Javascript code to count the same item added in the list so that the quantity automatically gets increased whenever it is added again.

Question

0.00/5 (No votes)

See more:

If there is an item already, and the same item is added again then it should show "2 now" beside that grocery item. This number should increase every time the same item is added to the grocery list. this is the html part:

<!DOCTYPE html>
<html>
    <head>
        <title>Grocery list</title>
        <meta charset="UTF-8">
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css">
        <link rel="stylesheet" href="grocery_style.css">
    </head>
    <body>
        <div class="container">
            <div class="groceries">
                <h1 style="text-align: center;">Grocery list</h1><br>
                <p style="text-align: center">Enter the items below:</p><br>
                <div style="text-align:center">
                    <input id="userinput" type="text" ><br><button class="btn btn-success" onclick="additem()" value="Add">Add Item</button>
                    "deleteall" class="fas fa-trash-alt">
                </div> <br>
                <div id="allitems"></div>
            </div>
        </div>
        <script src="grocery.js"></script>
    </body>
</html>

What I have tried:

this is javascript part:

const groceries = document.getElementsByClassName("groceries")[0];
const deleteall=document.getElementById("deleteall");
const allitems=document.getElementById("allitems");
const userinput=document.getElementById("userinput");
userinput.addEventListener("keydown",function(event){
    if(event.key == "Enter")
    additem();
})
function additem(){
    var li= document.createElement("li");
    li.innerHTML=userinput.value;
    if (userinput.value == "") {
        alert("Enter some item");
        return false;
      }
    li.addEventListener("click",function(){
        if (li.style.color === "black") {
            li.style.color = "red";
          } else {
            li.style.color = "black";
          }
      })
 allitems.insertAdjacentElement("beforeend",li);
 userinput.value="";
}
deleteall.addEventListener("click",function(){
  allitems.innerHTML="";
})

Posted 19-Apr-21 4:30am

rupender kaur

Updated 19-Apr-21 5:30am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

W∴ Balboos, *GHB* · Answer 1 · 2021-04-19T05:30:00

You need a more code-oriented strategy instead of just displaying on the screen as list items.

Your shopping basket should be a javascript array of the item name (or other reference) and the count. This is a two-dimensional array.

When an item is added you can traverse the array and look for an item to match.

If you find the item then you increase the count element in the array.
If you do not find the item you add it to the end of the array.

Then you can loop through the array and regenerate your list. One reason why you would regenerate (instead of just modifying) is so you can also make an allowance for removing items as well. And even shorting them if you wish.