Start Validating time in javascript

Validating time in javascript

Great for "required fields" such as email addresses!

input type is that it allows email addresses without a TLD (the "" part of "[email protected]").

This is because RFC822, the standard for email addresses, allows for localhost emails which don't need one.

If you want to require a TLD (and you likely do), you can modify the input type will alert users if the supplied value is not a valid URL.

Once again, you should supply a pattern for browsers that don't support this input type.

While the Constraint Validation API is easy and light-weight, it does have some drawbacks.

You can style fields that have errors on them with the pseudo-selector, but you can't style the error messages themselves. Chrome doesn't display any errors until you try to submit the form.

I tested a ton of them specifically looking for ones that met RFC822 specs.

The one used below, by Richard Willis, was the best one I found.

Add the attribute let's you run regex validations against input values.

If you, for example, required passwords to contain at least 1 uppercase character, 1 lowercase character, and 1 number, the browser can validate that for you.

Bonus CSS tip: style invalid selectors only when they aren't currently being edited with .