angular-cli Error in ./AppComponent class AppComponent Unexpected token u in JSON

Asked Apr 04 '17 at 09:50

Active Apr 04 '17 at 09:55

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I have an angular 2 project using the angular-cli. I want to get a collegue setup using the project, so I have them checking out the angular-cli project and am trying to get it working on their machine.

The app starts up using 'ng serve'. However,when trying to convert json as follows:

let a = <any>JSON.parse(b);

It gives this error:

Unhandled Promise rejection: Error in ./AppComponent class AppComponent - inline template:3:2 caused by: Unexpected token u in JSON at position 0 ; Zone: <root> ; Task: Promise.then ; Value:

The problem looks a bit similar to this one. However, the answers all refer to system.config, whereas I am using the angular-cli.

edited May 23 '17 at 11:46

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asked Apr 04 '17 at 09:50

trees_are_great

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Have you had a look in the compiled output of AppComponent? Your question includes to little information for us to help you with your problem – Hampus Apr 04 '17 at 09:54
b is undefined. Therefore the unexpected token u(ndefined) – Hampus Apr 04 '17 at 09:56
I am able to log b before the convert and the value is "Teacher". I have checked and the app works if I comment at the two JSON.parse lines – trees_are_great Apr 04 '17 at 10:05
However, if I add an is null check then the problem is solved - perhaps it was null before. You're answer seem correct. Thank you very much for your help with this – trees_are_great Apr 04 '17 at 10:09
actually, the error is still occurring – trees_are_great Apr 04 '17 at 10:12
my issue that I was getting Json from local storage and it was returning: 'undefined'. I was checking to see it it was null, which also checks to see if the variable is undefined, but I need to check if it was equal to the string 'undefined'. – trees_are_great Apr 04 '17 at 10:24
Glad you solved it. I was having lunch. – Hampus Apr 04 '17 at 10:51
Thanks Hampus :) – trees_are_great Apr 04 '17 at 12:20

angular-cli Error in ./AppComponent class AppComponent Unexpected token u in JSON

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