Angular js - is printing FALSE value as string

Question

i'm simply trying printing out a param value that is FALSE, and it prints out "false" as plain text, quite unbelievable... any clue ?

   $rootScope.session = {
                "username" : $window.localStorage['user_username'] || false,
                "id_user" : $window.localStorage['user_id'] || false,
                "token" : $window.localStorage['user_session_token']
            }
    //in view
    <div>{{session.username}}</div>

Quite remarkable indeed, good sir. What does it print if you replace `|| false` with `|| 'Whiskey'`? (I'm wondering where the capital `F` is coming from) — Cerbrus, Feb 18 '14 at 10:19
@Teemu i expect nothing printed out, empty since it's false ! — itsme, Feb 18 '14 at 10:23
if the `localStorage['user_username']` is empty, this code will set `session.username` to `false`. — Cerbrus, Feb 18 '14 at 10:26
@Cerbrus yeah but printing that will return a "false" string — itsme, Feb 18 '14 at 10:28

score 3 · Accepted Answer · answered Feb 18 '14 at 10:24

3

Try to use ng-if directive:

<div ng-if="session.username">{{session.username}}</div>

answered Feb 18 '14 at 10:24

Goodnickoff

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this involves extra code damn but it works, thank you ! – itsme Feb 18 '14 at 10:27

score 2 · Answer 2 · answered Feb 18 '14 at 10:24

2

Angular.js probably calls toString() on the printed values.

false.toString();

The above results in string "false".

answered Feb 18 '14 at 10:24

mingos

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No, Angular [calls](https://github.com/angular/angular.js/blob/master/src/ng/interpolate.js#L184) `toJson()` function. – dfsq Feb 18 '14 at 10:36
Indeed. The result is the same in this particular case though. – mingos Feb 18 '14 at 11:19

Angular js - is printing FALSE value as string

2 Answers2