在Firefox插件上获取输入元素的值 [英] Get value of an input element on a firefox addon

问题描述

我如何在main.js中获取此输入元素的值:

How i can fetch the value of this input element in my main.js:

<input type="hidden" value="12124054" id="ctl00_cphContent_hdnID" name="ctl00$cphContent$hdnID">

我尝试了var id = document.getElementById("ctl00_cphContent_hdnPlayerID").value;和contentWindow.document.getElementById("ctl00_cphContent_hdnPlayerID").focus();，但是我收到了文档和contentWindows无法识别的错误:(

I tried var id = document.getElementById("ctl00_cphContent_hdnPlayerID").value; and contentWindow.document.getElementById("ctl00_cphContent_hdnPlayerID").focus(); but i am getting errors that document and contentWindows are unidentified :(

推荐答案

您需要使用内容脚本从页面获取值，然后将该值发送给main.js-这是因为Web内容固有地不受信任.插件SDK.有关如何使用内容脚本的更多信息，请参阅以下文档:

You need to get the value from the page using a content script and then send the value to main.js - this is because web content is inherently untrusted by the addon-sdk. Please see these docs for more on how to use content scripts:

这里是Builder上的一个示例附加组件，它显示了如何将内容脚本中的值传递回main.js.在这种情况下，我使用xui库更轻松地将事件绑定到pgae中.

Here is an example add-on on Builder that shows how to pass values frmo the content script back to main.js. In this case I'm using the xui library to more easily bind events in the pgae.

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