我正在创建一个 chrome 扩展我用 1.background.js 2.icon.png 3.icon2.png 4.manifest.json 5.myscript.js 创建了一个目录
我的 manifest.json 代码是
{
"manifest_version": 2,
"name": "One-click Kittens",
"description": "This extension demonstrates a browser action with kittens.",
"version": "1.0",
"background": {
"scripts": ["background.js"]
},
"permissions": [ "storage"],
"content_scripts": [
{
"matches": ["http://*/*"],
"js": ["myscript.js"]
}
],
"browser_action": {
"default_icon": "icon.png"
}
}
作为内容脚本的 myscript.js 的代码是
document.body.innerHTML=''+document.body.innerHTML+'' ; var iframe = document.getElementById("frame1"); 函数 addevent(){ chrome.extension.sendMessage({change: "icon"}, function(response) { console.log(response.resp); });
} iframe.onload = function(){ var iframeDocument = iframe.contentDocument || iframe.contentWindow.document; if(iframeDocument != null) {var bb=iframeDocument.getElementById('mybutton'); if(bb != null) { bb.addEventListener("click",addingevent,false) alert("Hello World"); }} }
background.js 的代码是
chrome.extension.onMessage.addListener(
function(request, sender, sendResponse) {
console.log("from a content script:from the extension");
chrome.storage.local.get("icon",function(val){
if(val.icon == "icon1")
{chrome.browserAction.setIcon({"path" :"icon2.png"},function(){});
chrome.storage.local.set({"icon":"icon"},function(){});
}
else
{chrome.browserAction.setIcon({"path" :"icon.png"},function(){});
chrome.storage.local.set({"icon":"icon1"},function(){});
}
});
sendResponse({resp: "success"});
});
此扩展的目的是当用户单击从 url http://onemoredemo.appspot.com/加载的框架中的按钮时, 图标应在 icon.png 和 icon2.png 之间切换
当我将它加载到带有 url http://onemoredemo.appspot.com/的网页中时,此扩展程序完美运行,创建了框架,当我单击按钮时它正在更改图标,但是当我打开 url stackoverflow.com 时,框架被创建并显示按钮在其中,但是当我单击按钮图标保持不变时,我希望该图标将被更改而不管 url 为什么它在其他 url 中没有改变?请说明原因