我正在尝试从网页中访问一些DOM元素:
<html>
<button id="mybutton">click me</button>
</html>
我想通过Chrome扩展访问innerHTML(“click me”):
chrome.browserAction.onClicked.addListener(function(tab) {
var button = document.getElementById("mybutton");
if(button == null){
alert("null!");
}
else{
alert("found!");
}
});
当我点击扩展时,弹出窗口显示:“null”。
我的manifest.json:{
"name": "HackExtension",
"description": "Hack all the things",
"version": "2.0",
"permissions": [
"tabs", "http://*/*"
],
"background": {
"scripts": ["contentscript.js"],
"persistent": false
},
"browser_action": {
"scripts": ["contentscript.js"],
"persistent": false
},
"manifest_version": 2
}