Field Validation - Sorry No Bubbles

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A recent post revived an old thread that introduce the idea of adding HTML5 Form Validation to the data entry fields of QuickBase forms:

How to Validate Form Fields with Pattern and Display Message Bubbles?
https://community.quickbase.com/quickbase/topics/how-to-validate-form-fields-with-pattern-and-displa...

At the time the post was created there was still hype over how great a feature message bubbles were. It turns out that message bubbles have some limitations although everyone still likes the idea of a built in way (ie no library) of validating HTML form elements. This post demonstrates a workable validation technique that can be used with QuickBase that uses some features of the HTML5 Form Validation but without the message bubbles.

Without a of of instructions I think you can figure out how the demo works - most of your questions will probably be covered in the Notes:





Validate Me Without Message Bubbles ~ Add New Record

https://haversineconsulting.quickbase.com/db/bmqdshqgw?a=nwr

Pastie Database
https://haversineconsulting.quickbase.com/db/bgcwm2m4g?a=dr&rid=635

Notes:

(1) For a variety of reasons I decided to provide simple visual feedback (no explicit text) when an invalid field is blurred. The border of the input will turn red when the input is invalid and will disappear if valid.

(2) The script does not prevent you from saving an invalid record (although it could with a simple mod) - it only provides immediate visual feedback of invalid input.

(3) Most of the examples use the pattern attribute to define a valid regular expression for the field. Patterns are expressed as string attributes values and are compiled by your browser to be case insensitive so you have to explicitly write your regular expression to accommodate case sensitivity. Also, you made need to escape some characters in the string to properly define your regular expression.

(4) I used placeholder attributes to hint at the format expected for the field and displayed the placeholder in blue and unity opacity.

(5) The final examples uses the min and max attributes to define set the bounds on the number field. Some adjustments were made in the code to lengthen the width of the type=number field and to effectuate changing the type from type=text to type=number; the $().prop() method was used rather than the $().attr() method (you can's change the type attribute of an <input> element).

(6) I only test this in Chrome but I would be surprised if it didn't work in other browsers. Let me know.

(7) You should be able to use the code in the demo to create your own validation logic. The most difficult part might be writing the pattern but there are ample resources on the internet to lookup standard regular expression for common identifiers. Below is a handy dandy special regexp for ultra precise validation of an email address. You always want to validate your emails so you don't want to loose a new customer if they mistakenly enter an invalid email addy on your form.

Mail::RFC822::Address: regexp-based address validation
http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html

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