Safari扩展运行多次注入javascript

我已经在Apple Developer站点上复制了以下示例中的代码.

https://developer.apple.com/library/content/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html#//apple_ref/doc/uid/TP40009977-CH14-SW1

当我运行扩展时,它会正常运行,除了注入的脚本运行3次,导致输出被写入console.log 3次.我还在doBigCalc函数中发出警报,它打开了3个警报.

为什么会发生/它应该发生？

解决方法:

您没有说明您的实现,但可能是您的代码不是问题.关键是要了解注入的脚本已加载….从injected script documentation：

Scripts are injected into the top-level page and any children with HTML sources, such as iframes. Do not assume that there is only one instance of your script per browser tab.

标签：safari-extension,javascript,safari
来源： https://codeday.me/bug/20190827/1740150.html