处理禁用的javascript用户会话

Question

I have a registration page that internal users must use to register to use the site. I'm using javascript to make sure all required field are populated.

I just ran into an issue where a users browser has javascript diabled.

Now I want to be able to check if the browser has javascript disabled I want to do the check on the server and if a required field is empty I will send a message back to the user to populate that field.

Thank you

Answer 1

If you want to show validation messages without javascript - you need to validate forms on server (actually, you need to always valdiate forms server-side) and generate different HTML.

It depends on framework/language you are using to generate HTML.

For example in MVC/C# you will be using something like Html.ValidationMessageFor(m => m.whatever)

You actually should keep them both: javascript (for those who use javascript) to prevent sending wrong data to server.

And then on server you double-check and return modified html

Answer 2

Typically if a user has javascript disabled on their session/browser I will direct them to either enable it before proceeding. If your form is not using Ajax or rather is not "reliant" on Ajax then it's possible to formulate a response back to the user.

if (is_ajax()) {

//Do your normal processing

} else {

//Validate each input server side, you have to write your own validation here.

$response = array();
if (is_string($_REQUEST['input:name'])) {

} else {
 $response['error'] = true;
 $response['errorMessage'] = 'Your error message.';
 //Handle getting this back to the front end of your registration page.
}

}