Develop Reference

How to loop and set inner content of DOM elements in jQuery and JavaScript?

I'm trying to loop through divs and set the content of a div inside the outer div. I tried this.
Here is the HTML div's I want to loop through and I want to set the content of div with class content-detail with the value for its attribute data-form data.
//the javascript code I used is this
$(function($) {
for (var i of $(".item .content-detail")) {
var container = document.querySelector($(i)[0]);
var formData = $(i).attr("data-formdata");
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>
<div class="item">
<div class="down-div"> </div>
<div class="detail">
<h4>Detail</h4>
<div id="div_" class="content-detail" data-formdata="my Item">
</div>
<div class="text-center">
<button class="btn btn-blue center"> SET !</button>
</div>
</div>
</div>
<div class="item">
<div class="down-div"> </div>
<div class="detail">
<h4>Detail</h4>
<div id="div_" class="content-detail" data-formdata="my Item">
</div>
<div class="text-center">
<button class="btn btn-blue center"> SET !</button>
</div>
</div>
</div>
But am stuck at this point var container = document.querySelector($(i)[0]);
I don't know how to get the jquery selector of that current div to a variable.

This may need some tweaks, but it should be close...
$(function ($) {
$(".item .content-detail").each(function(index, element) {
element.text($(element).attr("data-formdata"))
})
});
Take a look at the .each() method

$(function($) {
for (var i of $(".item .content-detail")) {
//var container = document.querySelector($(i)[0]);
var container = i;
var formData = $(i).attr("data-formdata");
}
});
I just needed the element

If you want to set the content of each DIV, you don't need a for loop. The .text() method takes a callback function, and it will be called on each element that matches the selector. The returned value is used as the new content.
$(".item .content-detail").text(function() {
return $(this).data("formdata");
});

This works.
$(function($) {
$(".item .content-detail").text(function(){
return $(this).attr("data-formdata");
})
});

Can you not just use JS like this:
[UPDATED]
function test() {
var divs = document.getElementsByTagName("div");
for (var i = 0; i < divs.length; i++) {
var divsSub = divs[i].getElementById("div_").querySelectorAll(".content-detail");;
for (var iS = 0; iS < divsSub.length; iS++) {
var x = divsSub[iS].getAttribute("data-formdata");
divsSub[iS].innerHTML = x;
}
}
}

javascript if a html element text equal with 0, addClass to an element

I have an element that contains the discount of a product
<div class="discount_discountAmount">
<div id="mydiscouttext" class="discouttext">0
<span class="price_percent">%</span>
</div>
</div>
I want, if the element with id="mydiscouttext" equal to 0, addClass "hide".
I am looking for a solution with javascript.
Any idea?

I did something similar for another person, where I the table row had to be highlighted in the case of value in a cell being <=5. Please see if this helps you: https://codepen.io/nitinsuri/pen/WoqLzX
$(document).ready(function(){
$("table#book-list").find("td").each(function(){
var quantity = parseInt($.trim($(this).text()));
if(quantity <= 5){
$(this).parent("tr").addClass("low-quantity");
}
});
});

changes to:
<div class="discount_discountAmount">
<div id="mydiscouttext" class="discouttext">
<span class="value_percent">0</span>
<span class="price_percent">%</span>
</div>
</div>
and:
$(document).ready(function(){
var discouttext = $('#mydiscouttext span:first-child').html();
if(discouttext === '0')
$('.discount_discountAmount').hide();
});

if(!parseInt(document.querySelector("#mydiscouttext").innerText)){
document.querySelector("#mydiscouttext").style.display = "none";
}
this can be help

there, in plain Javascript,
var discount = document.getElementById('ammount').innerHTML;
console.log(discount);
if(parseInt(discount) <= 0 ) {
document.getElementsByClassName('discount_discountAmount')[0].classList.add("hide");
}
<div class="discount_discountAmount">
<div id="mydiscouttext" class="discouttext"><span id="ammount">0</span>
<span class="price_percent">%</span>
</div>
</div>
Also, i added a span to isolate the percentage amount. it's easy to deal with it then.

I would recommend to put it inside a span like the percent and try to put make a javascript like this
<div>
<span id="mydiscouttext">0</span>
<span>%</span>
</div>
<script>
$( document ).ready(function(){
var text = $("#mydiscouttext").html();
if(text == "0")
$("#mydiscouttext").hide();
});
</script>

jquery not getting class name of elements

I have the following code but for some reason jQuery does not pick the elements class name, I understand that if the element has more than one class calling .attr('class') won't return them but the .hasClass('class-name') should be able to identify if the element has the class name.
My problem is that jquery returns class name as undefined(I got this from the line commented.).
How can I make the all other div children of the #parent, that do not have class the-one to have a yellow background.
$(document).ready(function()
{
var j = $('#parent> div').size();
for(var i =0;i<j;i++)
{
//alert($('#parent> div').children().eq(i).attr('class'));
if(!$('#parent> div').children().eq(i).hasClass('the-one'))
{
$('#parent> div').children().eq(i).css('background','yellow')
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id = "parent">
<div class = "one the-one">one</div>
<div class = "two">two</div>
<div class = "three">Three</div>
<div class = "four">Four</div>
</div>

The children() call is redundant as none of the div elements have any child elements. Remove that and the code works:
$(document).ready(function() {
var j = $('#parent> div').size();
for (var i = 0; i < j; i++) {
//alert($('#parent> div').eq(i).attr('class'));
if (!$('#parent> div').eq(i).hasClass('the-one')) {
$('#parent> div').eq(i).css('background', 'yellow')
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="parent">
<div class="one the-one">one</div>
<div class="two">two</div>
<div class="three">Three</div>
<div class="four">Four</div>
</div>
Also note that you can tidy the logic in your JS using each() with the this keyword to reference the element in the loop:
$('#parent > div').each(function() {
if ($(this).hasClass('the-one'))
$(this).css('background', 'yellow')
});

The problem is $('#parent> div') returns the div children of #parent so calling children() again does not return any elements.
You can use a simple jQuery selector instead of a loop like
$(document).ready(function() {
$('#parent> div:not(.the-one)').css('background', 'yellow')
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="parent">
<div class="one the-one">one</div>
<div class="two">two</div>
<div class="three">Three</div>
<div class="four">Four</div>
</div>
But you can just use css for this, no need to use jQuery
#parent> div:not(.the-one) {
background: yellow;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="parent">
<div class="one the-one">one</div>
<div class="two">two</div>
<div class="three">Three</div>
<div class="four">Four</div>
</div>

$(document).ready(function() {
$('#parent > div').each(function(){
var classtheone = $(this).hasClass('the-one');
if(!classtheone){
$(this).css('background-color', 'yellow')
}
})
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id = "parent">
<div class = "one the-one">one</div>
<div class = "two">two</div>
<div class = "three">Three</div>
<div class = "four">Four</div>
</div>
Try this way

Why not try a simpler method?:
$("#parent > div").not(".the-one").css("background", "yellow");
More info about jQuery's .not method...

Try this
$("#parent div").each(function(){
var me=$(this);
if(me.hasClass("the-one")) { me.css({"background-color" : "yellow"}); }
})

As written already in other answers, your children() call is the problem, I suggest using the following solution with each() as it is simpler
$(document).ready(function()
{
$('#parent div').each(function( i ) {
if ( !$(this).hasClass('the-one')) {
$(this).css('background','yellow');
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id = "parent">
<div class = "one the-one">one</div>
<div class = "two">two</div>
<div class = "three">Three</div>
<div class = "four">Four</div>
</div>

Check Div Elements by name fast

I have some Divs:
<div id="content">
<div class="c" id="1">
<div id="xyz">dont care</div>
<div id="texts1">
<div name="check"> ContentText </div>
</div>
</div>
<div class="c" id="2">
<div id="xuyz">dont care</div>
<div id="texts2">
<div name="check"> ContentText </div>
</div>
</div>
</div>
I want to iterate through all elements of the "c" class.
Then I want to check, if the Div elements named "check" of each "c" element contains special text.
If true, then manipulate the "c" element (which contains the special text)
I tried something like this:
var ele = document.getElementsByClassName("c");
for(var i=0;i<ele.length;i++)
{
var check = ele[i].getElementsByName("check");
if(check.innerHTML ....)
}
But thats not working :/
Log from Firefox:
TypeError: ele[i].getElementsByName is not a function
Where is my mistake?

A simple querySelectorAll() should do the trick:
var check = document.querySelectorAll('.c [name="check"]');
And as stated in a comment already, only document has getElementsByName method.

With jQuery this is very simple -
$('[name="check"]:contains("your special text")')

With jQuery (you have tagged it with it as well)
$(document).ready(function () {
$('div.c').find('div[name="check"]').each(function(){
// here check HTML and do needed manipulations
if($(this).html() == 'ContentText'){
$(this).closest('div.c').children().first().html('I CARE');
}
});
});
see jSFiddle -> http://jsfiddle.net/ApfJz/32/

Here is a modification of your code to make it work as intended
var ele = document.getElementsByClassName("c");
for (var i = 0; i < ele.length; i++)
{
if (ele[i].getAttribute('name') === "check") {
// do something with matching elements here
}
}

Javascript finding parent or sibling

I have this html code:
<div class="comment" id="7" >
<div style="display:inline-block">
<img style="width:64px;height:64px" src="http://origin.black-marketplace.net/content/images/users/1.jpg"><br>
<div class="rating" style="background-position:0px -10px" title="1 stelle su 5"></div>
</div>
<div style="display:inline-block;float:right;width:172px;height:75px">
<b>Xriuk</b>
<div style="font-size:10px;color:#BEBEBE;line-height:10px">ha comprato</div>
<span class="ellips games">mkx brteshtnx</span>
</div>
<span style="font-size:12px;height:50px;width:236px;display:block" class="ellips">sdjchsdui edi0ufwuèè+eè+è+èàùiek ci0hxjomwui9vjko'asdhvfyu8rk cxi0ehfuioweju9cwej icjnweuceioncuiasn cu9wecji0wejucm vuiom fiwefdoeqr hg wgtehwhwtwghrh</span>
<a class="url" style="float:right;font-size:11px;display:none" href="7">Continua a leggere -></a>
</div>
Basically all the elements with the class ellips get ellipsed if overflow the size of the box, what I want to do is to display the if any of two span contains the string "...".
What I already did:
$(".ellips").ellipsis();
var text = document.getElementsByClassName("ellips");
if(text){
for(var i = 0; i < text.length; i++){
if(text[i].innerHTML.indexOf("...") != "-1"){
***HERE***
}
}
}
In ***HERE*** I need to put a code which returns the child element "#url" of the top parent element ".comment" (the top parent element must correspond to the current ".ellips" selected).
Any help?
Thanks!

Try
$(".ellips").ellipsis();
$('.comment .ellips').each(function () {
if (this.innerHTML.indexOf("...") != "-1") {
var $url = $(this).closest('.comment').find('.url');
//here $url refers the element with url class under the same .comment element
}
})

Try this:
$(text[i]).closest('.comment').find('a.url')