如何从后台页面获取当前tabId？current tabId是用户可以看到其内容的选项卡.
background.html
<html>
<head>
<script>
if(typeof localStorage.state == 'undefined')
localStorage.state = 'off'
chrome.browserAction.onClicked.addListener(function(tab) {
if(localStorage.state == 'on')
{
localStorage.state = 'off';
}
else
{
localStorage.state = 'on';
}
chrome.browserAction.setBadgeText({text: localStorage.state, tabId: tab.id});
chrome.tabs.sendRequest(tab.id, {state: localStorage.state});
//chrome.tabs.sendRequest(tab.id, {state: localStorage.state});
});
</script>
</head>