Chrome插件中 popup,background,contentscript消息传递机制

https://blog.csdn.net/summerxiachen/article/details/78698878

popup不能接收到contentscript 发送的消息, 如果这时contentscript还使用了消息回调参数, 则会收到 Unchecked runtime.lastError: The message port closed before a response was received.错误消息