The JavaScript exception "return (or yield) not in function" occurs when a return
or yield
statement is called outside of a function.
SyntaxError: return not in function
Message
SyntaxError: 'return' statement outside of function (Edge) SyntaxError: return not in function (Firefox) SyntaxError: yield not in function (Firefox)
Error type
What went wrong?
Examples
Missing curly brackets
var cheer = function(score) { if (score === 147) return 'Maximum!'; }; if (score > 100) { return 'Century!'; } } // SyntaxError: return not in function
The curly brackets look correct at a first glance, but this code snippet is missing a {
after the first if
statement. Correct would be:
var cheer = function(score) { if (score === 147) { return 'Maximum!'; } if (score > 100) { return 'Century!'; } };
See also
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_return_or_yield