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I am trying to execute javascript on a page when I click on a button in popup.html. I tried to use such a way:
In background.js:
chrome.tabs.onUpdated.addListener(function(tabId, changeInfo){
if(changeInfo.status == "loading") {
insert(tabId);
}
});
function insert(tabId) {
chrome.tabs.get(tabId, function(tab) {
$('button').click(function() {
chrome.tabs.executeScript(tab.id, {file: 'js/alert.js'});
});
});
}
Alert.js consists only of one string: alert('works');
Alert is just an example. Real script should do some DOM manipulation with opened tab after user clicks on a button im popup.html.
238
I wrote a demo for your need.
https://gist.github.com/greatghoul/8120275
alert.js
alert('hello ' + document.location.href);
background.js
// empty file, but needed
icon.png
manifest.json
{
"manifest_version": 2,
"name": "Click to execute",
"description": "Execute script after click in popup.html (chrome extension) http://stackoverflow.com/questions/20764517/execute-script-after-click-in-popup-html-chrome-extension.",
"version": "1.0",
"icons": {
"48": "icon.png"
},
"permissions": [
"tabs", "<all_urls>"
],
"browser_action": {
"default_icon": "icon.png",
"default_popup": "popup.html"
},
"background": {
"scripts": ["background.js"],
"persistent": false
}
}
popup.html
<!DOCTYPE html>
<html>
<body style="width: 300px">
Open <a href="http://stackoverflow.com" target="_blank">this page</a> and then
<button id="clickme">click me</button>
<script type="text/javascript" src="popup.js"></script>
</body>
</html>
popup.js
// var app = chrome.runtime.getBackgroundPage();
function hello() {
chrome.tabs.executeScript({
file: 'alert.js'
});
}
document.getElementById('clickme').addEventListener('click', hello);
You can also use Messaging:
in popup.js
document.getElementById("clicked-btn").addEventListener("click", function(e) {
chrome.runtime.sendMessage({'myPopupIsOpen': true});
});
in background.js
chrome.runtime.onMessage.addListener(function(message, sender) {
if(!message.myPopupIsOpen) return;
// Do your stuff
});
Not tested but should works, further informations about Messaging.
40
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