浏览器上下文菜单自定义？
有没有办法在文本区域上覆盖浏览器右键上下文菜单中的“撤消”和“全选”？
谢谢。
Is there a way to override the "undo" and "select all" in right click context menu of the browser over textarea?
Thank you.
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您无法编辑浏览器的内置上下文菜单，但可以使用
window对象上的oncontextmenu事件禁用它并用您自己的上下文菜单替换它。我要提醒大家的是，这通常是一个坏主意。用户希望找到内置的上下文菜单，但当它不存在时常常会感到沮丧。You cannot edit the browser's built-in context menu, but you can disable it and replace it with your own using the
oncontextmenuevent on thewindowobject. I would caution that this is often a bad idea. Users expect to find the built-in context menu and are often frustrated when it isn't there.我知道你可以通过注册 click() 事件来阻止整个上下文菜单打开，执行一些跨浏览器的繁琐操作来获取哪个按钮被单击，然后如果单击了正确的按钮则返回 false。
但是，我认为不可能修改上下文菜单本身，至少不能使用 JavaScript。
我应该补充一点，您可能需要重新思考为什么要这样做。这永远不会成为对任何事情的保护（有些人试图阻止从他们的网站复制图像），因为它可能只是通过关闭 JavaScript 来禁用。
更新：好的，所以你不想阻止用户做事，让他们按照你的方式做事。然后，我想最好的做法是：
您在另一条评论中提到您无法复制复制/粘贴，这是正确的，但您可以实现自己的剪贴板（这只适用于您的网络应用程序）。如果你真的有必要的话。
I know you can prevent the whole context menu from opening by registering to the click() event, doing some cross-browser mumbo-jumbo to get wich button was clicked, and then return false if the right one was clicked.
However, I don't think it's possible to modify the context menu itself, at least not using javascript.
I should add that you may want to rethink why you're doing this. This will never be a protection against anything (some try to prevent copying images from their website), as it may simply be disabled by turning javascript off.
UPDATE: Ok, so you don't want to prevent users to do things, bug have them doing things your way. Then, I guess the best thing to do is :
You mentionned in another comment that you cannot reproduce copy/paste, which is correct, but you can implement you own clipboard (that will only work for your webapp) if you really have to.