angular2: Uncaught SyntaxError: Unexpected token <

javascript typescript syntax-error token angular

27,195

Solution 1

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

Solution 2

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.

Solution 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 [email protected] rxjs@^5.0.0-beta.0 [email protected] --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

Solution 4

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.

Solution 5

In my case the error came from forgetting to include

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

in index.html

View more solutions

27,195

eduvv

Updated on May 09, 2020

Comments

eduvv almost 4 years

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 { }

toskv over 8 years

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
Günter Zöchbauer over 8 years

There are already several questions with similar errors. Did you check them stackoverflow.com/…
eduvv over 8 years

@Günter Zöchbauer I have tried 5 solutions so far, either I already had them in my code or it didn't help :s

eduvv over 8 years

I just used 'npm install', so normally it has everything installed right? The node_modules folders is about 90mb in size.
Eggy over 8 years

@Edward If you are using angular 2.0.0-beta.0 those packages have to be installed separately.
eduvv over 8 years

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?
Eggy over 8 years

@Edward Only into index.html
eduvv over 8 years

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?
Eggy over 8 years

@Edward Most likely you have somewhere infinite recursive function.
eduvv over 8 years

Yes sorry, the whole app/my-app was wrong I edited my question, I had 2 projects mixed up, thanks you.
eduvv over 8 years

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 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..
Abdulrahman Alsoghayer over 8 years

The problem could be on one of these files 'hall-list.component', './hall-detail.component' , './hall.service'.. could you post them?
Abdulrahman Alsoghayer over 8 years

I couldn't regenerate your "Maximum call stack" issue. But here is your plunker working .. I just fixed some imports and removed your 2 comments /* implements OnInit */ << they were causing problems!!
Jim Gilmartin about 8 years

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'
eduvv almost 8 years

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
Francisco over 7 years

I wish I could put another like in this answer
Jaime Still over 7 years

Typo for 'rxjs' as 'rxsj' and was getting this error. Caused me to re-evaluate my imports and fix my issues. Thanks!
yeelan over 7 years

Thanks! This acutally hit the core of my problem since I am not that familiar with AppEngine yet!
Snorre over 7 years

This answer helped me as well. Using Fiddler I saw that all missing packages came up as blue lines and same Body size.
Gene Parcellano over 7 years

How do we actually change the settings so it serves up a 404 instead of index.html?