I'm using WebStorm and I'm getting an error that I can't understand. Node.js + MongoDB.
var mongoose = require('mongoose');
mongoose.Promise = global.Promise;
mongoose.connect(' mongodb://localhost:27017/TodoApp');
var Todo = mongoose.model('Todo', {
text: {
type: String
},
completed: {
type: Boolean
},
completedAt: {
type: Number
}
});
var newTodo = new Todo({
text: 'Cook dinner'
});
The problem is in this block:
newTodo.save().then((doc) => {
console.log('Saved todo', doc);
}, (e) => {
console.log('Unable to save todo')
})
P.S.: The code works fine.
2 Answers
You need to change JavaScript Language Version to ES6. Changing this setting should fix the issue:
In some scenarios, you might need to restart your IDE for the changes to reflect properly.
The problem is that WebStorm will show a warning if that statement isn't doing any of the following within a function:
- Calling another function
- Making any sort of assignment
- Returning a value
- (There may be more, but those are the ones I know of)
In other words, WebStorm views that function as unnecessary and tries to help you catch unused code.
For example this will show the warning:
const arr = [1, 2];
const willShowWarning = arr.map(num => {
num + 1;
});
Adding a return will take the warning away:
const arr = [1, 2];
const willNotShowWarning = arr.map(num => {
return num + 1;
});
The answer is not to change WebStorm settings.
