ufk ufk - 3 months ago 10
Dart Question

using js.dart to expose auth0 API

I'm new to Dart programming so please bare with me :)

I'm writing an DArt Angular2 application but it's irrelevant to the problem at hand.

I'm trying to use Auth0Lock with dart by exposing it's API using 1https://pub.dartlang.org/packages/js.

I'm using Dartium to debug the application.

so I'm exposing the Auth0Lock API using the following auth0lock.dart file:

import 'package:js/js.dart';

@JS()
class Auth0Lock {
external factory Auth0Lock(String token, String domain, Object options);
external on(String event, Function func);
external show();
}


I exposed only the basic stuff I need.

then I created an Angular2 service in a file named
auth0_service.dart
that has the following code:

import 'package:angular2/core.dart';
import 'auth0lock.dart';
import 'app.config.dart';

@Injectable()
class Auth {
Auth0Lock lock;

Auth() {
this.lock = new Auth0Lock(configObj.auth0.apiKey, configObj.auth0.domain,{});
}
updateProfileName(data) {
var profile = data['profile'] != null ? data['profile'] : data;
print(profile['name']);
}

authenticated() {
return false;
}

login() {
this.lock.show().then(this.updateProfileName);
}


}


I'll also show my
index.html
where I load auth0:

<!DOCTYPE html>
<html>
<head>
<title>Demo App</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<link rel="stylesheet" href="www/styles.css">
<script src="https://cdn.auth0.com/js/lock/10.0.0/lock.min.js"></script>
<script defer src="/web/main.dart" type="application/dart"></script>
<script defer src="/packages/browser/dart.js"></script>
</head>
<body>
<my-app></my-app>
</body>
</html>


when I run my application I get the ollowing error:

EXCEPTION: No static method 'Auth0Lock.' declared in class 'Auth0Lock'.


so Auth0Lock is not a static method, it's a constructor for the class. so I must used the JS api wrong somehow.

any ideas?

ufk ufk
Answer

i need to prepend to the auth0lock.dart the following:

@JS()
library test;

actually I can rename test to anything I want... iI just need to add the js tag and library with a name. that solved it.

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