Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.
Great for "required fields" such as email addresses!
In other words if the first condition fails, the second condition will not be tested and so forth.
Only when all conditions have been satisfied do we reach the command, in which case the form will be submitted.
This tutorial will show you how to create a Java Script-enabled form that checks whether a user has filled in the form correctly before it's sent to the server. First we'll explain why form validation is a useful thing, and then build up a simple example form, explaining things as we go along.
At the end, there's a little exercise to keep you busy too!
Below you’ll find out how you can do that using Java Script.
Let’s start with building a registration form with multiple input fields, so that we can have something more concrete to work on.
The “validation descriptor” is nothing but a string specifying the type of validation to be performed.For an alternative approach to client-side form validation, without Java Script, check out our new article on HTML5 Form Validation which is available now in most modern browsers.
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