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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

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

javascript - ios webview How to prevent the scroll bar from being dragged when it reaches the top?

The webview has set webView.scrollView.bounces = NO; the outermost layer of the webview will no longer be dragged, but the overscroll elements inside the webview will still have a drop-down dragging effect. How to prohibit it? There is no such problem on Android.

曾经蜡笔没有小新 2017-06-24 09:44:25

Trim and calculate mobile number in php form textarea field

I have a textarea field in my form where I can copy and paste a mobile number. One number per line, like this I can copy and paste hundreds of mobile numbers to submit in this form. I want to trim the field, after copy pasting I only want to keep the 10 digits. Only valid 10-digit numbers should be ...

P粉883278265 2024-03-31 08:46:11

javascript - Is there any good solution for showing and hiding animations?

Example: It has the same effect as this animation. The div is hidden first. After clicking the button, it is displayed and has animation effects. It is the same when it is hidden. But I definitely wrote it too complicatedly. Is there a simpler solution (without third-party libraries)?

阿神 2017-06-30 09:59:55

Linux cannot copy problem

If this program is installed under root, then after installation, I find that its configuration file cannot be copied and pasted manually. Do I need to use commands under root to copy and paste in the current directory? Is that so? But I found out why copying like this doesn’t work?

过去多啦不再A梦 2017-06-12 09:24:41

phpstudy modified the settings, and when the whole was copied to another computer, it returned to the original parameters when it was started.

phpstudy modified the settings, such as changing port 80 to 8080, and also modified port 80 in apache's ini, and then copied the entire file to other computers. When starting, the port number defaulted to 80, and the startup could not succeed! As a result, you have to manually modify the settings an...

花生油 2018-10-22 22:21:22

The div is not floating very well. I don't know where the problem lies.

<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>jquery animation effect</title> <script type="text/javascript" src="jquery-3.3.1. min.js&qu

依然 2019-02-20 15:50:27

jquery - How to embed JQ code in angular?

I encountered a control problem in the project. I used the panel drag effect written in JQ before. I want to transplant it to the angular code and I don’t know how to deal with it. Please let me know. JQ code {code...} angular {code...}

黄舟 2017-06-30 10:00:14

css3 - How to achieve the effect of each part of the page appearing as the scroll bar slides down?

I looked at a website. As the scroll bar slides down, every part of the page has the same effect as when it was first loaded. After refreshing again, these effects will reappear. How is this done? Is it written in the load of jquery? It is similar to the homepage of this website http://www.itxdl.cn/...

漂亮男人 2017-06-05 11:10:23

The element must disappear when the page nears the end

I have this JS code for adding and removing classes when scrolling down from the top of the page, but what I want to do is disappear when you get close to the end of the page or go back to revert to the old state after some scrolling (e.g. from the right: 7px to right: -150px). I copied the same JS ...

P粉463418483 2024-03-29 23:04:00

html5 - How to use Canvas technology to create a music score that jumps up and down

I would like to ask how to use canvas technology to create a music score that jumps up and down. It is similar to this picture, with a simple effect of jumping up and down!

PHPz 2017-05-16 13:21:58

Progress bar animation in recyclerview item android - progress bar animation in recyclerview item

To write a demo, I want to animate the progress bar in the item in the recyclerview, so I write it by continuously setting setProgress(). However, in the actual process, the animation will play on the incorrect item, even if I judge that if the item If it is being reused, there is nothing you can do...

扔个三星炸死你 2017-06-08 11:02:32

javascript - Click the left and right arrows, the picture will move accordingly, and the picture in the center will always be the largest

I want to create the effect of the picture below. There are currently 6 pictures. There are two questions. 1. How to start from the first or last picture without interruption after moving to the left or right. 2. The biggest effect of the picture in the middle position is How to make it, I hope expe...

曾经蜡笔没有小新 2017-05-19 10:29:25

Looking for a javascript map eagle eye plug-in

1. Is there a JavaScript plug-in (it seems to be called the Eagle Eye plug-in) that can achieve the following effect? The small window on the lower right side displays a thumbnail of the map on the left, and the display range of the map on the left can be changed by dragging the blue area of the s...

高洛峰 2017-05-18 10:50:05

javascript - How to create transition effect in js?

I'm not very familiar with js, so I would like to ask, if I use js to click a button, and then the div moves to 500px on the right after 5 seconds, what is the idea for creating this effect? Should I write a class first to achieve all these effects, and then use js to switch the className? But on cl...

滿天的星座 2017-06-26 10:54:58

javascript - jquery's animate background-position-y starts from 0 every time on IE

http://jsbin.com/yolexeqidu/1... jquery's animate background-position-y will start from 0 every time for IE9 and above. For IE8 and below, Chrome and Firefox do not have this phenomenon. How to solve this phenomenon? The animation effect will jump one after another. The code is as follows {code...}

迷茫 2017-05-19 10:32:46

javascript - why two elements are needed to create a scrolling effect with transform

I read other people's articles why it is necessary to use two layers of elements to perform two animations to achieve the parabolic effect of a small ball, instead of just writing one element <div class="ball"></div>? Then use transform to do it Modification of ...

滿天的星座 2017-05-19 10:18:02

Can't set a value in a web form using "value='foo'", but entering the value manually is OK?

I tried setting the value of several fields in a web form using something like document.getElementsByName('form[493202]')[0].value="Foo" If I do this in the browser console the field will be Updated, but if I then manually click on the field it reverts to the old value. The old values we...

P粉863295057 2023-09-13 15:56:10