Javascript 即使用户导航到另一个页面,如何将内容脚本插入到选项卡中?
我正在开发一个Chrome扩展,其中有popup.js、background.js和myscript.js(内容脚本)。每当我点击扩展图标时,它就会通过browserAction启动一个新的panel类型的窗口。然后,当我单击面板窗口中的“录制”按钮时,popup.js会将一条消息传递给background.js: popup.js:Javascript 即使用户导航到另一个页面,如何将内容脚本插入到选项卡中?,javascript,jquery,google-chrome,google-chrome-extension,Javascript,Jquery,Google Chrome,Google Chrome Extension,我正在开发一个Chrome扩展,其中有popup.js、background.js和myscript.js(内容脚本)。每当我点击扩展图标时,它就会通过browserAction启动一个新的panel类型的窗口。然后,当我单击面板窗口中的“录制”按钮时,popup.js会将一条消息传递给background.js: popup.js: $(“#rcrd_btnr”)。单击(功能(ee) { 警报(“即将开始重新编码”); //将消息从popup.js发送到background.js chrome
$(“#rcrd_btnr”)。单击(功能(ee)
{
警报(“即将开始重新编码”);
//将消息从popup.js发送到background.js
chrome.runtime.sendMessage({from:'record'});
“rcrd_btn_blue”是一个按钮,用于停止记录页面上的事件//
$(“#rcrd_btn_red”).hide();
$(“#rcrd_btn_blue”).show();
});
此外,background.js将消息传递给myscript.js(内容脚本)
background.js:
if(request.from=='record')
{
chrome.browserAction.setBadgeBackgroundColor({tabId:actvTabId,color:“green”});
chrome.browserAction.setBadgeText({tabId:actvTabId,text:'R'});
chrome.tabs.query({active:true},函数(tabs)
{
对于(var i=0;i我已经解决了这个问题。我所做的是,我有一个监听器来检查我的myscript.js和chrome.onUpdatedAPI中的background.js中单击的对象是否是超链接。每当用户单击超链接时,就会将消息发送到chrome.onUpdatedAPI中的background.js其中我使用了setTimeout,它再次注入了myscript.js内容脚本就像页面的附加脚本(即使它在单独的环境中运行)因此,当导航到另一个页面时,页面本身被破坏时,它无法存活。您必须使用例如chrome.tabs.onUpdated在后台页面脚本中跟踪url导航。我相信StackOverflow上有很多这样的例子,祝您好运找到它们。或者可能有人会在此处发布定制的答案。好的谢谢…将给它一个机会…并让您知道..请回答主题中的问题:包括一个完整的复制问题。通常,包括manifest.json、一些背景和内容脚本。寻求调试帮助的问题(“此代码为什么不工作?”)必须包括:►想要的行为,►特定的问题或错误,以及►在问题本身中复制内容所需的最短代码。没有明确问题陈述的问题对其他读者没有用处。请参阅:“如何创建”,和。具体而言:您不显示内容脚本如何或为什么注入页面。您要求我们向您展示如何“保持内容脚本注入”。即使这样做是不可能的(请参阅wOxxOm的评论),但我们如何提出建议,以便从功能的角度来看,当您没有在内容脚本中首先显示内容脚本是如何注入的时,您能够接近它,为什么您有var ele=document.getElementsByTagName(event.target.nodeName);
?您的评论说它是为了获取被单击的元素。但是,您已经将该元素作为event.target
。使用event.target.nodeName
来获取要从中查找event.target
的节点列表是没有意义的。即使这样做有意义,您也永远不会使用ele
变量,因此它不需要存在。
var rcrd_btn_cntr=0;
$(document).ready(function() {
//listen mssage from record_button_red
$("#rcrd_btnr").click(function(ee)
{
//alert('about to start recoding');
//send message from record_to_background
chrome.runtime.sendMessage({from : 'record'});
// console.log(ws);
$("#rcrd_btnr").hide();
$("#rcrd_btnb").show();
});
//listen mssage from record_button_blue
$("#rcrd_btnb").click(function(ee)
{
alert('about to stop recoding');
$("#rcrd_btnb").hide();
$("#rcrd_btnr").show();
//send messagee from record_Button_stop
chrome.runtime.sendMessage({from : 'cancel'});
});
//Listens for message coming from background
chrome.runtime.onMessage.addListener(function (answer)
{
if(answer.from === 'b_r_m_background')
{
if(typeof(answer) != 'undefined')
{
var row = '<tr><td>'+answer.command+'<td>'+answer.target+'<td>'+answer.value;
$('#mytbl').append(row);
console.log(answer.msg)
//alert(answer.msg);
}
}
});
});
//create new window of type panel
var run =0;
var win_id;
var ifClosed=1;
var vid=0;
var xx ;
var actvTabId;
chrome.browserAction.onClicked.addListener(function(tab)
{
chrome.tabs.getSelected(null, function(tab) {
actvTabId = tab.id
});
chrome.windows.getCurrent(function(win)
{
xx = win;
if(run==0 && ifClosed ==1)
{
chrome.windows.create({ type:"panel",url: "index.html","width" : 400,"height" : 600}, function(win)
{
win_id = win.id;
// alert('creating '+win_id);
run++;
ifClosed=0;
});
}
else if(ifClosed == 0)
{
//alert('updating '+win_id);
chrome.windows.update(win_id, {focused: true});
}
});
});
//listen for a message coming from panel_window
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse)
{
if(request.from == 'cancel')
{
//sending to active tab (myscript) from back
//console.log('sending to myscript from back_cancel');
//console.log(sender);
chrome.tabs.query({active:true}, function(tabs)
{
for(var i=0;i<tabs.length;i++)
{
if(tabs[i].selected == true)
{
//chrome.tabs.update(tabs[i].id, {selected: true});
//send to active tab to myscript from back_cancel_button
chrome.tabs.sendMessage(tabs[i].id, {from : 'btn2_2_cancel'}, function(response) {});
}
}
});
//console.log('sent from back.js');
}
//listen incoming from panel_window_record_button
else if(request.from === 'record')
{
chrome.tabs.query({active:true}, function(tabs)
{
for(var i=0;i<tabs.length;i++)
{
if(tabs[i].selected == true)
{
//chrome.tabs.update(tabs[i].id, {selected: true});
//sending to active tab (myscript) from back
try
{
//send to active tab to myscript from backgrund_record
chrome.tabs.sendMessage(tabs[i].id, {from : 'btn_record',win_id:xx.id}, function(response) {});
}
catch(e)
{
alert('record background send failed');
}
}
}
});
}
//listen incoming from active tab from myscript for logging events
else if ( request.from =='btn_record_myscript' )
{
//send to panel window from background for logging events
chrome.runtime.sendMessage({from:'b_r_m_background',msg : request.msg});
}
});
//when panel_window is closed
chrome.windows.onRemoved.addListener(function (event)
{
chrome.browserAction.setBadgeText({tabId : actvTabId,text: ''});
ifClosed = 1;
run=0;
//alert(ifClosed);
//alert('window is closed');
chrome.tabs.query({active:true}, function(tabs)
{
for(var i=0;i<tabs.length;i++)
{
if(tabs[i].selected == true)
{
chrome.tabs.sendMessage(tabs[i].id, {from : 'btn2_2_cancel'}, function(response) {});
}
break;
}
});
});
var cntr=0;
var cbtr2=0;
var typed = '';
var tp='null';
var isFirstTime=0;
$(document).ready(function()
{
//listen for incoming from background
chrome.extension.onMessage.addListener(function (message,sender, sendResponse)
{
//listen incoming from cancel_button_background_panel_window
if(message.from === 'btn2_2_cancel')
{
//console.log('cencelling');
//in case of 'panel window close' or 'cancel button click' unbind all events from page
$('body').unbind('mouseover');
$('body').unbind('mouseout');
$('body').unbind('click');
$('body').unbind('keydown');
}
else if(message.from === 'btn_record')
{
current_loc = window.location.href;
$( "body" ).click(function( event )
{
//find element being clicked
var ele = document.getElementsByTagName(event.target.nodeName);
// alert('sending from click');
chrome.runtime.sendMessage({from : 'btn_record_myscript',msg : ele[0]});
});
//change event for 'input type=text'
var key_detect;
$("input").change(function(eventChange)
{
var ele = document.getElementsByTagName(eventChange.target.nodeName);
//key detect event
$("body").keydown(function (eventKey)
{
key_detect = eventKey.key;
});
//check if user has pressed enter
if(key_detect == 13 || eventChange.type == 'change')
{
typed = eventChange.target.value;
// alert('sending from type');
chrome.runtime.sendMessage({from : 'btn_record_myscript', msg : ele});
}
});
}
else
{
alert('error');
}
});
////////onMessage Listener ends///////////
});
<!doctype html>
<html lang="en">
<head>
<script src="jquery.js"></script>
<script src = "popup.js"></script>
<meta charset="utf-8">
<title>My AddOn</title>
<link rel="stylesheet" type="text/css" href="mycss.css"/>
</head>
<body >
<div>
<input type="button" value="Re" id ="rcrd_btnr" name="record" style="position:absolute;left:40%;text-align: center;background-color : red ;text-decoration: bold;font-size: 10px;padding:10px 10px;border: none;color: white;cursor: pointer;border-radius:100%"/>
<input type="button" value="Re" id ="rcrd_btnb" name="record" hidden style="position:relative;left:40%;text-align: center;background-color : blue ;text-decoration: bold;font-size: 10px;padding:10px 10px;border: none;color: white;cursor: pointer;border-radius:100%"/>
</div>
</body>
</html>
{
"name": "TestExtension",
"version": "1.0.0",
"manifest_version": 2,
"description" : "Test Descr.",
"icons": { "48": "bear.png"},
"browser_action": {
"default_icon": { "16": "bear.png", "32": "bear.png" },
"default_title": "Test Addon"
},
"permissions": ["tabs"],
"background": {
"scripts": ["background.js"]
},
"content_scripts": [{
"matches": ["http://*/*", "https://*/*"],
"js": ["jquery.js","popup.js","myScript.js"]
}]
}