css - The vertical effect of flex layout cannot be achieved?

Referring to the example of teacher Ruan Yifeng, why does the vertical effect not work when you do it yourself?

为情所困 2017-05-16 13:44:11 0  3  626

javascript - About highchart data rendering

Image description The chart above adds data dynamically. The variable xdata in the code is a time, and the format is 17:21:11. It can be printed out, and the y-axis can also be printed normally. But now the Y-axis data can be rendered normally, but the x-axis cannot be displayed. The expected effect...

習慣沉默 2017-06-26 10:53:06 0  1  866

ReactJS design roadmap timeline

So I have the design I want to do. Basically it's a timeline that goes from the bottom left corner to the top right corner of the page. Additionally, I need to place some div elements between the rows. I also want it to be responsive, specifically the length of it will be reduced, but I still want t...

P粉563446579 2024-03-29 11:31:47 0  1  414

javascript - Image gathering effect, plus 3D effect, why are there lines after gathering?

There are many sub-divs in a div, and the background images of the sub-divs are put together to form a whole picture; for the gathering effect, I added a 3D y-axis inversion effect. Why is there a small seam in the middle when splicing? Logically speaking, it should be after gathering This is the re...

曾经蜡笔没有小新 2017-05-18 10:46:23 0  1  556

javascript - echarts chart style configuration item problem

After setting boundaryGap to true, the coordinate scale has some distance from the left and right as I want, but the distance is too big. How can I make it smaller? This is the category axis boundaryGap and cannot be set to specific values ​​and percentages. I have tried it but it has no effect. Ple...

typecho 2017-06-12 09:31:56 0  1  669

Mongodb limited query return field query is slower?

When I directly use find to return all fields, the results are as follows. The query time is 155. If I limit the returned fields, the query time is longer, and the query time is 251. Why? If I limit the fields returned, the query character bytes will be smaller, shouldn't the transmission be faster?

大家讲道理 2017-05-17 10:04:05 0  1  871

javascript - Use of perfect-scrollbar plug-in

I searched a lot on the Internet about how to use this plug-in, but found that none of them were correct. Ask the master: How to make the initialization of this plug-in display the y-axis scroll bar? Why is the x-axis scroll bar not displayed by default? Also, the use of this plug-in is very differe...

代言 2017-07-05 10:39:45 0  1  1525

Remove vertical spacing from React Native text

I made a CustomText component to use the Poppins font family. But when using it, I get vertical space which ends up getting bigger as the fontsize increases, creating unnecessary space between the two CustomText components. I tried using padding:0,margin:0,line-height:undefined|fontSize but none of ...

P粉211600174 2023-09-02 09:04:40 0  1  525

css center popup on screen, works on computers and tablets but not on phones

Try using CSS to display a help popup in the center of the screen. On my computer and ipad it works fine, but on the iPhone the popup is vertically centered within the entire scrollable vertical space, which means I sometimes have to scroll up or down to see it. I want it to be centered on the curre...

P粉662802882 2024-03-28 20:02:46 0  1  384

Why when vertically aligning a button element in a div, the element has more vertical space than defined by CSS margins?

I have a work in progress page on this site and I thought the hardest part of this page would be the script and styling for filtering the results, but actually the filtering part works as expected, it's just a styling/alignment issue that confuses me I'm running into To the part in question is the m...

P粉080643975 2023-09-14 18:49:41 0  2  604

javascript - Why do the scroll axis scroll forward and roll back produce different effects?

When the scroll axis rolls along, the effect is reasonable, that is, when it reaches the specified position, the corresponding serial number will change color. However, when it scrolls to the bottom, and when it scrolls further, it will appear that it has not reached the specified area. At the top, ...

某草草 2017-05-19 10:25:51 0  1  667

python3.x - Java calls python, and the python code stops automatically, and the reason cannot be found

{Code...} Calling the python code takes a long time to execute. It is estimated to take several hours, about five or six hours. If you execute the Python command directly in the shell alone, there will be no problem; however, if you use java to call python in this way, there will be a problem: after...

習慣沉默 2017-06-28 09:23:50 0  3  1066

javascript - I am a little confused, why can I directly use checked=true to add effects to tags in js?

For example: I need to use js to add a selected effect to the button. Why can you directly use oDiv.checked = true in js to add selected effects? Why don't you need to add a style in the middle? If it is a color, this is oDiv.style.color = "red" ?

阿神 2017-06-26 10:55:27 0  2  775

javascript - css layout problem, you can use flex

The current design draft looks like this, it supports 1-6 characters, centered vertically and horizontally. Text and pictures are obtained by the reading interface. Here comes the difficulty. When there are four characters, two characters break the line. When there are five characters, two character...

曾经蜡笔没有小新 2017-05-19 10:22:11 0  6  585

javascript - Problem with route transition in vue?

Vue adds a cutscene animation fade-in and fade-out effect to the route. The component fades out when it is removed, but when it is entered, it enters instantly and does not fade in. Between these two steps, the page will become blank. The following is my code, copied from the official website: {code...

滿天的星座 2017-06-12 09:30:07 0  3  766

javascript - The loading animation effect of the page is not displayed?

1. The project I am working on now is a data table page. Since the background query takes a long time, in order to improve the user experience, a load animation is added. There is no problem with the plug-in for loading animation. However, during the execution of the method, it is found that the ani...

迷茫 2017-05-19 10:18:28 0  4  709

php - TP3.2 user login timeliness issue

Using tp3.2 for backend management, I encountered a problem when doing user login. 1. After the backend user logs in, it is always valid. If I leave it for a whole afternoon and close the browser, the user login status will always exist. This can only be achieved when clicking logout. The user's exp...

天蓬老师 2017-06-15 09:22:30 0  1  1221

In-depth understanding of the creation process of MySQL index - timestamp field

I would like to understand how an index is created in MySQL - i.e. if it is a TimeStamp field - does it create a hash of the Timestamp field and store it or does it just store the literal value of the timestamp. Since the timestamp is millisecond accurate - each index will be unique, so how effectiv...

P粉418351692 2023-08-10 16:05:59 0  1  641

javascript - js code to obtain verification code countdown problem

When getting the verification code countdown (for example, the countdown is 40 seconds), I click the link to go to another page (_self, this page jumps, no new tab is opened). After a period of time, I click the back button and return to the countdown page. The countdown still starts from 40s. The d...

漂亮男人 2017-07-05 10:50:31 0  3  984