Content-script 发消息给后台

content-script 发消息给后台步骤如下

content-script.js

/* content-script */
console.log('content-script 运行了 ...');
// 发消息给后台演示
chrome.runtime.sendMessage(
    {greeting: '你好,我是 content-script ,我主动发消息给后台!'}, 
    function(response) {
	    console.log('收到来自后台的回复:' + response);
    }
);

background.js

// background.js
// 监听来自消息
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse)
{
	console.log('收到消息:');
	console.log(request, sender, sendResponse);
	sendResponse('我是后台,我已收到你的消息:' + JSON.stringify(request));
});