Validating email c


In tandem with the new input types and attributes provided by HTML5, CSS3 gives us some new pseudo-classes we can use to provide visual clues to the user as to which form fields are required, which are optional, and which contain validation errors.Required fields can use the Now, in addition to showing the help text when the input field receives focus, we'll also show the help text when the input field's value is invalid.It also means that if you click the label, the associated input tag receives the focus.They also help with accessibility, as the text in the label will be read out to screen reader users: it can therefore be useful to indicate required fields by adding ‘required’ to the label text, as I’ve done above.A few months ago Sandeep introduced us to the HTML Constraint API, showing how we can use the new HTML5 input types and attributes to validate our forms in the browser with minimal Java Script.

This would require no extra work on your part, but would the UX for those using unsupported browsers be satisfactory?Take this simple booking form: attribute for the label tag matches up with the id attribute of the associated input tag.This keeps our HTML semantic, with the labels helping to give meaning to the input controls.What could be easier than setting up an HTML form that captures email addresses, say for a newsletter or notifications?Mistyping an email address in that form, of course, and then have your browser remember that incorrect address for all the signup forms to come.Your validation email will be sent to the email address you signed up with.

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