使用loadFrameScript,如何在执行页面脚本之前注入文件? [英] Using loadFrameScript, how can inject file before the page's script execution?
问题描述
我当前在 bootstrap.js
文件中使用它.在我使用 recentBrowserWindow.messageManager.loadFrameScript(file,true)
:
I'm currently using this in the bootstrap.js
file. Is used to edit the client's JavaScript code in my case I'm using recentBrowserWindow.messageManager.loadFrameScript(file, true)
:
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import('resource://gre/modules/Services.jsm');
var file = 'chrome://testAddon/content/inject.js';
function startup(aData, aReason) {
var recentBrowserWindow = Services.wm.getMostRecentWindow('navigator:browser');
if(recentBrowserWindow.document.readyState == 'complete') {
recentBrowserWindow.messageManager.loadFrameScript(file, true);
}
}
inject.js:
var window = content;
var pageJS = window.wrappedJSObject;
console.log("jQuery is defined:", "jQuery" in window);
//true, jQuery is already assigned on client page.
但是这里的脚本 inject.js
在客户端页面之后运行.问题是:
But here the script inject.js
is running after of the client page. The question is:
如何在执行页面脚本之前注入
inject.js
?我应该使用哪种方法?
How can inject
inject.js
just before the page's script execution?. What method should I use?
推荐答案
来自:它说要使用 document-element-inserted
,这将确保您的脚本在页面脚本运行之前运行.
It says to use document-element-inserted
, this will ensure your script runs before the page scripts run.
我对框架脚本没有太多的经验,其他人将不得不对此进行验证.
I don't have much experience with frame scripts, others will have to verify me on this.
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