// step1: create zim instance
var appID = 0;
var appSign = '';
ZIM.create({ appID, appSign });
var zim = ZIM.getInstance();

// step2: register callback function
zim.on('peerMessageReceived', function (zim, { messageList, info, fromConversationID }) {
console.log('peerMessageReceived', messageList, fromConversationID);
});

// step3: login
var userID = 'xxxx';
var loginConfig = { userName: 'xxxx', token: '' };
zim.login(userID, loginConfig)
.then(function () {
// success
})
.catch(function (err) {
// failed
});

// step4: send peer text message
var toUserID = 'xxxx1';
var config = {
priority: 1 // priority，low:1, medium:2, high:3
};