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javascript - Add drag and drop function to tree component

I'm currently working on a tree component that has click and double-click events. Now I want to add the drag and drop function. Does anyone have a better idea for implementing drag and drop? What should I do if events such as mousedown and mousemove conflict with the click event?

怪我咯 2017-05-19 10:19:48 0  1  543

Accessing drag-and-drop elements in HTML: a comprehensive guide

The 'dragenter' event is fired when a dragged element enters a drag-and-drop element. This event is attached to the drop element so I can access it. Where is the dragged element?

P粉316890884 2023-08-01 10:13:18 0  1  693

javascript - HTML5 drag and drop does not work on the pad, how to solve it

HTML5 drag and drop cannot be used on the pad and the dragStart event cannot be triggered.

滿天的星座 2017-06-29 10:10:07 0  1  1053

Drag-and-drop method for adding text fields to user-uploaded PDFs

Please someone explain to me how to drag and drop a text field into an uploaded PDF like adobesign. I'm trying to make a React app using DocuSignAPI and I need to add fields to a PDF.

P粉232793765 2024-03-31 09:46:21 0  1  614

JavaScript implements the drag-and-drop function of multiple elements

I found this code which allows you to drag and drop an item within a specific area, but I can't rewrite it to allow multiple elements to be dragged and dropped because I don't know how to get the id of the dragged object from the drop_handler function . letoffsetX;letoffsetY;onDragStart=function(ev)...

P粉276064178 2024-01-10 16:54:21 0  1  615

angular.js - When doing drag-and-drop interaction in angular, is it better to use js to change the dom, or only change the data?

Online searches recommend not to change the DOM, but changing only the data will cause re-rendering, and the originally opened drop-down items will be closed. The interaction effect is not good. But if you use js to change the dom, the data will become difficult to process.

ringa_lee 2017-05-15 17:06:50 0  2  793

mysql - How to insert into the database after drag and drop reordering?

It is an article pagination, for example, ten pages, and the serial number is 1-10; one page stores a piece of data, but how do I sort it in the database after dragging it randomly?? The drag-and-drop modifications of each page are saved in the database in real time. I Now there are two ideas. One i...

某草草 2017-05-18 10:56:17 0  1  1239

javascript - Can drag-and-drop layout not be implemented on the mobile terminal?

If you swap the first div and the second div on the mobile side, the body will scroll down. I don’t have any ideas at the moment and I don’t want to reinvent the wheel. Is there any effect like http://www.jq22.com/demo/drag...? {code...}

曾經(jīng)蠟筆沒有小新 2017-06-28 09:29:02 0  4  1055

javascript - js drag and drop problem

Drag a div to different areas, how to determine which area it is dragged to? Please select different option areas when dragging as shown in the figure, how to determine which area it is dragged to?

巴扎黑 2017-06-28 09:26:59 0  5  878

javascript - swiper.js has nested swiper. The initial setting cannot slide to the next one. Re-initialize after the end.

{Code...} Drag and drop completed {Code...} How to re-initialize?

漂亮男人 2017-06-28 09:27:46 0  1  951

Use mouse wheel for page zoom, click and drag to pan the page

How to create scrolling and panning effects for the entire page using the mouse wheel? Basically just like any 2D editor, scroll to zoom and click and drag to pan, but for the entire body. I can't find any information about it online.

P粉308783585 2024-03-26 14:11:27 0  1  510

javascript - What are the methods for data interaction between front-end and back-end? What are the connections between them? Specific details?

I am a front-end person, and I am new to this aspect of data interaction. I know that I can parse json data, write PHP to receive background data, and then dynamically generate pages. This is all I know. I also want to know more about data interaction. Great gods come here to give advice, express th...

PHPz 2017-05-16 13:00:02 0  3  751

javascript - How to implement the drag-and-drop function of jquery ui to stop drag-and-drop when certain conditions are met

As shown in the picture, I can drag the small dot in the lower right corner to zoom the image. Since the zoom function of jquery ui cannot be satisfied, I wrote this myself. Now I need to drag the small dot in the lower right corner to the position in Figure 2. , you can no longer continue dragging ...

某草草 2017-05-19 10:42:24 0  1  558

objective-c - wkwebview js interaction how to add multiple ScriptMessageHandler conveniently and quickly

If there are many interactive methods, it is annoying to add them one by one and have to remove them one by one. Is there any way to solve it with a small amount of code? When adding an interaction, you need to operate in 3 places: 1. Write the method to implement 2. Add ScriptMessageHandler 3. deal...

高洛峰 2017-05-02 09:36:41 0  0  742

javascript - antd's Tree component, does it support drag and drop restrictions?

When dragging the Tree component, I want to restrict the parent node from being dragged to the level of the child node, which means that only the child node can be dragged upward. Can this be supported by antd?

ringa_lee 2017-05-19 10:32:01 0  1  1045

I followed the steps, but when I zoom in and out, the drop-down doesn't appear when I click the button.

I followed the steps, but when I zoom in and out, the drop-down doesn’t appear when I click the button.

千里同**絡(luò)科技**** 2020-08-02 17:50:48 0  0  2667

Asynchronous Programming - How to elegantly solve the problem of interaction between Nginx and back-end third-party services?

For example, if you want to develop an nginx module to handle API, each API call process needs to interact with another back-end API server (not an HTTP server) several times, and the subsequent behavior will be determined based on the results of the interaction. So how to use it elegantly? How to h...

滿天的星座 2017-05-16 17:23:15 0  1  623

Select options in drop-down menu using CSS and Javascript

I have a CSS selector value: .ng-touched>div:nth-child(1)>div:nth-child(1)>div:nth-child(2)>input:nth-child(1 ) I'm trying to use document.querySelectorAll to find this CSS selector that has a dropdown menu and select the option with the text "APPLE". It is the ...

P粉739706089 2023-09-04 22:10:59 0  1  695

After obtaining the database data in thinkPHP5, the value of the drop-down box is selected by default and is passed to the background and disappears. There are pictures and codes, I hope someone can help.

After getting the data from the database, it is selected by default. I write it in two formats: using the ajax method: If I write a judgment statement, when I change the option of the drop-down box and submit it, js can get the changed data, which is status and Value of role: The following picture i...

3維 2019-10-04 23:28:15 0  2  1275

javascript - When using H5 drag and drop, why is the dragged element removed?

1. Please see the phenomenon: https://codepen.io/xuyu/proje... 2. The effect I want to achieve is to copy the dragged element to the specified area and do not want to delete the dragged element.

ringa_lee 2017-06-22 11:53:56 0  1  1104