longbow-messenger.js v0.8.12

Messenger.js

A browser side event-bus.

IE9+

two-way data transfer.

promise response supported.

cross domain and iframe.

encrypted communication data and channel.

Install

script tag:

<script src="./messengerjs.min.js" ></script>

npm:

npm i longbow-messenger.js

API

//Supose in pageA
//post an event with a name of 'ask_for_sum', and two parameters: 1, 2.
messenger.emit('ask_for_sum', 1, 2).onResponse((result)=>{
     //if somepage is subscribing to this event-name and post it's response back, then it should be received at here:
     console.log('sum:', result)// sum: 3
});

//subscribe event and send result back:
messenger.listen('ask_for_sum', (num1, num2)=>{
   return num1+num2;
});

//also ok to return promise instance, in case of async scenarios
messenger.listen('ask_for_sum', (num1, num2)=>{
    var promise = new Promise((resolve, reject)=>{
        setTimeout(()=>{//async process
            resolve(num1+num2);//send result back to requester
        }, 2000)
    })
    return promise;
})

//stop listen
messenger.stopListen('ask_for_sum');

//use 'msgInfo' to do more things!
messenger.emit('ask_for_sum', 1, 2).onResponse((result, msgInfo)=>{    
     //print result     
     console.log('sum:', result);
     
     //count receive times
     console.log('received result count: ', msgInfo.count);  
     
     //stop receiving
     if(msgInfo.count >= 2){
          msgInfo.stopReceive();
     }
})

License

MIT:

http://www.opensource.org/licenses/mit-license.php