Uncaught SyntaxError: Unexpected token when using localhost

Question

I am new to javascript, need help. I have created a index.html and a app.js (both in same path), and have hosted the index.html as localhost.

When I run individual index.html I do get the hello alert, but when I run using localhost I get "Uncaught SyntaxError: Unexpected token <" error.

Below is the code that i used:

Index.html:

<!DOCTYPE HTML>
<html>
    <head>
        <title>Show Javascript alert</title>
        <script type="text/javascript" src="app.js"></script>
    </head>
    <body>
    </body>
</html>

app.js:

function display_alert(){
    alert("Hello!");
}
window.onload = display_alert;

First of all I would change your window.onload = display_alert; to window.onload = display_alert(); Take a look here for more information. — Grant Weiss
– Grant Weiss, Commented Jul 23, 2015 at 5:57
I works on my localhost. Seems like Your app.js has invicible or dirty symbols. here is original files: qush.it/nrcW — num8er
– num8er, Commented Jul 23, 2015 at 5:58
The error message doesn't seem related to the code in the question. — AD7six
– AD7six, Commented Jul 23, 2015 at 5:59
maybe because chrome appends <![CDATA[ string to beginning of code so that's why You get error. but I don't think that this error could appear from code You've provided. Give more information. — num8er
– num8er, Commented Jul 23, 2015 at 6:02
@GrantWeiss When you use window.onload = display_alert(); then the function display_alert is called right away. When you are using it like in the Original Post, the function is excecuted, when the onload event occurs. This seems like the desired behaviour. — Torben H.
– Torben H., Commented Jul 23, 2015 at 6:21

Torben H. · Accepted Answer · 2015-07-23 06:02:38Z

1

I think the Webserver is not serving your app.js File. Have you tried to open it in your Browser, to check if the Path is right?(e.g. http://localhost/app.js).

Check if the Name of the File is Lowercase as well and if the Webserver has read Permissions on the File.

answered Jul 23, 2015 at 6:02

Torben H.

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8 Comments

user3370658 Over a year ago

Hi Torben, when i open "localhost:8080/app.js" it opens the index.html. What could be the reason?

Torben H. Over a year ago

Which Webserver are you using? What is the operating System of your Server?

user3370658 Over a year ago

I am using node.js webserver, on Windows 7 Enterprise SP1.

Torben H. Over a year ago

Than it should be an error in your HTTP-Route definitions inside your node.js script. I have to see your node.js code to determine the Problem

Torben H. Over a year ago

Node.js is not a Webserver by itself. you must have some kind of skript to make it server Files over http. Which command are you using to start the Server?

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