32

I have written an angularjs factory as below

module.factory('LogService', function () {

    function log(msg) {
        console.log("Rahkaran:" + new Date() + "::" + msg);
    }

    return 
    {
        log: log
    };

});

But I kept getting this error

Provider 'LogService' must return a value from $get factory method

I googled about the error and I couldn't find any solution.

Coincidentally I changed the return statement to this

return{
    log: log
};

And error is gone!!

Is there any differences between having { in front of return or at the next line?

Naeem Shaikh
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Reza
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2 Answers2

42

This is called Automatic semicolon insertion

The return statement is affected by automatic semicolon insertion (ASI). There is no line terminator ; between the return keyword and the expression allowed.

return
a + b;

// is transformed by ASI into

return; 
a + b;

So you must insert { in front of return and Not at the next line.

Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return

Naeem Shaikh
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1

In your case there will be always a non-undefined value returned. But in other cases the issue might be also that you do return null or undefined value from the factory.

gringo_dave
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