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javascript - Why can't margin:auto auto be aligned up, down, left, and right?

There is only one div in an html. {Code...} css1 can center div.test left and right. css2: {code...}

过去多啦不再A梦 2017-06-24 09:42:38

Is the margin of the weex Android list cell label box model upside down?

Set the margin-left value of the cell element below the list element, and the actual display effect is the margin-right value; {code...} The left side is the padding-left of the list, and the right side is the margin-left of the cell; through the playground app Check the coordinate function and find...

大家讲道理 2017-05-24 11:38:17

javascript - How to implement QQ-like left sliding menu navigation in vue, as shown in the switching effect of the two pictures below

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technical exchange platform for programming enthusiasts, learn, communicate and grow with developers, and create an era for developers!

滿天的星座 2017-06-29 10:09:57

javascript - js crosses two-dimensional arrays to get random numbers. How to achieve average random numbers?

There is a two-dimensional array, how to get 2 or 3 random numbers from a cross (not adjacent to the top, bottom, left, and right)? Array: {code...} I wrote one like this, but it feels very rigid, the numbers obtained are not even, and the code is a bit bloated. Does anyone have a better solution? {...

PHP中文网 2017-07-05 11:07:26

javascript - Asking for help regarding js regular issues

In many cases, we only need to match the content in the middle of the expression, and there is no need to match the content at the position, such as the left and right brackets in the picture below. I know that zero-width assertions can be done, but js does not support reverse assertions. Is there a...

某草草 2017-05-16 13:39:37

Why is the div not centered?

I'm trying to center this element on the screen, also when I hover. In the example below, the div is not centered, even when I hover it, knowing I have a 50% transform and the top/left transform as well, this is what I usually use to center the element. *{box-sizing:border-box;}body{position:relativ...

P粉805922437 2024-02-04 08:28:03

javascript - Native JS implementation of sending verification code seconds

Now there is a problem, as the title says, I want to have a login page, but it is based on the remote control. When binding a mobile phone, a verification code needs to be sent to the mobile phone, and then the label of the button will decrease over time, 60s, 50s... 0s, etc. During the second count...

女神的闺蜜爱上我 2017-07-05 10:44:00

Menu background I want it to be 100% width with no left, right and top gaps

Menu background color should be full width, 24 inches and below should be full screen. This is what it looks like. The website URL is also in the image. Below is my scss to add background color. Could someone please edit the code below so that the background color touches the left and right and the ...

P粉245003607 2023-09-10 21:43:33

How to avoid div being cut off on resize or normal window?

I tried things like overflow:auto and margin-left but overflow:auto will crop off part of the left side of the div and margin-left won't work when the length of the div increases, is there any better one choose. As shown in the code below, you cannot see the text. <!DOCTYPEhtml><html><...

P粉193307465 2023-09-09 08:56:25

Grid columns delay resizing on overflow

I have a 2×2 CSS grid that fills the browser viewport using fixed positioning. It looks like this:-----------------||xxxxxxxxxxxxx|-----------------|x|||x |||x|||x||-----------------The top row and left column each fit their content and are sized auto. The bottom row and right column are each used t...

P粉638343995 2023-09-06 21:25:59

MySQL uses lead function to calculate duration from date to end of date

I have a table that stores records of different sessions of a user (subscribed, unsubscribed, left, online). I can calculate the duration of each session using the below given query. There is a situation, assuming that the user starts an online session at "11:00:00 PM on May 15, 2022", and...

P粉885035114 2024-03-28 14:43:36

How to set the width of a sublist of flex:auto elements

Hello, I have a CSS problem. There are two columns, the right (B) column has a fixed width of 100px and the left (A) column must fill the remaining width. Additionally, within column A, there is a list of subcomponents added horizontally. The problem is that when adding child components, the width o...

P粉676588738 2023-09-09 18:09:18

There is padding between elements but not on either side

I'm creating a card with a title and below it are other cards in 2 columns. The problem is that I want padding between the elements, not around them, at least not on the sides, as that would make the title inconsistent with the box below. Here's what I want: I try to give each green card a different...

P粉087074897 2024-03-29 11:40:34

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

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

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

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

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

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

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