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JavaScript

jason limmm
jason limmm
8,009 Points
Posted by jason limmm
jason limmm
8,009 Points

error is not defined error

app.use((req, res, next)=>{
    const error = new Error('uh no!!!! no money for us!!!');
    res.status(error.status);
    next(error);
});

app.use((err, req, res, next)=>{
    res.locals.error = error;
    res.render('error', error);
});

the app says that 'error' is not defined i don't know what's the problem

1 Answer

Steven Parker
Steven Parker
231,265 Points
Steven Parker
Steven Parker
231,265 Points

It's not clear what course and lesson you are referring to, but one issue stand out in the code itself. The first function defines "error", but its scope is local to that function only.

The second function tries to reference it (res.locals.error = error), but it would not be defined at that point.

jason limmm
jason limmm
8,009 Points
jason limmm
jason limmm
8,009 Points

can i put the error variable outside both the functions so that it's not only local to one function

something like this

const error = new Error('uh no!!!! no money for us!!!');

app.use((req, res, next)=>{
    res.status(error.status);
    next(error);
});

app.use((err, req, res, next)=>{
    res.render('error', error);
});
Steven Parker
Steven Parker
231,265 Points
Steven Parker
Steven Parker
231,265 Points

Anything declared in the global (outside) scope should be available to any function that doesn't shadow it (by having a local variable or parameter of the same name).