javascript - vuejs+elementui shopping cart price calculation, click the plus or minus sign to modify the quantity and the total price will not change, but the calculation is executed

The function of placing an order for a product finds all the products, clicks to place the order, and then adds the ordered products to the shopping cart. The shopping cart does not need to save the products. You can modify the quantity and calculate the total price. Now the calculation in my method...

巴扎黑 2017-07-05 10:58:23 0  2  1306

Add items to cart using Vue?

I'm trying to figure out how to implement shopping cart functionality on a page using Vue.js. I get a list of items from an API call and print them when the page loads. But I'm having trouble trying to add items to my cart. The functionality should include the ability to select the quantity of items...

P粉464088437 2024-03-26 12:34:33 0  1  448

Navigation bar component does not re-render on state change

I'm trying to create a shopping cart. I created a context and passed the state as value when pressing the increment and decrement buttons on the cart, my item count is changing but when I use the same context in the navigation bar component, in the cart The total number of items will not change. I h...

P粉037880905 2023-09-07 12:01:10 0  1  484

Why am I getting Cannot read property of undefined (read 'innerHTML')?

I'm creating a shopping cart for an e-commerce site and I'm updating the total price of an item in relation to quantity, but I'm running an error? functionupdatetotal(){constcartContent=document.getElementsByClassName("cart-content")[0];constcartBoxes=cartContent.getElementsByClassName(&qu...

P粉205475538 2023-09-08 21:26:37 0  1  895

javascript - Native js+localStorage to achieve shopping cart effect

Questions: 1. When the page is opened for the first time, since there is no local storage, the data will not be retrieved. The product will be added by 1 and will not be added to the shopping cart. However, adding 1 will add 2 items to the shopping cart at once. In the following lessons, 2 items wil...

高洛峰 2017-06-12 09:26:38 0  1  1021

After the user adds items to the shopping cart and saves them to the session, how to store the shopping cart information in the database?

<?phpheader("Content-type: text/html; charset=utf-8");   session_start();//启动session  // session_destroy();  // die();  // var_dump($_SESSION);&nbs

cyjy622 2019-11-17 16:03:36 0  0  993

jQuery.remove() and array.splice() issues

So I have a page that has a list of items and a shopping list. If you add x number of items from the list of items to the shopping list, then try to delete them one by one by clicking on the item in the shopping list and hitting delete on the modal that opened it - first time. Now here comes the pro...

P粉928591383 2024-04-04 17:21:35 0  1  524

Tutorial on the use of PHP's free commonly used express logistics API query interface

The express tracking number query API can be connected to SF express query, postal express query, ZTO express query, etc. These express logistics companies provide express logistics such as automatic identification interfaces for express order numbers and query interfaces for express order numbers. ...

昨日青空 2019-09-10 17:25:29 0  0  1651

How to implement rendering when value changes in ReactJS

When I click on add to favorites (add to local storage but the count is not updated, when I click on the button ref, the count is updated, I am doing this for my e-commerce project, I have a wish list. When I add the item When going to wishlist, I add items to local storage. I need to display the nu...

P粉685757239 2023-09-15 22:36:49 0  1  809

The method of defining dynamic keys is in redux's initialState

I have an e-commerce website where each user has a shopping cart and I use redux and reduxpersist to store it in local storage. I want to handle multiple accounts on one computer, if a user has two accounts, he can switch between the accounts and the data related to each account will be displayed, m...

P粉478835592 2023-09-05 14:15:53 0  1  554

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  851

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  739

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  631

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  602

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  1018

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  521

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38 0  1  717

Spades, Diamonds, Hearts, Clubs => styles do not change font color in Chrome for Android

In Google Chrome on Windows, the card suit symbols (spades, hearts, diamonds, clubs) are colored correctly using the "style" attribute. Unfortunately, the same page displayed in Google Chrome on Android does not display the colors I defined but uses the default black and red. (See the atta...

P粉896751037 2023-09-05 15:25:13 0  1  768