I'm trying to use promise to make error message to the console when Mongo connection doesn't work. i get an error: Cannot read properties of undefined (reading 'catch') how can i fix it? it supposed to work like that. i can use try & catch block but i prefer to know how to use it this way and what is wrong
mongoose
.connect(DB, {
useNewUrlParser: true,
useCreatIndex: true,
useFindAndModify: false,
})
.then(() => {
console.log('DB conecttion successful')
.catch(() => console.log('Error'));
});
const port = 3000;
app.listen(port, () => {
console.log(`app runing on port ${port}`);
});
catch should be after then not after console.
console.log will return undefined as it void function, that why the error "Cannot read properties of undefined" appear
mongoose
.connect(DB, {
useNewUrlParser: true,
useCreatIndex: true,
useFindAndModify: false,
})
.then(() => {
console.log('DB conecttion successful')
}).catch(() => console.log('Error'));;
const port = 3000;
app.listen(port, () => {
console.log(`app runing on port ${port}`);
});