angular2: Uncaught SyntaxError: Unexpected token <

Question

I keep getting this error Uncaught SyntaxError: Unexpected token < whenever I try to run my angular2 application. This is just a modification based on the routing 'tutorial' of the angular2 website.

Normally these kind of errors speak for themselves where I miswrote a piece of code. But the Chrome console tells me the error occurs inside of an angular2 js file.

Reading and trying the answers from both Chrome Uncaught Syntax Error: Unexpected Token ILLEGAL and warning C4819: How to find the character that has to be saved in unicode? didn't work. Guessing that the error has to be somewhere in my boot.ts or app.component.ts.

boot.ts

import {bootstrap}        from 'angular2/platform/browser';
import {ROUTER_PROVIDERS} from 'angular2/router';
import {AppComponent}     from './app.component';
import {HallService}     from './hall/hall.service';
bootstrap(AppComponent,[
    ROUTER_PROVIDERS,
    HallService
]);

app.component.ts

import {Component} from 'angular2/core';
import {RouteConfig, ROUTER_DIRECTIVES} from 'angular2/router';
import {HallCenterComponent} from './hall/hall-center.component';

@Component({
    selector: 'my-app',
    template: `
    <h1 class="title">Component Router</h1>
    <a [routerLink]="['HallCenter']">Hallen</a>
    <a>Heroes</a>
    <router-outlet></router-outlet>
  `,
    directives: [ROUTER_DIRECTIVES]
})
@RouteConfig([
    {
        path: '/hall/...',
        name: 'HallCenter',
        component: HallCenterComponent,
        useAsDefault: true
    }
])
export class AppComponent { }

index.html

<html>
<head>
    <base href="/">
    <title>Factory project</title>
    <link rel="stylesheet" href="styles.css">
    <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script src="node_modules/rxjs/bundles/Rx.js"></script>
    <script src="node_modules/angular2/bundles/angular2.dev.js"></script>
    <script src="node_modules/angular2/bundles/router.dev.js"></script>
    <script>
        System.config({
            packages: {
                app: {
                    format: 'register',
                    defaultExtension: 'js'
                }
            }
        });
        System.import('app/boot')
                .then(null, console.error.bind(console));
    </script>
</head>
<body>
<my-app>loading...</my-app>
</body>
</html>

hall-center.component.ts

import {Component}     from 'angular2/core';
import {RouteConfig, RouterOutlet} from 'angular2/router';
import {HallListComponent}   from './hall-list.component';
import {HallDetailComponent} from './hall-detail.component';
import {HallService}         from './hall.service';

@Component({
    template:  `
    <h2>HALL CENTER</h2>
    <router-outlet></router-outlet>
  `,
    directives: [RouterOutlet],
    providers:  [HallService]
})
@RouteConfig([
    {path:'/',         name: 'HallCenter', component: HallListComponent, useAsDefault: true},
    {path:'/:id',      name: 'HallDetail', component: HallDetailComponent},
    {path:'/list/:id', name: 'HallList',   component: HallListComponent}
])
export class HallCenterComponent { }

what do you use as a server? I usually get that kind of errors when I map the routes badly on the server and it returns index.html instead of javascript — toskv, Dec 30 '15 at 18:41
There are already several questions with similar errors. Did you check them http://stackoverflow.com/search?tab=votes&q=%5bangular2%5d%20unexpected%20token — Günter Zöchbauer, Dec 30 '15 at 18:42
@Günter Zöchbauer I have tried 5 solutions so far, either I already had them in my code or it didn't help :s — Edito, Dec 30 '15 at 19:36

score 22 · Answer 1 · edited Mar 05 '16 at 23:45

22

So the above answers seem to be correct but here is some information about the error itself (just for others who run into the same problem wondering what they did wrong) because it can appear with literally each single import and is quite difficult to track down.

It appears whenever a file is required and the webserver is configured to just serve / instead of a 404-file-not-found-page.

/ usually then translates to /index.html and there the first character usually is < (mostly the start of <!DOCTYPE html>) and since that is no valid javascript the browser throws an illegal token exception.

edited Mar 05 '16 at 23:45

Lior Elrom

19,660
16
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answered Mar 05 '16 at 22:50

Haringat

221
2
2

1

This answer is what helped me. It pointed me to the fact that I had a misspelling in my import. I had **from 'angular2/Router'** instead of **from 'angular2/router'** – Jim Gilmartin Mar 12 '16 at 23:55
I wish I could put another like in this answer – Francisco Jul 28 '16 at 23:19
Typo for 'rxjs' as 'rxsj' and was getting this error. Caused me to re-evaluate my imports and fix my issues. Thanks! – Jaime Still Aug 05 '16 at 13:46
Thanks! This acutally hit the core of my problem since I am not that familiar with AppEngine yet! – yeelan Sep 02 '16 at 19:17
This answer helped me as well. Using Fiddler I saw that all missing packages came up as blue lines and same Body size. – Snorre Oct 24 '16 at 13:12
How do we actually change the settings so it serves up a 404 instead of index.html? – Gene Parcellano Nov 07 '16 at 17:16

score 5 · Accepted Answer · answered Dec 30 '15 at 20:35

5

You have several issues:

you component selector is : 'my-app'

<app>Loading...<app>

should be

<my-app>Loading...</my-app>

Also, you are importing a wrong file:

System.import('app/app');

should be

System.import('app/boot');

Also, unless you are compiling your typescript to java script.. you should change this line and import typescript.js

{defaultExtension: 'js'}}

should be

{defaultExtension: 'ts'}}
<script src="https://code.angularjs.org/tools/typescript.js"></script>

Also, you are missing few imports:

<script src="https://code.angularjs.org/2.0.0-beta.0/angular2-polyfills.js"></script>
<script src="https://code.angularjs.org/tools/system.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/Rx.js"></script>

Here is a plunker of your code working

answered Dec 30 '15 at 20:35

Abdulrahman Alsoghayer

16,462
7
51
56

Yes sorry, the whole app/my-app was wrong I edited my question, I had 2 projects mixed up, thanks you. – Edito Dec 30 '15 at 20:51
Your plunker seems to work fine, however when I make these changes into my project it gives the "Uncaught RangeError: Maximum call stack size exceeded" like said here http://goo.gl/O3EVGP. Even after disabling all my functions, I think I'm going to start from scratch this angular2 stuff is giving me nightmares.. – Edito Dec 30 '15 at 21:23
The problem could be on one of these files 'hall-list.component', './hall-detail.component' , './hall.service'.. could you post them? – Abdulrahman Alsoghayer Dec 30 '15 at 21:46
I couldn't regenerate your "Maximum call stack" issue. But here is your [plunker](https://plnkr.co/edit/ddBgosBQQN94KbQv40DI?p=preview) working .. I just fixed some imports and removed your 2 comments /* implements OnInit */ << they were causing problems!! – Abdulrahman Alsoghayer Dec 31 '15 at 01:23

Eggy · Answer 3 · 2015-12-30T19:45:22.690

3

I suppose, you have installed angular 2 beta release. In this case you have to install additional modules:

npm install es6-promise@^3.0.2 es6-shim@^0.33.3 reflect-metadata@0.1.2 rxjs@^5.0.0-beta.0 zone.js@0.5.10 --save

And import these scripts:

<!-- ES6-related imports -->
<script src="../node_modules/angular2/bundles/angular2-polyfills.min.js"></script>
<script src="../node_modules/es6-shim/es6-shim.min.js"></script>
<script src="../node_modules/systemjs/dist/system.js"></script>
<script>
  //configure system loader
  System.config({defaultJSExtensions: true});
</script>
<script src="../node_modules/rxjs/bundles/Rx.js"></script>
<script src="../node_modules/angular2/bundles/angular2.min.js"></script>
<script src="../node_modules/angular2/bundles/http.min.js"></script>
<script src="../node_modules/angular2/bundles/router.min.js"></script>
<script>
  //bootstrap the Angular2 application
  System.import('app/app').catch(console.log.bind(console));
</script>

EDIT:

In fact, these changes where introduced in alpha 49

edited Dec 30 '15 at 19:45

answered Dec 30 '15 at 19:25

Eggy

4,052
7
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I just used 'npm install', so normally it has everything installed right? The node_modules folders is about 90mb in size. – Edito Dec 30 '15 at 19:37
@Edward If you are using angular 2.0.0-beta.0 those packages have to be installed separately. – Eggy Dec 30 '15 at 19:40
ok I will try this, quick question do I only need to import this into my index.html or in every 'class' I'm using angular2 stuff? – Edito Dec 30 '15 at 20:03
@Edward Only into `index.html` – Eggy Dec 30 '15 at 20:04
Well it fixed the illegal token problem, but instead I get this error "Uncaught RangeError: Maximum call stack size exceeded". I assume this hasn't anything to do with the changes I just made but with my app in general? – Edito Dec 30 '15 at 20:39
@Edward Most likely you have somewhere infinite recursive function. – Eggy Dec 30 '15 at 20:44

score 2 · Answer 4 · answered Jan 22 '16 at 22:28

2

In my case the error came from forgetting to include

<script src="node_modules/angular2/bundles/router.min.js"></script>

in index.html

answered Jan 22 '16 at 22:28

Michael Gikaru

447
1
6
10

score 2 · Answer 5 · answered May 01 '16 at 11:41

2

In my case I had

import {Observable} from 'rxjs/rx';

which was giving error.

I changed to

import {Observable} from 'rxjs/Rx';

and problem went away. So mind the case-sensitivity.

answered May 01 '16 at 11:41

imahama

51
1

I also had some issues sometimes with referencing the directory, for example sometimes `from './rxjs/Rx';` and sometimes it had to be `from 'rxjs/Rx';` can't remember which one where – Edito May 05 '16 at 08:45

score 0 · Answer 6 · answered Feb 05 '16 at 21:31

Ran into this in beta 3 using the rxjs v5.0.0-beta.0 package recommended in the Angular 2 quick start. I switched from the npm package to the one on the Angular beta CDN and it worked fine.

<script src="https://code.angularjs.org/2.0.0-beta.3/Rx.js"></script>

score 0 · Answer 7 · answered Feb 10 '16 at 05:23

0

Ran into this today using Angular 2.0.0-beta.0 and rxjs. Had to change

import * as Rx from 'rxjs';

to

import * as Rx from 'rxjs/Rx';

answered Feb 10 '16 at 05:23

Dennis Hackethal

13,662
12
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score 0 · Answer 8 · answered Apr 16 '16 at 18:46

make sure to add full path when you import. Also make sure to add ./ in front of files you import which are in the same directory.

So if file.ts wants to import service.ts which resides in the same directory then you shoule write the import like this:

import {service} from './service'

if you write

import {service} from 'service'

then you will get this error

score 0 · Answer 9 · answered May 08 '18 at 14:01

This is due to SystemJS trying to fetch rxjs methods from a relative path instead of the library itself

I had to insert this line of code inside the Systemjs configuration System.config({})

paths: {
 'rxjs*': 'node_modules/rxjs/bundles/Rx.min.js'
}

Took me several hours to find this solution

source

angular2: Uncaught SyntaxError: Unexpected token <

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