运用 background_page , browser_action 以及 tabs
展示每个标签的语言
{
"name": "CLD",
"description": "Displays the language of a tab",
"version": "0.2",
"background": {
"scripts": ["background.js"]
},
"permissions": [
"tabs"
],
"browser_action": {
"default_name": "Page Language"
},
"manifest_version": 2
}
// Copyright (c) 2009 The Chromium Authors. All rights reserved. Use of this
// source code is governed by a BSD-style license that can be found in the
// LICENSE file.
var selectedId = -1;
function refreshLanguage() {
chrome.tabs.detectLanguage(null, function(language) {
console.log(language);
if (language == " invalid_language_code")
language = "???";
chrome.browserAction.setBadgeText({"text": language, tabId: selectedId});
});
}
chrome.tabs.onUpdated.addListener(function(tabId, props) {
if (props.status == "complete" && tabId == selectedId)
refreshLanguage();
});
chrome.tabs.onSelectionChanged.addListener(function(tabId, props) {
selectedId = tabId;
refreshLanguage();
});
chrome.tabs.getSelected(null, function(tab) {
selectedId = tab.id;
refreshLanguage();
});