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  584

java - Web development - POI exports Excel with drop-down boxes and solves the exception caused by too many arrays in the drop-down box

1. If the number of drop-down arrays in Excel is small (about 0 to 20), you can export it in the following way: {code...} 2. The problem is that if there are too many drop-down arrays, the following exception message will appear in POI: {code... ...} The solution to this problem is not easy to find ...

迷茫 2017-05-17 10:00:25 0  1  1175

html - How to create a drop-down list in python by referencing the data in a json document.

I want to create a drop-down list in the input html, and the data of this drop-down list can reference my database json. What code should I write in my py file? This is my input html. Although I can select it on the web page, it is too troublesome to fill in each one. {Code...} This is my py file. T...

怪我咯 2017-06-14 10:52:22 0  1  996

html5 - Why can't the html element select drop-down list be displayed in a pop-up box in the native app?

Why can't the select drop-down list in the HTML page be called on the Android and iOS apps like a pop-up box displaying the list in the webapp?

ringa_lee 2017-06-14 10:52:10 0  2  935

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  607

javascript - Is there a plug-in for multi-select drop-down grouping based on vue?

Then the UI framework I used was element-ui1.2.9 and found that it did not provide such a component. Let's see if there is such a multi-select drop-down grouping plug-in based on vue!

PHP中文网 2017-05-19 10:20:09 0  2  598

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**络科技**** 2020-08-02 17:50:48 0  0  2525

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  1160

In the wdcp configuration environment, enable scheduled tasks to poll every 5 minutes, and the login status will drop after about an hour.

For example: In the wdcp configuration environment, if the scheduled task is enabled to poll every 5 minutes, the login status will drop after about an hour.

super|鹏 2017-08-30 11:37:20 1  1  1096

After constant replacement, the drop-down arrow on the left sidebar cannot appear. There is no problem in introducing JS and CSS.

After constant replacement, the drop-down arrow on the left sidebar cannot appear. There is no problem in introducing JS and CSS. Can anyone give me some guidance on what's going on?

浮尘 2017-12-26 17:00:53 0  3  1553

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维 2019-10-04 23:28:15 0  2  1189

In the user registration section of the third section of Chapter 10 of the TP5.1 tutorial, the bootstrap menu drop-down cannot be displayed, and script verification cannot be performed.

The preliminary implementation of the user registration function in Section 3 of Chapter 10 of the Tianpeng teacher TP5.1 tutorial cannot display the bootstrap drop-down menu and cannot pop up the second question. The script verification cannot be implemented <script> $(function(){ $("#re...

走过沙漠的骆驼 2021-09-20 13:50:37 0  3  919

javascript - if statement in change event in jquery fails

{Code...} Two drop-down boxes request different ajax addresses for the change event of the first drop-down box. Change the data of the second drop-down box. {Code...} Determine the value of the first drop-down box and request different backgrounds. The interface, but the console shows $(this).val(),...

巴扎黑 2017-05-19 10:10:24 0  2  675

Why dataTransfer.clearData doesn't work?

{Code...} After calling e.dataTransfer.clearData() in the drop function, executing getData("Text") will also return the value in setData(), so how to use clearData()? After the drop function is executed, the data saved by dataTransfer.setData() will be automatically deleted...

習慣沉默 2017-05-18 10:56:51 0  2  710

javascript - Please tell me about the second-level linkage ideas, without plug-ins! ! !

As shown in the picture: Looking for ideas for this kind of second-level linkage... I don't know how to write... It was developed using bootstrap and jquery. There are two drop-down menus, but the drop-down menus in bootstrap are used without select and option tags. Waiting online... Urgent! ! !

ringa_lee 2017-05-19 10:22:20 0  5  580

javascript - If the vue drop-down component is used, can the div under the template not be positioned?

Is there a bug in the drop-down component once positioning is used {code...}

某草草 2017-05-19 10:29:31 0  1  783

javascript - select event not bubbling explanation

I would like to ask, the select event does not bubble up. When my mouse clicks on the drop-down box, why does s1 d3 d2 d1 appear on the console? When I click on the number in the drop-down box, s1 d3 d2 d1 appears again {code... }

仅有的幸福 2017-07-05 10:54:59 0  2  844

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  468

How to bind data in angualr

According to the value selected in the drop-down box, another page will be queried based on the value you selected.

2018-09-27 15:54:00 0  0  1164