是否有一种方法可以防止用户看到他们试图拖动的图像的幽灵(不是关心图像的安全性，而是体验)。
我已经尝试了这个，它修复了文本和图像上的蓝色选择的问题，但不是幽灵图像:
img {
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-o-user-select: none;
user-select: none;
}
(我也尝试用同样的规则嵌套div内的图像)。 谢谢
当前回答
对于Firefox，你需要深入一点:
var imgs = document.getElementsByTagName('img');
// loop through fetched images
for (i = 0; i < imgs.length; i++) {
// and define onmousedown event handler
imgs[i].onmousedown = disableDragging;
}
function disableDragging(e) {
e.preventDefault();
}
享受。
其他回答
<img src="myimage.jpg" ondragstart="return false;" />
对于Firefox，你需要深入一点:
var imgs = document.getElementsByTagName('img');
// loop through fetched images
for (i = 0; i < imgs.length; i++) {
// and define onmousedown event handler
imgs[i].onmousedown = disableDragging;
}
function disableDragging(e) {
e.preventDefault();
}
享受。
HTML
<img draggable="false" src="img/example.jpg">
JavaScript
document.querySelector('img').addEventListener('dragstart', (event) => {
event.preventDefault();
});
CSS
img {
-webkit-user-drag: none;
}
目前在浏览器或标准轨道中没有无前缀的user-drag或其他版本的属性实现，因为HTML可拖动属性/属性是首选的解决方案。
它是webkit特有的属性。以下是WebKit文档对它的描述:
Heading WebKit provides automatic support to let users drag common items, such as images, links, and selected text. You can extend this support to include specific elements on an HTML page. For example, you could mark a particular div or span tag as draggable. To mark an arbitrary element as draggable, add the -webkit-user-drag attribute to the style definition of the element. Because -webkit-user-drag is a cascading style sheet (CSS) attribute, you can include it as part of a style definition, or as an inline style attribute on the element tag. The values for this attribute are listed in Table 4-1. Values for -webkit-user-drag attribute: none: Do not allow this element to be dragged. element: Allow this element to be dragged. auto: Use the default logic for determining whether the element should be dragged. (Images, links, and text selections are the only elements that can be dragged.) This is the default value.
所有使用WebKit渲染引擎的浏览器都支持它，比如Chrome、更新版本的Opera、Safari等等。使用WebKit的移动浏览器的支持可能因移动操作系统而异。
试一试:
img {
pointer-events: none;
}
尽量避免
* {
pointer-events: none;
}
document.querySelectorAll("*").forEach((elem) => {
elem.setAttribute('draggable', false)
elem.addEventListener('dragstart', (event) => {
event.preventDefault()
})
})
这将禁用对所有元素的拖动。
