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How to add multiple objects to local storage with the same key

I have this piece of code that reads data from an excel sheet, turns them into objects and then display their details in a neat product card
let allHoodies = [
['Hoodie', 'Purple', 'Cotton', '$39.99', 'image/items/hoodies/hoodie(1).jpg'],
['Hoodie', 'Blue', 'Cotton', '$39.99', 'image/items/hoodies/hoodie(2).jpg'],
['Hoodie', 'Green', 'Cotton', '$39.99', 'image/items/hoodies/hoodie(3).jpg']
]
allHoodies.forEach((element, index) => {
let obj = {}
obj.id = index
obj.type = element[0]
obj.color = element[1]
obj.material = element[2]
obj.price = element[3]
obj.imagesrc = element[4]
allHoodies[index] = obj
})
//Evaluating each hoodie and displaying its information in HTML
allHoodies.forEach(function(hoodie) {
let card = `
<div class="card">
<img class="product-image" src="${hoodie.imagesrc}">
<h1 class="product-type">${hoodie.type}</h1>
<p>Color: ${hoodie.color}</p>
<p>${hoodie.material} Read more </p>
<p class="price">${hoodie.price}</p>
<p><button>Buy</button></p>
</div>
`;
// Add the card to the page
document.getElementById('product-container').innerHTML += card;
});
What I'm trying to do is, upon clicking "Buy", it adds multiple items to the local storage although I'm struggling to do it and add multiple ones, it keeps on adding only 1 of them and overwriting the previous one (I'm assuming due to the fact that they have the same key)
Here's what I've tried (which works, but its not my goal):
function addToCart(id){
let hoodie = hoodies[id];
localStorage.setItem('item', JSON.stringify(hoodie));
}
and then I simply add the addToCart() function to the button, would someone guide me and help me figure out how I could actually add multiple ones to the local storage and not just keep overwriting?
Expected result:
Runnable JSFiddle snippet

You can use localStorage#getItem to get the current list, and JSON#parse to convert it to an array of objects. Then, use Array#push to add the current item, and finally, use localStorage#set and JSON#stringify to save the updated list:
function addToCart(id) {
try {
const hoodie = allHoodies[id];
if(hoodie) {
const items = JSON.parse(localStorage.getItem('items') || "[]");
items.push(hoodie);
localStorage.setItem('items', JSON.stringify(items));
}
} catch(e) {
console.log('error adding item');
}
}
Function to show the saved list:
function displayProductsinCart() {
const products = JSON.parse(localStorage.getItem("item") || "[]");
document.getElementById("item-container").innerHTML = products.reduce((cards, product) =>
cards + `<div class="card">
<img class="item-image" src="${product.image}">
<h1 class="product-type">${product.type}</h1>
<p>Color: ${product.color}</p>
<p>${product.description}</p>
<p class="price">${product.price} </p>
<p><button>Buy</button></p>
</div>
`, '');
}

data extraction with javascript fetch api

I am pulling data with fetch api. but I could not retrieve the data in the todosApi section of the last data I pulled. how can i pull data?
const usersApi = () =>{
fetch("https://jsonplaceholder.typicode.com/users").
then(response=>response.json()).
then(girilenVeri).
catch(e=>console.log(e));
}
const todosApi = (element) =>{
fetch(`https://jsonplaceholder.typicode.com/todos/?userId=${element.id}`).
then(response=>veriOlusturucu(response.json(), element)).//I can't get the data in response.json
catch(e=>console.log(e));
}
const girilenVeri = (data) => {
let cumle = [];
document.getElementById('arama').addEventListener('keydown',function(e){
if(e.keyCode == 8){
cumle.pop();
veriEslestir(data, cumle);
}
});
document.getElementById('arama').addEventListener('keypress',function(e){
cumle.push(String.fromCharCode(e.keyCode));
veriEslestir(data, cumle);
});
}
const veriEslestir = (data,cumle) =>{
veri = cumle.toString().replace(/,/g,"");
data.forEach(element => {
if(element.username.toLowerCase() == veri.toLowerCase()){
todosApi(element);
}
});
}
const veriOlusturucu = (todo,element) => {
console.log(todo);
console.log(element);
let html = "";
html =`
<h5 class="card-title">İletişim</h5>
<ul class="list-group">
<li class="list-group-item">Kullanıcı Adı: ${element.username}</li>
<li class="list-group-item">E-Mail: ${element.email}</li>
<li class="list-group-item">Web Site: ${element.website}</li>
<li class="list-group-item">Şirket: ${element.company.name}</li>
<li class="list-group-item">Telefon No: ${element.phone}</li>
<li class="list-group-item">Adres: ${element.address.street} ${element.address.suite} ${element.address.city} ${element.address.zipcode}</li>
</ul>
<h5 class="card-title">Yapılacaklar Listesi</h5>
<ul class="list-group">
`;
todo.forEach(element=>{//I need to access the data here with loop
html+=`
<li class="list-group-item">Kullanıcı Adı: ${element.title}</li>
`;
});
html +=`</ul>`;
document.getElementById('veriListele').innerHTML=html;
}
document.addEventListener('DOMContentLoaded',usersApi());
How do I return the "response.json" part with a foreach?
There is no problem with user information. but there is a problem with todo information. sends it to me as a promise. I can't access the promise result
If I can get into the "PromiseResult" the problem will be solved. but i can't reach

You're not quite using the fetch api correctly with the todo list. If you notice, on your userApi method, you include an extra .then which is necessary to return the json data rather than the promise:
const usersApi = () =>{
fetch("https://jsonplaceholder.typicode.com/users").
then(response=>response.json()).
then(girilenVeri).
catch(e=>console.log(e));
}
const todosApi = (element) =>{
fetch(`https://jsonplaceholder.typicode.com/todos/?userId=${element.id}`)
.then(response=>response.json())
.then(data => veriOlusturucu(data, element))
catch(e=>console.log(e));
}
Try this out.

Why when i am searching for something else is deleting the previous contents

Why when you are searching for something else is deleting the previous contents ?For example first you search for egg and show the contents but then when you search for beef the program deletes the egg and shows only beef.Code :
const searchBtn = document.getElementById('search-btn');
const mealList = document.getElementById('meal');
const mealDetailsContent = document.querySelector('.meal-details-content');
const recipeCloseBtn = document.getElementById('recipe-close-btn');
// event listeners
searchBtn.addEventListener('click', getMealList);
mealList.addEventListener('click', getMealRecipe);
recipeCloseBtn.addEventListener('click', () => {
mealDetailsContent.parentElement.classList.remove('showRecipe');
});
// get meal list that matches with the ingredients
function getMealList(){
let searchInputTxt = document.getElementById('search-input').value.trim();
fetch(`https://www.themealdb.com/api/json/v1/1/filter.php?i=${searchInputTxt}`)
.then(response => response.json())
.then(data => {
let html = "";
if(data.meals){
data.meals.forEach(meal => {
html += `
<div class = "meal-item" data-id = "${meal.idMeal}">
<div class = "meal-img">
<img src = "${meal.strMealThumb}" alt = "food">
</div>
<div class = "meal-name">
<h3>${meal.strMeal}</h3>
Get Recipe
</div>
</div>
`;
});
mealList.classList.remove('notFound');
} else{
html = "Sorry, we didn't find any meal!";
mealList.classList.add('notFound');
}
mealList.innerHTML = html;
});
}

It's because you are replacing the contents in the mealList element every time.
A simple workaround would be to retrieve the the innerHTML values before you update it.
Something like
let html = mealList.innerHTML;
rather than starting off empty every time you call the function should do the trick.

Getting Null when trying to query the path to my button element

Issue:
I want to return the button Element within my document that matches the specified selector, in this case ".comment-body__interaction--delete" but keep getting a return of null every time I console.log the variable that contains the return element.
Background Info
The HTML element I'm Trying to target has been inserted into the document via innerHTML.
All my scripts are at the bottom of the index.html page
I'm using querySelector at the bottom of the js document.
I know my class name is correct because I can style it via CSS.
my code
// LOCATION VARIABLES ***
const conversation = document.querySelector('.conversation-container-posted');
const form = document.querySelector('form');
console.log(form);
// Array THAT HOLDS ALL MY COMMENT OBJECTS
let objectsArray;
// VARIABLE THAT HOLDS MY HTML TEMPLATE
const template = (singleCommentObj) => {
return `
<article class="comment-container">
<figure class="comment-container__picture">
<img class="comment-container__picture-img" src="${singleCommentObj.image}" alt="profile picture" />
</figure>
<div class="comment-body">
<h3 class="comment-body__name">${singleCommentObj.name}</h3>
<div class="comment-body__date">${singleCommentObj.date}</div>
<article class="comment-body__comment"><p>${singleCommentObj.comment}</p></article>
<div class="comment-body__interaction">
<div class="comment-body__interaction--likes">Likes</div>
<button id="${singleCommentObj.id}" class="comment-body__interaction--delete">Delete</button>
</div>
</div>
</article>
<hr class="comment-container__divider"/>
`;
};
const displayComment = (object) => {
let staticComments = object
.sort((a, b) => b.timestamp - a.timestamp)
.map((values) => {
values.image = 'https://loremflickr.com/48/48';
values.date = moment.unix(values.timestamp / 1000).fromNow();
return template(values);
})
.join('');
conversation.innerHTML = staticComments;
};
// Gets AN ARRAY OF OBJECTS FROM THE api AND ASSIGNS IT TO objectsArray
// CALLS displayComment WITH objectsArray AS A PARAMETER TO INSERT ITS CONTENT INTO THE DOM
axios
.get('https://project-1-api.herokuapp.com/comments?api_key=7d8d085e-486e-42dc-b836-58009cbfa68f')
.then((response) => {
objectsArray = response.data;
displayComment(objectsArray);
})
.catch((error) => {
console.log(error);
});
form.addEventListener('submit', (e) => {
e.preventDefault();
let fluidObject = new FormData(e.target);
fluidObject = Object.fromEntries(fluidObject);
axios
.post('https://project-1-api.herokuapp.com/comments?api_key=7d8d085e-486e-42dc-b836-58009cbfa68f&content-type=application/json', {
name: fluidObject.name,
comment: fluidObject.comment,
})
.then((response) => {
objectsArray.push(response.data);
displayComment(objectsArray);
})
.catch((error) => {
console.log(error);
});
});
// DELETE
const a = document.querySelector('.comment-body__interaction--delete');
console.log(a);
This console.log(a) returns NULL

The code that creates the said element, displayComment is in an asynchronous actions callback.
You have to wait for the action to complete before you try to access the element.
In other words const a = document.querySelector('.comment-body__interaction--delete'); executes before your request was successful and the elements were created.

How is it possible that piece of code that was working is now ignored?

I have coded a ajax based "JS TABS" containing .JSON file like 10 months ago, now wanted to reuse it, and can't find out why it's not working. I haven't touched it since and don't know where is the bug.
When i click the button to render products nothing prints out - except console telling me: items is undefined = so i moved it inside function changeCategoryItems(categoryId) { } well no errors but nothing renders...can someone help me ?
Here is a codepen reference of what i mean: https://codepen.io/Contemplator191/pen/WNwgypY
And this is JSON : https://api.jsonbin.io/b/5f634e0c302a837e95680846
If codepen is not suitable/allowed here is whole JS for that
let items = [];
const buttons = document.querySelectorAll('button');
const wrapper = document.querySelector('section.products');
buttons.forEach(function (button) {
button.addEventListener('click',event => {
changeCategoryItems(event.target.dataset.category);
});
});
function changeCategoryItems(categoryId) {
let items = [];
const buttons = document.querySelectorAll('button');
const wrapper = document.querySelector('section.products');
const viewItems = (categoryId == 0 ) ? items : items.filter(item => item.category == categoryId);
wrapper.innerHTML = "";
viewItems.forEach(item => {
const div = document.createElement('div');
div.setAttribute("class", "product");
div.innerHTML = createItem(item);
wrapper.appendChild(div);
});
};
function createItem(item) {
return `
<div class="product__img">
<img src="${item.img}" class="">
</div>
<div class="product__name _tc">
<h4 class="">${item.heading}</h4>
</div>
<div class="text-desc product__desc">
<p class="">${item.description}</p>
</div>
<div class="product__bottom-content">
<span class="product__info">${item.info}</span>
${item.btn}
</div>
`
}
fetch('https://api.jsonbin.io/b/5f634e0c302a837e95680846')
.then(function (res) { return res.json() })
.then(function (data) {
items = data.items;
changeCategoryItems(1);
});`

In your fetch you're trying to assign data.items to the items variable but the api doesn't return data with an items node so items is undefined. It's possible the api changed their return format since the last time you used it which would explain why it worked previously.
this seems to fix it
.then(function (data) {
items = data;
changeCategoryItems(1);
});

Your issue is in this line:
items = data.items;
Now, the returned value is an array, hence you can use it as it is.
The updated codepen