV
Everything is work fine, but my problem is, when I trigger parent list item like: Product 1 / Product 2 / Product 3
In result I want to empty .code3 span
I try to use $('.code3').empty(); on 2nd action but if I use this, then 3rd action I mean sub list click function not work.
Please see my screenshot for clearly understand what I want:

You need to empty .code3 as well.
$('#product').click(function() {
var pmodel = $(this).data('model');
$('.code1').empty().append(pmodel);
$('.code2').empty();
$('.code3').empty();
});
$('#lists > li').click(function(e) {
e.stopPropagation();
var dmodel = $(this).data('product');
$('.code2').empty().append(dmodel);
$('.code3').empty();
});
$('#lists li ul li').click(function(e) {
e.stopPropagation();
var item = $(this).data('item');
var dmodel = $(this).parents("li").data('product');
$('.code2').empty().append(dmodel);
$('.code3').empty().append(item);
});
#product:hover,
li:hover {
cursor: pointer
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div data-model="ABC123" id="product">Select a Product</div>
<ul id="lists">
<li data-product="P1">Product 1
<ul id="sublists">
<li data-item="it1">P1 Item 1</li>
<li data-item="it2">P1 Item 2</li>
<li data-item="it3">P1 Item 3</li>
<li data-item="it4">P1 Item 4</li>
</ul>
</li>
<li data-product="P2">Product 2
<ul>
<li data-item="it1">P2 Item 1</li>
<li data-item="it2">P2 Item 2</li>
<li data-item="it3">P2 Item 3</li>
<li data-item="it4">P2 Item 4</li>
</ul>
</li>
<li data-product="P3">Product 3</li>
<li data-product="P4">Product 4</li>
</ul>
<div id="codes">
<span class="code1"></span>
<span class="code2"></span>
<span class="code3"></span>
</div>

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