使用扩展程序的工具栏项时收到通知的最佳方式是什么？
我想在使用 toolbaritem 时设置 label 属性和事件侦听器。因为即使我将扩展程序的 toolbaritem 添加到 document.getElementById 也找不到它，除非它正在使用中。目前，我在导航栏和附加栏上有 DOMNodeInserted 事件侦听器，用于设置我的 toolbaritem 的属性，但我想知道是否有更好的方式？
I want to setup label attributes, and event listeners for a toolbaritem when it's being used. Because even though I add my extension's toolbaritem to <toolbarpalette id="BrowserToolbarPalette"> it is not found by document.getElementById unless it is being used. At the moment I have DOMNodeInserted event listeners on the navigation bar and add-on bar which sets up my toolbaritem's attributes, but I'm wondering if there is a better way?
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您是否太早调用
document.getElementById（可能在 Firefox 将项目添加到工具栏中之前）？如果是这样，您可能希望将代码移动到注册为在主浏览器窗口上的"load"事件上调用的函数。这应该确保在代码运行时浏览器（包括工具栏）已成功构建。Are you calling
document.getElementByIdtoo early, possibly before Firefox has added the item into the toolbar? If so, you might want to move your code to a function which is registered to be called on the"load"event on the main browser window. This should ensure that the browser, including the toolbar, has been successfully built by the time your code runs.请查看广播者和观察者。我想这会对你有帮助。
Have a look at Broadcasters and Observers. I think this will help you.