Question

I m 创建火ox添加剂,在具体 but子中添加立克事件。 (“投入”部分)

The button is placed in http://example.com/welcome#_pg=compose but when I open the page, following error occures:

类型:文件.querySelector(“#send_top”)无效

#send_top is id of the button which I want to modify. So, the button is not found.

This error occurs because http://example.com/welcome and http://example.com/welcome#_pg=compose is completely different pages. In this case, the addon seems loading http://example.com/welcome but there is no button whose #send_top ID. When #_pg=compose anchor is added, the button is loaded by JavaScript.

• http://example.com/welcome#_pg=compose”rel=“nofollow” 修改纽伦?

Answer 1

Three thoughts to help you debug this:

为了正确匹配你应考虑使用定期表述而不是页面-格式的辛醇,这可能使你能够以更可预测的方式对 anchor作出反应。
我发现,在使用内容文字时,如果经过联合材料大量修改,你可以处理时间问题。粗体工作或许是寻找你想要的成分,如果是的话,则为100毫米秒钟左右,然后重新检查。举例来说,“是”,但“我”在使用新的“前线”时使用。
You can use the unsafeWindow variable in your content script to directly access the page s window object - this object will contain any changes JS has made to the page and is not proxied. You should use unsafeWindow with great caution however as its use represent a possible security problem. In particular, you should never trust any data coming from unsafeWindow, ever.