fn1().then(function(res){
console.log(res)
return fn2(res).then(function(res){
console.log(res)
},function(err){
console.log(err)
})
}).catch(function(res){
return fn3(res).then(function(res){
console.log(res)
},function(err){
console.log(err)
})
})
fn1 executes and takes different routes according to the returned result. If return fn2, fails, return fn3, seems to start to nest again. Is there a better way to write it?
you can try to change the parameters
function p(bool, msg) {
return new Promise(function (resolve, reject) {
setTimeout(function () {
if (bool) resolve(msg);
else reject(msg);
}, 1000)
})
}
p(true, 'true').then(function (res) {
console.log(res);
return p(true, 'then');
}).catch(function (res) {
console.log(res);
return p(true, 'catch');
}).then(function (res) {
console.log(res);
}).catch(function (res) {
console.log(res)
}) if you have babel, go to async/await. If not,
is at most more comfortable to split into subfunctions.
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