Choosing a React Hook suitable for use with Firestore's onsnapshot

I use Firestore snapshots a lot in my ReactNative app. I also use Reacthooks. The code looks like this: useEffect(()=>{someFirestoreAPICall().onSnapshot(snapshot=>{//When the component initially loads, add all loaded data to the state. //When the data on Firestore When a change occurs,...

P粉555682718 2023-08-24 13:48:51 0  2  531

How to show loader of php page?

I have a bunch of .php pages, each corresponding to an html webpage. Each page takes about a minute or so to fully process and load. I want to show a loading image to the user when the page is fully loaded. I thought of a way logically like loading the image first and the main content stays hidden w...

P粉651109397 2024-01-10 16:52:02 0  1  494

MySQL database query takes a certain amount of time

I have a large message database with 24,000 rows: rows 0-24 are displayed (a total of 2455455 rows, the query took 0.0006 seconds). messages, so I need to load conversations faster, for users with less conversations, loading is as follows (user has 3.2k conversations): Showing rows 0-24 (total 3266 ...

P粉764836448 2023-08-31 22:29:19 0  2  616

Eliminate flickering during page load events when modifying existing DOM elements

I have the following DOM element changing function using plain JavaScript, in which I use a page load event to change a span element containing some text string of the DOM. Using the following code, the DOM elements will change as expected. However, they still see a minimal portion of the flickering...

P粉143640496 2024-03-26 19:30:32 0  2  524

Eagerly looking forward to Teacher Zhu's reply, the web video online player plug-in configuration is incorrect.

Hello, Teacher Zhu, I see that the video addresses on our website are all in the structure of < src:blob:http://....>. No matter how long the video is, they will load quickly, not at all. No jamming. 1. Ours should also be a ckplayer player. How did you optimize the video problem (back-end upl...

正在输入... 2020-01-04 23:18:13 0  0  1011

Using PHP, can I put a foreach statement into a transient?

I'm working in WP using PHP and trying to reduce the load time of a function that fetches a lot of data. I thought transients would work, and (as shown below) I loaded the course query in transients, but it doesn't work with the foreach statement, or rather, I don't know how to set it up correctly t...

P粉352408038 2024-04-03 17:12:43 0  2  520

Update React frontend data to reflect changes to MySQL server

I'm currently working on a web application using React to build the frontend and SpringBoot to build the backend. I have built a backend REST API that interacts with a MySQL database. My problem is that I want my data to be refreshed/reloaded on the frontend when something changes in the backend dat...

P粉384679266 2023-08-16 00:03:49 0  1  537

How does Android implement network acquisition and loading of layouts?

Since the company's original project uses webview to develop products, running CSS3 animations is very laggy. I want to develop a version of the native app, but I also want to retain the advantage of the web that can flexibly update the interface. The initial idea is to obtain it from the server eve...

大家讲道理 2017-06-12 09:24:30 0  2  921

Use JS to control playback quality

Is there any way to control the playback quality of a video using Javascript? More precisely, I want to select the video quality using JavaScript. Like I want YouTube or any other video to automatically run at 1080p when loading the browser in chrome or firefox instead of starting at 480/720P? I pre...

P粉513318114 2024-04-04 00:21:55 0  1  566

How to scrape data from a website without HTML elements?

How can I scrape data from the following website to find specific case details? Here are the manual steps to find the case details: Navigate to https://www.claytoncountyga.gov/government/courts/court-case-inquiry/ It seems there may be a JavaScript loading form with buttons/inputs that would take yo...

P粉819533564 2024-03-20 10:55:29 0  1  500

vue.js/bootstrap: onclick event method not called, error "Variable not found: updateDocument"

I'm new to front-end development but have basic understanding of HTML5, CSS and Javascript. I created a vue.js project and added bootstrap and axios. My application loads data and displays them. However, once I click the "Show", "Update" or "Delete" button, I get "...

P粉757640504 2023-09-09 20:06:48 0  1  896

How to update web page title in real time?

I have a web page that implements a set of tabs, each tab displays different content. The click of the tab does not refresh the page, but hides/shows the content on the client side. There is now a requirement to change the page title based on the tab selected on the page (for SEO reasons). Is this p...

P粉037880905 2023-08-22 14:08:16 0  2  460

javascript - How to use native JS listening to event bind more loaded tags

There are projects that use JS templates, but the tags in the template are html tags whose strings are not functioning properly. After event binding is performed on the tags loaded at the beginning of the page, the tags loaded later will not be loaded unless jQuery is used. I think I don't know what...

天蓬老师 2017-06-26 10:56:02 0  3  930

How to update a JavaScript counter on a web page in real time when the browser loses focus?

I'm writing a browser game using HTML, CSS and JavaScript, written in Perl. Health and stamina are saved on the server and I use JavaScript to show the user a live updated count of these stats when the current page loads. This feature works well, but if the user switches tabs or switches to another ...

P粉825079798 2024-01-16 17:40:29 0  1  506

Why is the app high defense server preferred when deploying the app?

As HTML5 code matures, more and more users are building app servers. Since the app installs common materials and caches on the mobile device and then reads the content on the server, the loading speed is faster than the mobile website and the user stickiness It is also relatively powerful, so the co...

纵横数据** 2020-03-16 14:46:27 0  0  1207

javascript - The data in Vue is obtained through Ajax, and then Vue is instantiated. How to control the Ajax request to be executed first after the page is loaded, and then instantiate Vue after the request is successful?

The data in Vue is obtained through Ajax, and then Vue is instantiated. How to control the Ajax request to be executed first after the page is loaded, and then instantiate Vue after the request is successful?

曾经蜡笔没有小新 2017-06-26 10:50:56 0  7  923

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  845

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  737

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  629

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  600