问题描述
我正在编写一个Chrome扩展程序，需要在加载时更改流行的Web应用程序。不幸的是，该Web应用程序的大多数用户界面都在iframe中呈现，虽然该iframe的地址与我的 content_scripts 匹配声明相匹配，但只会为用户脚本顶部框架。
I'm writing a Chrome extension that needs to alter a popular web app when loaded. Unfortunately, most of the UI of that web app is rendered inside an iframe, and although the address of that iframe matches my content_scripts match declaration, the user script only gets invoked for the top frame.
问：是否有方法从Chrome内容脚本扩展中访问iframe中呈现的HTML？如果是，我应该指定什么权限和其他清单选项？谢谢。
Q: Is there a method of accessing HTML rendered inside an iframe from a Chrome content script extension? If yes, what permissions and other manifest options should I specify? Thanks.
推荐答案
我解决了这个问题。必须在manifest.json的content_scripts部分中指定以下选项：all_frames：true 。没有它，该脚本只适用于顶部框架。
I've resolved the problem. The following option has to be specified in the content_scripts section of the manifest.json: "all_frames": true. Without it, the script is only applied to the top frame.
//有时只需要仔细阅读RTFM。
// Sometimes one just has to RTFM carefully.
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