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Hi Stephan,
I realized that the newest versions broke the annotation tool when using touch. In particular, it seems that the viewer wants to scroll and write at the same time when using touch (you …
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A JavaScript component that can be used to update a component based on how far down the page something was scrolled. This is used in my personal website to show/hide navigational tools.
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**移动端**，页面上A，B两个div元素，请实现：
拖拽A元素到B元素上，A元素append到B元素中。
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本题考点在于移动端的拖拽功能实现。大家提交回答的时候，注意缩进距离，起始位置从左边缘开始；另外，github自带代码高亮，所以请使用下面示意的格式。
```js
// 你的JS代码写在这里
```
…
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Hey,
This implementation of infinite scroll doesn't work on iOS / mobile Safari. It can be tested on the demo, and there's an explanation of the issue here: http://stackoverflow.com/questions/2863547…
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For some reason, I can't get the scroll behaviour to work. Even in an absolute minimalist setup like this:
HTML:
``
`drag me`
``
JS:
`import {polyfill} from "mobile-drag-drop";`
`// optiona…
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最近在用 react，hooks 配合 functional component 写起来非常的有禅意。
前两天遇见这个需求：
需要在自定义 prompt 出来的时候禁止页面滑动。
 or change it to e.stopPropagation() in PointerEventUnifier, keyborad will show normally.
```
element.addEventListener("touchstart", function(e){
...
//e.preven…