Why did not into then

[jiucheng-front]

On node-7z(0.2.0), As follows, why did not into then? It into catch, But add success
sevenZip.add('WJF001.zip', allLogPath).progress(function(res) {
console.log(res, '111');
}).then(function() {
console.log('222');
}).catch(function(err) {
console.log(err, '333');
});

[twok020101]

My understanding is, it's not async/await (promise) function. This library triggers events from childProcess which is then retrieved using 'on' method. Hence '.then' or '.catch' wont work, instead you can use

myStream.on('err',(err)=>{console.log(err)});
myStream.on('end',(res)=>{consoole.log('222'});