Create map with D3 but country data does not appear

I have created a map using D3 from topojson but in the html the data for the countries is not shown yet. Hello everyone! I have generated a map of Europe using d3 from a topojson file. This is my code constsvg=d3.select('body').append('svg').attr('width',width).attr('height',height);constprojection=...

P粉285587590 2024-04-02 10:29:33 0  1  426

How to increase the number of icons based on data in Vue

I sent an API request and got a different number of participants (from 1 to 5). Based on this number, a corresponding number of icons should be displayed in the modal box. If there are 3 participants, there should be 3 user icons in the modal. I know how to do it in React, but I'm starting to learn ...

P粉832490510 2024-01-10 17:03:43 0  2  403

javascript - JS and CSS problem, after moving the mouse to an icon on the map, how to center the displayed content relative to the icon.

As shown in the picture below, the right side is the effect I need, that is, when the mouse is moved over the red location icon on the map, the photos and content displayed are centered relative to the location icon below. The left side is the effect I made. The displacement is too serious. Please h...

给我你的怀抱 2017-06-12 09:32:10 0  1  861

Try using background image with css variable in Twig template

So I have a question. I want to use a background image with a css variable, and in my project I'm using Twig to loop through articles that are selected from my database via a sql request. Each article has a relative link to the image in the database so it can be seen on the website. The problem is, ...

P粉083785014 2023-09-04 12:41:18 0  1  537

javascript - Using Baidu map in vue prompts that it cannot be parsed

I use vue-cli to build an application and reference Baidu Map's script in index.html, [<script type="text/javascript" src="http://api.map.baidu.com/api?...I ak"></script>] Then call Baidu in the mounted function of app.vue

阿神 2017-05-19 10:45:45 0  2  1183

javascript - What happens when the local ID obtained in the jssdk image selection API can be used as a URL on the Android side but cannot be used on the ios side?

The api of the jssdk image selection interface--chooseImage returns the local image ID itself after selecting the local image. It can be used as a link to the image. On the Android machine, I set it as a background image without any problem, but the selection is completed on iOS. The id returned aft...

ringa_lee 2017-05-16 13:34:52 0  1  540

javascript - Baidu Map sets the center point at the beginning, how to use the button to transfer to the corresponding center point? ? ? ?

To achieve this, click the Qingdao or Xiamen buttons to switch to the coordinate point position of Qingdao (or the corresponding). Currently, the center point of the initialized map is set to Xinjiang. This is the method to initialize the map $(".btn-Qing"). on('click', function () { {code...

三叔 2017-07-05 11:06:47 0  2  1014

iconfont font icon rotation - Stack Overflow

{Code...} {Code...} The icon is not rotated on the page. You are using the Chrome browser. Can you tell me why? Does it mean that Alibaba’s vector icons do not support rotation {code...} Thank you, there is still no change in the page.

学习ing 2017-06-26 10:52:06 0  4  1420

Export/download Mapbox maps with overlays and markers from HTML

I want to build an HTML page where customers can build their personalized maps. I used Mapbox to create this. There is an overlay on top of this map, and customers can also place markers on the map. But I'm struggling with two big problems: How to get a high quality map image, including overlays and...

P粉459578805 2024-03-29 11:15:04 0  1  504

Leaflet gets all polylines added to map

Once you have added one or more polylines with clickable actions on your map and want to use the measurement tool PolylineMeasure, these polylines will exist in some way. How can I get all created polylines in a map to disable clickability, just like you can with polylines directly you can click wit...

P粉358281574 2023-08-18 13:18:02 0  1  460

javascript - What is the principle of canvas compressing images?

The toDataURL method in canvas can specify the format and compression quality of the image after compression, such as compressing it into webp format: {code...} toDataURL uses base64 to encode the image, and the encoded source file is 33% larger than before encoding. , reference address, but the qua...

给我你的怀抱 2017-06-26 10:55:55 0  2  1131

javascript - vue scrolling loading images

Requirement: Load pictures when the scroll bar is pulled down to the bottom, and load 6 pictures at a time. If the number of pictures exceeds 30, then the first 6 pictures will be removed after the loading is completed, and 30 DOM nodes will be maintained. This is how it is done now. Set an imgarr=[...

阿神 2017-05-18 10:59:25 0  2  663

java - How to make it easier for a class to add attributes in future expansion?

Suppose there are two signs on the map, a hospital and a highway, and these two signs have their own attribute data: for example, the hospital has attributes such as grade, number of buildings, number of patients, floor area, name, etc.; the road has names, grades, etc. , length, construction time a...

天蓬老师 2017-05-27 17:41:12 0  3  600

php - External network pages display a large number of internal network images. Which method is most efficient?

The server is an intranet, maps an external network address, and has a web program that displays pictures of other servers on the intranet. The current approach is to use PHP's file_get_contents method to download the image, and then use nginx to proxy the external IP address to the PHP program, so ...

过去多啦不再A梦 2017-05-17 09:55:19 0  3  591

android - problem of reusing image list after grouping

Find similar pictures, group similar pictures into groups, and put all groups into a list. How to solve the reuse problem of hundreds of pictures? The main reason is that the number of each group is not fixed.

迷茫 2017-05-24 11:38:06 0  1  733

PHP remove orientation exif from image only (without using imagick)

I wrote a script that batch resizes uploaded images locally and creates thumbnails. The problem is if some images are oriented vertically but after resizing they rotate horizontally. This is due to the exif orientation of the image. Is there an easy way to remove orientation exif from an image via P...

P粉141925181 2024-03-27 09:27:01 0  1  463

javascript - js attribute stack diagram

Above: obj stores an address, pointing to an object in the heap. So how is obj.a represented by a stack? It would be better to have a picture, thank you!

滿天的星座 2017-05-19 10:42:02 0  1  571

javascript - Regarding the problem of HighMaps rendering very slowly under IE8

I used highMaps to make a map of China with the following style: The rendering is very slow under IE8, but the speed is acceptable under chrome. I would like to ask what is the problem and is there any way to test the rendering time of highcharts?

高洛峰 2017-06-26 10:54:28 0  1  818

javascript - How to get the Chinese parameter value on the address bar, code it in the JS page, and use it normally?

The first picture is the Chinese parameters passed from the previous page. The second picture is the parameters obtained from the address bar on the current page.

学习ing 2017-06-28 09:26:17 0  3  801

javascript - Webstorm creates json file problem

In Figure 1, when there are no variables, the file is OK. In Figure 2, when something like a={} appears, an error is reported. What I actually want is something like this, as follows

巴扎黑 2017-06-05 11:13:00 0  2  1162