Develop Reference

changing Div order in a div main container, javascript DOM manipulation

i want to move a div form the start to the end in a the same div:from 1-2-3 to 2-3-1
my code
const cards = document.querySelectorAll(".card");
const firstCard = document.querySelectorAll(".card")[0].innerHTML;
cards[0].remove();
document.getElementById("mainC").appendChild(firstCard);
<div id="mainC">
<div class="card"> 1 </div>
<div class="card"> 2 </div>
<div class="card"> 3 </div>
</div>
i want to move a div form the start to the end in a the same div:from 1-2-3 to 2-3-1

Based on your original code,we need to remove .innerHTML,then it will work
const cards = document.querySelectorAll(".card");
const firstCard = document.querySelectorAll(".card")[0];// remove .innerHTML and it will work
cards[0].remove();
document.getElementById("mainC").appendChild(firstCard);
<div id="mainC">
<div class="card"> 1 </div>
<div class="card"> 2 </div>
<div class="card"> 3 </div>
</div>
Another solution is to store the content into an array and change the array element order
let divs = []
document.querySelectorAll('#mainC .card').forEach(d =>{
divs.push(d.outerHTML)
})
divs.push(divs.shift())
document.querySelector('#mainC').innerHTML = divs.join('')
<div id="mainC">
<div class="card"> 1 </div>
<div class="card"> 2 </div>
<div class="card"> 3 </div>
</div>

you have used document.querySelectorAll(".card")[0].innerHTML which gives '1' which is not type "node" so it will give an error when appending as a child.
remove .innerHTML and it will work
here is an example that removes the first child and append it to the end.
const shuffle = () => {
const parent = document.querySelector("#mainContainer");
const childrens = [...parent.children];
parent.appendChild(childrens.splice(0,1)[0]);
};
<button type="button" onclick=shuffle()> suffel</button>
<div id="mainContainer">
<div class="card">1</div>
<div class="card">2</div>
<div class="card">3</div>
</div>

How to look for child elements in a collection

im very new to javascript and probably thats a silly question. What I am trying to achieve is to loop through rows of a "table", get the innerHTML of specific child nodes and multiply them together.
The html looks like this:
<div class="parent">
...
<div class="countChild">
<div class="container">
<span class="count">5</span>
</div>
</div>
<div class="valueChild">
<span class="value">30</span>
</div>
...
</div>
<div class="parent">
...
<div class="countChild">
<div class="container">
<span class="count">2</span>
</div>
</div>
<div class="valueChild">
<span class="value">30</span>
</div>
...
</div>
To be specific: I want to get both the values inside the'countChild' and the 'valueChild'. In this example those are 5 and 30 for the first row and for the second row its 2 and 30. Then perform a muiltiplication.
What I tried to do is to get all the parent nodes and then iterating through them to get the child nodes.
const parents = document.getElementsByClassName('parent');
for(var row in parents) {
var count = row.getElementsByClassName('countChild').lastChild.innerHTML;
var value = row.getElementsByClassName('valueChild').lastChild.innerHTML;
....
}
However the debugger already throws an error when im trying to get the childs. The error message is row.getElemenstByClassName is not a function. I guess the collection cannot be used like this and my understanding of how to use js to get information from the document is wrong.
Edit: This is what the tree looks like
<div class="listing-entry">
<div class="value-container d-none d-md-flex justify-content-end">
<div class="d-flex flex-column">
<div class="d-flex align-items-center justify-content-end">
<span class="font-weight-bold color-primary small text-right text-nowrap">30</span>
</div>
</div>
</div>
<div class="count-container d-none d-md-flex justify-content-end mr-3">
<span class="item-count small text-right">5</span>
</div>
</div>

You should access parents like an array (not really array but you can cast it to one). Btw, I encourage you to use querySelectorAll and querySelector instead of getElementsByClassName
const parents = document.querySelectorAll(".parent")
parents.forEach(function(row) {
var countChild = row.querySelector(".countChild")
var valueChild = row.querySelector(".valueChild")
var count = countChild ? countChild.innerText : 0
var value = valueChild ? valueChild.innerText : 0
console.log(count, value, count * value)
})
<div class="parent">
...
<div class="countChild">
<div class="container">
<span class="count">5</span>
</div>
</div>
<div class="valueChild">
<span class="value">30</span>
</div>
...
</div>
<div class="parent">
...
<div class="countChild">
<div class="container">
<span class="count">2</span>
</div>
</div>
<div class="valueChild">
<span class="value">30</span>
</div>
...
</div>
Edit: I'm using querySelector instead of getElementsByClassName, and checking if child exists before accessing its innerText property.
Edit: here's a function to get all text nodes under a specific node. Then you can combine them and trim the result to get the value you want.
function textNodesUnder(node) {
var all = [];
for (node = node.firstChild; node; node = node.nextSibling) {
if (node.nodeType == 3) {
all.push(node);
} else {
all = all.concat(this.textNodesUnder(node));
}
}
return all;
}
var nodes = textNodesUnder(document.querySelector(".listing-entry"))
var texts = nodes.map(item => item.nodeValue.trim())
console.log(texts)
<div class="listing-entry">
<div class="value-container d-none d-md-flex justify-content-end">
<div class="d-flex flex-column">
<div class="d-flex align-items-center justify-content-end">
<span class="font-weight-bold color-primary small text-right text-nowrap">30</span>
</div>
</div>
</div>
<div class="count-container d-none d-md-flex justify-content-end mr-3">
<span class="item-count small text-right">5</span>
</div>
</div>

How to insert html element inside the index.html from javascript

I want to insert the card into container using javascript. How do I do it. or make those card display in flex. So it's not like shown in below pic. I have used insertAdjancentHTML to insert the data in note class using javascript. However i'm unable to put them in container.
const addBtn = document.getElementById("add");
const addNewNote = (text = "") => {
const note = document.createElement("div");
note.classList.add("note");
const htmlData = `<div class="card m-4" style="width: 18rem">
<div class="card-body">
<div class="d-flex justify-content-between">
<h5 class="card-title">Card title</h5>
<span class="icons">
<button class="btn btn-primary">
<i class="bi bi-pencil-square"></i>
</button>
<button class="btn btn-primary">
<i class="bi bi-trash"></i>
</button>
</span>
</div>
<hr />
<p class="card-text">
Some quick example text to build on the card title and make up the
bulk of the card's content.
</p>
</div>
</div>`;
note.insertAdjacentHTML("afterbegin", htmlData);
console.log(note);
document.body.appendChild(note);
};
addBtn.addEventListener("click", () => {
addNewNote();
});

Firstly, just use innerHTML - it's an empty element:
note.innerHTML = htmlData;
Secondly, you need to select the element to append this note to. Add an ID:
<div class="container d-flex" id="noteContainer">
And append it like so:
document.getElementById("noteContainer").appendChild(note);

You can add an identifier to the div an use the appendChild to this div instead of the body of the document
<div id="myDiv" class="container d-flex"></div>
And at the end of your function
document.getElementById("myDiv").appendChild(note);
Working example
const button = document.getElementById("addButton")
const addNote = () => {
const myElement = document.createElement('p')
myElement.innerHTML = "Hello world !"
const div = document.getElementById("myDiv")
div.appendChild(myElement)
}
button.addEventListener("click", addNote)
<button id="addButton">Add element</button>
<div id="myDiv"></div>

Cache the container element.
Return the note HTML from the function (no need to specifically create an element - just wrap the note HTML in a .note container), and then add that HTML to the container.
(In this example I've used unicode for the icons, and a randomiser to provide some text to the note.)
const container = document.querySelector('.container');
const addBtn = document.querySelector('.add');
function createNote(text = '') {
return`
<div class="note">
<div class="card m-4" style="width: 18rem">
<div class="card-body">
<div class="d-flex justify-content-between">
<h5 class="card-title">Card title</h5>
<span class="icons">
<button class="btn btn-primary">🖉</button>
<button class="btn btn-primary">🗑</button>
</span>
</div>
<hr />
<p class="card-text">${text}</p>
</div>
</div>
</div>
`;
};
function rndText() {
const text = ['Hallo world', 'Hovercraft full of eels', 'Two enthusiastic thumbs up', 'Don\'t let yourself get attached to anything you are not willing to walk out on in 30 seconds flat if you feel the heat around the corner'];
const rnd = Math.round(Math.random() * ((text.length - 1) - 0) + 0);
return text[rnd];
}
addBtn.addEventListener('click', () => {
const note = createNote(rndText());
container.insertAdjacentHTML('afterbegin', note);
});
<div>
<button type="button" class="add">Add note</button>
<div class="container"></div>
</div>

Interchnage the children of two divs using a button

My document structure is:
<div id="mainWindow">
<div id="subele1"></div>
</div>
<div id="subWindow">
<div id="subele2"></div>
</div>
I want to create a button so that the children subele1 and subele2 are interchanged every time the button is clicked.

UPD
function handleButtonClicked() {
const mainElement = document.getElementById('subele1')
const subElement = document.getElementById('subele2')
const mainElementValue = mainElement.innerHTML
mainElement.innerHTML = subElement.innerHTML
subElement.innerHTML = mainElementValue
}
<div id="mainWindow">
<div id="subele1">main Window!</div>
</div>
<div id="subWindow">
<div id="subele2">sub Window?</div>
</div>
<button id='main' onclick={handleButtonClicked()}>switch</button>

js modal popup value get stacked

I want to show a modal popup when the user clicked a button, but it keeps adding to the innerHTML
<div class="popup-container hide">
<div class="popup-wrapper">
<!-- <div class="popup-content"> -->
<!-- </div> -->
<div class="order-container">
<div class="value-container">
<button class="minusBtn"><img src="icon/minus.png" alt="" width="30px"></button>
<div class="value">1</div>
<button class="plusBtn"><img src="icon/plus.png" alt="" width="30px"></button>
</div>
<button class="orderBtn">Add To Cart</button>
</div>
</div>
</div>
Here I create a new div and insert it into the parent, and showing the clicked data with literal template
let content = document.createElement('div');
content.classList.add('popup-content');
content.innerHTML = `
<div class="popup-image">
<img src="mcd/${item.img}" alt="">
</div>
<div class="popup-name">
${item.name}
</div>
<div class="popup-price">
${item.price}
</div>
`;
let wrapper = document.querySelector('.popup-wrapper');
let orderContainer = document.querySelector('.order-container');
wrapper.insertBefore(content, orderContainer);

You need to remove all existing .popup-content elements before you insert a new one if you want only one to appear.
document.querySelectorAll('.popup-content').forEach(el => el.remove());
let content = document.createElement('div');
...