如何从Firefox插件编辑`窗口`属性？ [英] How to edit a property on `window` from Firefox addon?
问题描述
我想做一个插件来修改窗口中的一个值。
让我们举个例子简单的窗口：
< html>
< head>
< title>< / title>
< script>
window.hello = 1;
< / script>
< / head>
< body>
< / body>
< / html>
使用
gBrowser.addEventListener（DOMContentLoaded，
function（e）
{
e.originalTarget.defaultView.hello = 2;
}，false）;
不会修改的值window.hello 。含义 e.originalTarget.defaultView！= window 。
如何访问纯窗口？
e.target.defaultView 。但是，为了保持Mozilla安全协议的界限，您必须通过 wrappedJSObject 属性来访问窗口对象。总的来说，你可以改变这个变量： e.target.defaultView.wrappedJSObject.hello = 2
I want to make an addon that modifies one value on the window.
Let's take for example a simple window:
<html>
<head>
<title></title>
<script>
window.hello = 1;
</script>
</head>
<body>
</body>
</html>
Using
gBrowser.addEventListener("DOMContentLoaded",
function (e)
{
e.originalTarget.defaultView.hello = 2;
}, false);
does not modify the value of window.hello. Meaning e.originalTarget.defaultView != window.
How can I access the pure window?
e.originalTarget refers to the document element of that page. To access the window element of the page, you use e.target.defaultView. However, in order to stay withing the bounds of Mozilla's security protocols, you must access the window object through its wrappedJSObject property. Overall, you'd change the variable like:
e.target.defaultView.wrappedJSObject.hello = 2
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