Detecting Javascript And Cookie Compatibility

Detecting Javascript And Cookie Compatibility JavaScript Detecting Javascript And Cookie Compatibility

You may be expecting a huge dump of code to see if JavaScript and cookies are enabled. There ’ s no way
that you ’ d want to go through with something like that at this point in the project, so the following
minimalist code is offered as a decent check for JavaScript compatibility:
< noscript >
You will not be able to view this site if JavaScript is not enabled.
Please turn on JavaScript to use this site.
< /noscript >

all you need to put in your template view, and you ’ re 100 percent covered. If they don ’ t
have JavaScript turned on, they get this message. There really is no way to test to see if JavaScript is
turned on (after all, if it is off, you can ’ t run a test to see if it is on.
if (true){
//do something here, we must be on
}else{
//well shucks, JavaScript turned off, there’s no way to send an error message!
}

The < noscript > option is very straightforward and displays just the error message. You might want to
add some branding to it, like the Claudia ’ s Kids logo, maybe a phone number or other information, but
that ’ s about as good as it gets. You could also contemplate removing the AJAX handlers from the
shopping carts, but that seems a bit much.

The same thing goes when checking for cookie support. You ’ ll need just a small bit of code that will try
to set a test cookie with a value say, the integer 1. If the site can write the cookie and retrieve it OK, then
cookies are supported. If not, display an error message.

< script >
var tcookie = new Date();
check_cookie = (tcookie.getTime() + ‘’);
document.cookie = “check_cookie=” + check_cookie + “; path=/”;
if (document.cookie.indexOf(check_cookie,0) < 0) {
alert(“You will not be able to view this site if cookies are not enabled.
Please enable them now.”);
}

< /script >

Posted by Hodie J