How to do validations using knockout js validations?

Question

I want to do client side validations using knockout js.

for example , I want to validate below element as required, number only and it should not exceed 10 digits? How can we achieve this using knockout js validation ?

<input data-bind='value: phone' required digits='true' maxlength='10' />

any thoughts ?

Damien · Accepted Answer · 2013-06-07 06:11:54Z

2

Take a look at Knockout.validation and use this obsevable extension :

phoneNumber.extend({digit: true}).extend({ maxLength: 10 });

See fiddle

I hope it hepls.

edited Jun 7, 2013 at 6:11

answered Jun 7, 2013 at 6:03

Damien

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1 Comment

Steve Greatrex Over a year ago

FYI you don't need to explicitly define the validations in JS if you have the HTML5 attributes on the element AND you set parseInputAttributes to true as described here

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