jQuery script doesn't run in Internet Explorer (syntax error on line 1 char 1)

Question

I'm working on a responsive html mockup for a new project, and it contains some jquery scripts which run perfectly on every browser... Except for Internet Explorer (I'm currently testing it on IE9). I naturally checked IE's javascript console, which gives me the following error message : ``` SCRIPT1002: Syntax error scripts.js, line 1 character 1 ``` I have absolutely no idea where that could come from, as neither DreamWeaver or Komodo Edit detect anything wrong. The mockup is online at the following address : http://zipion-live.be/cal-bw/ And here's the script which causes the error : ``` const visible = "visible"; const hidden = "hidden"; const open = "open"; $(document).ready(function(e) { $(".collapsible_container .links").hide(); showHomeMenu(); $("#home_link").click(showHomeMenu); $("#admin_link").click(showAdminMenu); $("#left_menu .links a").click(function() { $("#left_menu .links").slideUp("fast"); $("#left_menu .collapsible_container").removeClass(open); }); $("section .sect…

Accepted Answer

Although `const` is a Javascript 1.5 standard feature it is not supported by modern versions of IE (6-10). Only gecko based browsers and Chrome support it.

Variables nowadays in javascript use `var`, not `const` to avoid this problem.

Change this :

```
const visible = "visible";
const hidden = "hidden";
const open = "open";
```

To this:

```
var visible = "visible";
var hidden = "hidden";
var open = "open";
```

jQuery script doesn't run in Internet Explorer (syntax error on line 1 char 1)

Solution

Problem