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I'm trying to run a basic Angular2 app. However currently running into the following error when I run the app with live-server and npm start:

Uncaught ReferenceError: ng is not defined

I have the latest Angular2 npm installed. Here is my markup:

<html>
    <head>
        <title></title>
        <script src=".19.6/dist/system.js"></script>
        <script src=".js"></script>
        <script src=".0.0-beta.0/angular2-polyfills.js"></script>
        <script src=".0.0-beta.0/Rx.js"></script>
        <script src=".0.0-beta.0/angular2.dev.js"></script>

        <script src="node_modules/angular2/bundles/angular2.dev.js"></script>
        <script src="app.js"></script>
    </head>
    <body>
        <first-p></first-p>
    </body>
</html>

My app.js file:

var FirstComponent = ng.
    Component({
        selector: 'first-p'  
    })
    .View({
        template: '<h2>I am learning {{ myFramework }}</h2>'
    })
    .Class({
        constructor: function() {
            this.myFramework = "Angular2";
        }
    });

document.addEventListener('DOMContentLoaded', function() {
    ng.bootstrap(firstComponent);
});

I'm trying to run a basic Angular2 app. However currently running into the following error when I run the app with live-server and npm start:

Uncaught ReferenceError: ng is not defined

I have the latest Angular2 npm installed. Here is my markup:

<html>
    <head>
        <title></title>
        <script src="https://rawgithub./systemjs/systemjs/0.19.6/dist/system.js"></script>
        <script src="https://code.angularjs/tools/typescript.js"></script>
        <script src="https://code.angularjs/2.0.0-beta.0/angular2-polyfills.js"></script>
        <script src="https://code.angularjs/2.0.0-beta.0/Rx.js"></script>
        <script src="https://code.angularjs/2.0.0-beta.0/angular2.dev.js"></script>

        <script src="node_modules/angular2/bundles/angular2.dev.js"></script>
        <script src="app.js"></script>
    </head>
    <body>
        <first-p></first-p>
    </body>
</html>

My app.js file:

var FirstComponent = ng.
    Component({
        selector: 'first-p'  
    })
    .View({
        template: '<h2>I am learning {{ myFramework }}</h2>'
    })
    .Class({
        constructor: function() {
            this.myFramework = "Angular2";
        }
    });

document.addEventListener('DOMContentLoaded', function() {
    ng.bootstrap(firstComponent);
});
  • javascript
  • angular
Share Improve this question edited Jun 4, 2017 at 13:45 Francesco Borzi 62.4k56 gold badges198 silver badges276 bronze badges asked Jan 11, 2016 at 17:26 Leon GabanLeon Gaban 39.1k122 gold badges349 silver badges550 bronze badges 1
  • 1 First you have twice angular2.dev.js, second if you want to write in ES5 you should use one of the umd bundles. Check this table. – Eric Martinez Commented Jan 11, 2016 at 18:23
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1 Answer 1

Reset to default 2

From:

https://angular.io/guide/quickstart

you are missing the boot.js file which bootstrap's the whole thing before you start using it, in your file you are using the ng object before the DOM has loaded (DOMContentLoaded). That's why you have the wrapper on:

document.addEventListener('DOMContentLoaded', function() {
    ng.bootstrap(firstComponent);
});

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